34 results on '"Xingliang Deng"'
Search Results
2. Study on Reservoir Characteristics and 3D Spatial Carving of Fault Solution Reservoirs Based on Geophysical Methods
- Author
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Rujun Wang, Xingliang Deng, Jie Zhang, Peng Wang, Zhiliang Liu, Guohui Li, Qiong Jiang, and Cong Xu
- Subjects
Chemistry ,QD1-999 - Published
- 2024
- Full Text
- View/download PDF
3. Segmentation and lateral growth of intracratonic strike-slip faults in the northern Tarim Basin, NW China: influences on Ordovician fault-controlled carbonate reservoirs
- Author
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Xingliang Deng, Jiajun Chen, Peng Cao, Yintao Zhang, Xiao Luo, Shaoying Chang, Jinlong Shen, Yifan Du, and Mengxiu Wang
- Subjects
fault segmentation ,intracratonic strike-slip fault ,kinematic evolution ,fault-controlled carbonate reservoir ,Tarim Basin ,Science - Abstract
Intracratonic strike-slip faults have been recognized as a major factor controlling the formation of fracture-cave carbonate reservoirs in deep buried basins, yet which properties and how the strike-slip faults influence reservoir distribution and their connectivity are still ambiguous. This uncertainty significantly restricts hydrocarbon exploration and development, such as in the Fuman oilfield, northern Tarim Basin, NW China. Using a high-resolution 3D seismic reflection survey and borehole data, we investigated the geometry and kinematic evolution of the FI17 fault zone in the Fuman oilfield. This fault zone is characterized by a single fault zone, pop-up or pull-apart structures, right-stepping en echelon normal faults, and much smaller displacement (
- Published
- 2023
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- View/download PDF
4. Highly accurate oil production forecasting under adjustable policy by a physical approximation network
- Author
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Haochen Wang, Kai Zhang, Xingliang Deng, Shiti Cui, Xiaopeng Ma, Zhongzheng Wang, Ji Qi, Jian Wang, Chuanjin Yao, Liming Zhang, Yongfei Yang, and Huaqing Zhang
- Subjects
Production prediction ,Machine learning ,Adjustable policy ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Petroleum is widely used as one of the important energy sources. Engineers need to continuously adjust strategies to maximize oil recovery during development. Then strategy adjustment requires a lot of cost, so it is necessary to select the optimal strategy through production forecasting. In this paper, a self-defined Double-channel Heterogeneous Dynamical Graph network (DHDG) is proposed deal with this problem. It can receive different development strategies predict future production indices base on that. Particularly, the concept of graph network is used for the first time to simulate the well pattern and predict production of all wells in the block at same time. At the same time, in order to fully fit the seepage process between wells, we complicate the edge features of the graph, so that it has enough capacity to express the state information of the formation between wells. Finally, we amplify the features of network output through engineering calculations, which further ensured the integrity of the information transmitted in the recursive process. The example results in two benchmark reservoirs show that it is accurate enough to predict oil production rate in future 600 days and more accurate than LSTM networks.
- Published
- 2022
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- View/download PDF
5. Theoretical exploration of water injection gravity flooding oil in ultra-deep fault-controlled fractured-cavity carbonate reservoirs
- Author
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Xuewen YANG, Rujun WANG, Xingliang DENG, Shiyin LI, Hui ZHANG, and Chao YAO
- Subjects
Tarim Basin ,Ordovician ,fault-controlled carbonate reservoir ,fractured-cavity carbonate reservoir ,water flooding ,gravity flooding ,Petroleum refining. Petroleum products ,TP690-692.5 - Abstract
Based on the analysis of geological characteristics of ultra-deep fault-controlled fracture-cavity carbonate reservoirs and division of reservoir units, two physical models were made, and physical simulations of oil displacement by water injection were carried out to find out water flooding mechanism in the fault-controlled fracture-cavity carbonate reservoir under complex flow state. On this basis, a mathematical model of fault-controlled carbonate reservoir with coexisting seepage and free flow has been established. Pilot water injection tests have been carried out to evaluate the effects of enhancing oil recovery by water injection. The results show that: fault-controlled fracture-cavity carbonate reservoir units can be divided into three types: the strong natural energy connected type, the weak natural energy connected type and the weak natural energy isolated type; the fault-fracture activity index of the fault-controlled fractured-cavity body can effectively characterize the connectivity of the reservoir and predict the effective direction of water injection; the mathematical model of fault-controlled carbonate reservoir with coexisting seepage and free flows can quantitatively describe the fluid flow law in the fracture-cavity body; the water injected into the fault-controlled fracture-cavity body is weakly affected by the capillary force of the lithologic body, and the oil-water movement is mainly dominated by gravity. The development modes of single well water injection, unit water injection, and single well high pressure water injection proposed based on the connection structure of fracture- cavity space and well storage space configuration are confirmed effective by pilot tests, with obvious water injection gravity flooding effect.
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- 2022
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6. Potential of Phase-Amplitude-Based Multi-Scale Full Waveform Inversion with Total-Variation Regularization for Seismic Imaging of Deep-Seated Ores
- Author
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Yongzhong Xu, Yong Hu, Zhou Xie, Liguo Han, Yintao Zhang, Jingyi Yuan, Xiaoguo Wan, and Xingliang Deng
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full waveform inversion ,total-variation regularization ,time-frequency domain ,phase-amplitude ,ore bodies inversion ,Mineralogy ,QE351-399.2 - Abstract
As the demand for ore resources increases, the target for mineral exploration gradually shifts from shallow to deep parts of the Earth (>1 km). However, for the ore-hosting strata, it is difficult to obtain high-resolution images by using the electromagnetic method. Seismic full waveform inversion (FWI) is an optimization algorithm which aims at minimizing the prestack seismic data residual between synthetic and observed data. In this case, FWI provides an effective way to achieve high-resolution imaging of subsurface structures. However, acquired seismic data usually lack low frequencies, resulting in severe cycle skipping of FWI, when the initial velocity model is far away from the true one. Phase information in the seismic data provides the kinematic characteristics of waves and has a quasi-linearly relationship with subsurface structures. In this article, we propose to use a phase-amplitude-based full waveform inversion with total-variation regularization (TV-PAFWI) to invert the deep-seated ores. The ore-hosting velocity model test results demonstrate that the TV-PAFWI is suitable for high-resolution velocity model building, especially for deep-seated ores.
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- 2022
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7. Application of EOR Using Water Injection in Carbonate Condensate Reservoirs in the Tarim Basin
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Fuxiao Shen, Shiyin Li, Xingliang Deng, Zhiliang Liu, Ping Guo, and Guanghui Wu
- Subjects
Tarim Basin ,fracture-cave reservoir ,oil recovery from condensate gas reservoir ,water injection ,enhanced oil recovery ,Technology - Abstract
The largest carbonate condensate field has been found in the Tarim Basin, NW China. Different from sandstone condensate gas reservoirs, however, the conventional gas injection for pressure maintenance development is not favorable for Ordovician fracture-cave reservoirs. Based on this, in this paper, 21 sets of displacement experiments in full-diameter cores and a pilot test in 11 boreholes were carried out to study enhanced oil recovery (EOR) in complicated carbonate reservoirs. The experimental results show that the seepage channels of the gas condensate reservoirs are fractures, which are quite different from sandstone pore-throat structures. Condensate oil recovery using water injection was up to 57–88% in unfilled fractured caves and at ca. 52–80% in sand-filled fractured caves. These values are much higher than the 14–46% and 17–58% values obtained from the depletion and gas injection experiments, respectively. The water injection in 11 wells showed that the condensate oil recovery increased by 0–17.7% (avg. 3.1%). The effective EOR for residual oil replacement using water injection may be attributed to fractures, as the gas channel leads to an ineffective gas circulation and pipe flow in fracture-cave reservoirs, which is favorable for waterflood development. The complicated fracture network in the deep subsurface may be the key element in the varied and lower oil recovery rates obtained from the wells than from the experiments. This case study provides new insights for the exploitation of similar condensate gas reservoirs.
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- 2022
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8. Paleokarstic water tables and their control on reservoirs in Ordovician Yingshan Formation, Tazhong Area, Tarim Basin, NW China
- Author
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Haizhou QU, Maoyao LIU, Yunfeng ZHANG, Zhenyu WANG, Zhenghong ZHANG, Shiyin LI, and Xingliang DENG
- Subjects
Petroleum refining. Petroleum products ,TP690-692.5 - Abstract
Based on cores, well logging and karstic paleogeomorphology, the identification method of multi-period paleokarstic water tables and their distribution and control on reservoirs were researched of Yingshan Formation in Tazhong Area, Tarim Basin. Three periods' water tables numbered 1 to 3 have been identified from bottom to top of Yingshan Formation in Tazhong Area. The corresponding typical horizontal undercurrent zones are characterized by single karst fabrics such as sack-like dissolved vugs or subhorizontal channels, combination of various karst fabrics like pre-existing high-angle fractures intersected by small caves and subhorizontal channels, and combination of multi-layered caves and different karst fabrics of large pores. On the plane, periodical rising sea levels caused the development of No.1, No.1 and 2, No.1, 2 and 3 water tables in karst depressions, slopes and highlands respectively. As the result of the nearly horizontal occurrence of Yingshan Formation, submembers of Yingshan Formation had tiny angles with fracture-cave bodies of each period's water table, so the karst reservoirs are characterized by “crossed strata regionally and developed along the stratum locally”. The distance between water table and unconformity, thickness of horizontal undercurrent zone and average thickness of reservoir all tended to increase with the rise of karst landforms. The karst highland and slope had 2-3 periods' water tables and thicker horizontal undercurrent zones, so they had thicker and better quality reservoirs, making them favorable exploration areas. Key words: paleokarstic water table identification, stages and distribution, reservoir-controlled pattern, Ordovician Yingshan Formation, Tazhong area, Tarim Basin
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- 2018
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9. Structural patterns of fault damage zones in carbonate rocks and their influences on petroleum accumulation in Tazhong Paleo-uplift, Tarim Basin, NW China
- Author
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Yuan NENG, Haijun YANG, and Xingliang DENG
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Petroleum refining. Petroleum products ,TP690-692.5 - Abstract
Based on the outcrop survey, 3D seismic data interpretation, drilling data analysis, the structural patterns and distribution of fault damage zones in carbonate strata of Tazhong Paleo-uplift were established to reveal the oil and gas enrichment law in the fault damage zones. The following findings were reached: (1) Through the filed survey, the fault damage zone system consists of fault core, damage zone with branch fault and fracture network. Affected by the active nature of the major faults, the fault damage zones differ in planar pattern and scale along the major faults. (2) 3D seismic profiles reveal that there are three types of fault damage zones in carbonate strata in Tazhong paleo-uplift, strike-slip fault damage zones, thrust fault damage zones and superimposed fault damage zones. Featuring 3 flowers and 3 root belts in vertical, the strike-slip fault damage zone can be subdivided into linear type, oblique type, feather type and horsetail type in plane. Thrust fault damage zones can be further divided into fault anticline type, anticline type and slope type. As the superimposition result of the above two kinds of fault damage zones, superimposed fault damage zones appear in three patterns, intersect type, encompassment type and penetrating type. (3) Cores from wells and geochemical data show oil and gas may migrate along the major fault and laterally. The feather type in strike-slip fault system, fault anticline type in thrust fault damage zone and intersect type in superimposed fault damage zone are possible sites for high production and efficiency wells. Key words: Tazhong Paleo-uplift, carbonate strata, fault damage zone, structural pattern, high production well area
- Published
- 2018
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10. Research on Quantitative Identification of Three-Dimensional Connectivity of Fractured-Vuggy Reservoirs.
- Author
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Xingliang Deng, Peng Cao, Yintao Zhang, Yuhui Zhou, Xiao Luo, and Liang Wang
- Subjects
CARBONATE reservoirs ,QUANTITATIVE research ,POROSITY ,CLOUD computing ,POINT cloud - Abstract
The fractured-vuggy carbonate oil resources in the western basin of China are extremely rich. The connectivity of carbonate reservoirs is complex, and there is still a lack of clear understanding of the development and topological structure of the pore space in fractured-vuggy reservoirs. Thus, effective prediction of fractured-vuggy reservoirs is difficult. In view of this, this work employs adaptive point cloud technology to reproduce the shape and capture the characteristics of a fractured-vuggy reservoir. To identify the complex connectivity among pores, fractures, and vugs, a simplified one-dimensional connectivity model is established by using the meshless connection element method (CEM). Considering that different types of connection units have different flow characteristics, a sequential coupling calculation method that can efficiently calculate reservoir pressure and saturation is developed. By automatic history matching, the dynamic production data is fitted in real-time, and the characteristic parameters of the connection unit are inverted. Simulation results show that the three-dimensional connectivity model of the fractured-vuggy reservoir built in this work is as close as 90% of the fine grid model, while the dynamic simulation efficiency is much higher with good accuracy. [ABSTRACT FROM AUTHOR]
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- 2024
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11. Study on Parallel Testing Technology of Satellite Cable Network
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Kai Wang, Chunteng Shao, Feng Yu, Heying Wang, Wei Feng, Yingshuang Wang, Zheng Zhao, Yumei Liu, and Xingliang Deng
- Published
- 2022
12. Study on the Significance of Folate Receptor-Mediated Staining Solution (FRD) Staining in Screening High Grade Cervical Lesions
- Author
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Xiang Li, Min Xue, Shuijing Yi, Hui Xie, Xiaogang Zhu, Songshu Xiao, and Xingliang Deng
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Adult ,Silver Staining ,medicine.medical_specialty ,Uterine Cervical Neoplasms ,Cervix Uteri ,030204 cardiovascular system & hematology ,Sensitivity and Specificity ,Gastroenterology ,Mice ,03 medical and health sciences ,Folic Acid ,0302 clinical medicine ,Clinical Research ,Internal medicine ,medicine ,Animals ,Humans ,Mass Screening ,DNA Probes, HPV ,Human papillomavirus ,Papillomaviridae ,Early Detection of Cancer ,Aged ,Vaginal Smears ,Kappa value ,Staining and Labeling ,business.industry ,Folate Receptors, GPI-Anchored ,Papillomavirus Infections ,3T3 Cells ,General Medicine ,Middle Aged ,Uterine Cervical Dysplasia ,Staining ,Hpv testing ,Cytology test ,Folate receptor ,030220 oncology & carcinogenesis ,I-kappa B Proteins ,Female ,business - Abstract
BACKGROUND The aim of this study was to investigate the significance of folate receptor-mediated staining solution (FRD) in examination of cervical lesions during gynecological examination. MATERIAL AND METHODS A total of 404 patients participated in this study. FRD staining was applied to screen high grade cervical lesions. ThinPrep cytology test (TCT) and human papillomavirus (HPV) testing were also used for screening high grade cervical lesions. Coincidence rate and KAPPA value of different methods were compared by SPSS software. RESULTS As for CIN2+ and CIN3+, sensitivities for HPV testing were (96.92% and 97.78%) >TCT classification 1 (90.77% and 91.11%) >FRD staining (80.00% and 86.67%) >TCT classification 2 (70.77% and 77.78%), respectively. While specificities for HPV testing were (7.08% and 6.44%)
- Published
- 2019
13. Multi-Level and High-Resolution Fracture Modeling, Simulation and History Matching in Field-scale Reservoir Study
- Author
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Xiao Lei, Juncao Li, Xingliang Deng, Min Yao, Bin Gong, and Yueming Xu
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Seismic anisotropy ,Scale (ratio) ,020209 energy ,Flow (psychology) ,Geometry ,02 engineering and technology ,Modeling and simulation ,Reservoir simulation ,020401 chemical engineering ,0202 electrical engineering, electronic engineering, information engineering ,Fluid dynamics ,Fracture (geology) ,Polygon mesh ,0204 chemical engineering ,Geology - Abstract
Carbonate formations are usually highly fractured. The fractures exist at all length scales ranging from microscopic fissures to kilometer-size structures. Consequently, it is vitally important to rigorously characterize the multi-scale fracture system and to accurately model the fluid flow in such highly fractured porous media. In this paper, we will present an integrated workflow for characterization of natural fracture system and accurate numerical modeling of fluid flow in fractured rocks. The fracture characterization usually involves the integration of multiple data sources including core analysis, image logs and seismic interpretations etc., at different scales. The fracture mappings are thus required to perform at different length scales and resolutions. In this study, we present a systematic approach that characterizes the actual fracture distribution with seismic and log interpretations. Firstly, the small-scale fractures are interpreted using image logs and seismic anisotropy analysis with a co-Kriging and stochastic modeling approach. The small-scale fractures are initially constructed in an explicit fashion, and are then incorporated in the matrix medium using a flow-based upscaling procedure. Secondly, the large-scale fractures are mapped out from post-stack seismic data with ant-tracking and maximum curvature analysis. The reservoir is then gridded into unstructured tetrahedral or prism meshes to fully resolve these large fractures. This discrete fracture model (DFM) is employed in a reservoir simulation study based on such grid system. We applied the procedure for simulation study and history match on a portion of a carbonate gas reservoir in Longwangmiao formation in Southwest China. Currently, there are 7 horizontal and 2 vertical wells in operation. Due to the connection of some large-scale fractures to edge water, early water breakthrough and drastic water invasion were observed. We partitioned the reservoir block into 0.6 million cells, in which 153 large-scale and thousands of small-scale fractures are fully resolved. The simulation study was performed and automated history match was successfully achieved using our extended Ensemble Karman Filter algorithm based on a parameterized description of the fractures that are explicitly represented in DFM. This proposed overall procedure is able to efficiently capture such extreme flow dynamics and achieve significantly better history match results.
- Published
- 2019
14. Paleokarstic water tables and their control on reservoirs in Ordovician Yingshan Formation, Tazhong Area, Tarim Basin, NW China
- Author
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Yunfeng Zhang, Zhenyu Wang, Zhenghong Zhang, Shiyin Li, Xingliang Deng, Haizhou Qu, and Maoyao Liu
- Subjects
geography ,geography.geographical_feature_category ,Landform ,Water table ,020209 energy ,Well logging ,Geochemistry ,Energy Engineering and Power Technology ,Geology ,02 engineering and technology ,010502 geochemistry & geophysics ,Geotechnical Engineering and Engineering Geology ,Karst ,01 natural sciences ,Unconformity ,Cave ,Geochemistry and Petrology ,lcsh:TP690-692.5 ,0202 electrical engineering, electronic engineering, information engineering ,Ordovician ,Economic Geology ,lcsh:Petroleum refining. Petroleum products ,Sea level ,0105 earth and related environmental sciences - Abstract
Based on cores, well logging and karstic paleogeomorphology, the identification method of multi-period paleokarstic water tables and their distribution and control on reservoirs were researched of Yingshan Formation in Tazhong Area, Tarim Basin. Three periods' water tables numbered 1 to 3 have been identified from bottom to top of Yingshan Formation in Tazhong Area. The corresponding typical horizontal undercurrent zones are characterized by single karst fabrics such as sack-like dissolved vugs or subhorizontal channels, combination of various karst fabrics like pre-existing high-angle fractures intersected by small caves and subhorizontal channels, and combination of multi-layered caves and different karst fabrics of large pores. On the plane, periodical rising sea levels caused the development of No.1, No.1 and 2, No.1, 2 and 3 water tables in karst depressions, slopes and highlands respectively. As the result of the nearly horizontal occurrence of Yingshan Formation, submembers of Yingshan Formation had tiny angles with fracture-cave bodies of each period's water table, so the karst reservoirs are characterized by “crossed strata regionally and developed along the stratum locally”. The distance between water table and unconformity, thickness of horizontal undercurrent zone and average thickness of reservoir all tended to increase with the rise of karst landforms. The karst highland and slope had 2-3 periods' water tables and thicker horizontal undercurrent zones, so they had thicker and better quality reservoirs, making them favorable exploration areas. Key words: paleokarstic water table identification, stages and distribution, reservoir-controlled pattern, Ordovician Yingshan Formation, Tazhong area, Tarim Basin
- Published
- 2018
15. Structural patterns of fault damage zones in carbonate rocks and their influences on petroleum accumulation in Tazhong Paleo-uplift, Tarim Basin, NW China
- Author
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Haijun Yang, Xingliang Deng, and Yuan Neng
- Subjects
geography ,geography.geographical_feature_category ,Outcrop ,020209 energy ,Anticline ,Energy Engineering and Power Technology ,Drilling ,Geology ,02 engineering and technology ,Fault (geology) ,Geotechnical Engineering and Engineering Geology ,chemistry.chemical_compound ,chemistry ,Geochemistry and Petrology ,lcsh:TP690-692.5 ,0202 electrical engineering, electronic engineering, information engineering ,Fracture (geology) ,Carbonate rock ,Carbonate ,Economic Geology ,Thrust fault ,Petrology ,lcsh:Petroleum refining. Petroleum products - Abstract
Based on the outcrop survey, 3D seismic data interpretation, drilling data analysis, the structural patterns and distribution of fault damage zones in carbonate strata of Tazhong Paleo-uplift were established to reveal the oil and gas enrichment law in the fault damage zones. The following findings were reached: (1) Through the filed survey, the fault damage zone system consists of fault core, damage zone with branch fault and fracture network. Affected by the active nature of the major faults, the fault damage zones differ in planar pattern and scale along the major faults. (2) 3D seismic profiles reveal that there are three types of fault damage zones in carbonate strata in Tazhong paleo-uplift, strike-slip fault damage zones, thrust fault damage zones and superimposed fault damage zones. Featuring 3 flowers and 3 root belts in vertical, the strike-slip fault damage zone can be subdivided into linear type, oblique type, feather type and horsetail type in plane. Thrust fault damage zones can be further divided into fault anticline type, anticline type and slope type. As the superimposition result of the above two kinds of fault damage zones, superimposed fault damage zones appear in three patterns, intersect type, encompassment type and penetrating type. (3) Cores from wells and geochemical data show oil and gas may migrate along the major fault and laterally. The feather type in strike-slip fault system, fault anticline type in thrust fault damage zone and intersect type in superimposed fault damage zone are possible sites for high production and efficiency wells. Key words: Tazhong Paleo-uplift, carbonate strata, fault damage zone, structural pattern, high production well area
- Published
- 2018
16. Well test analysis methods of fractured vuggy carbonate gas reservoirs
- Author
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Hedong Sun, Xingliang Deng, and Tongwen Jiang
- Subjects
chemistry.chemical_compound ,Well test (oil and gas) ,Petroleum engineering ,chemistry ,Well test analysis ,Carbonate ,Performance monitoring ,Analysis models ,Geology ,Reliability (statistics) - Abstract
Well tests for fractured vuggy carbonate gas reservoirs are challenging because of the diversity of well test curves, the ambiguity of interpretation results, and complexity of analysis models. In this section, the three-dimensional numerical well test analysis method and the lifecycle well test analysis method are presented. The multilayer, three-dimensional numerical well test model considers both lateral heterogeneity and vertical heterogeneity, and provides a mathematical description more similar to the actual reservoir performance. The combination of conventional analytical well tests, (2D and 3D), numerical well tests, and advanced production decline analysis can greatly improve the reliability of interpretation results and the forecasting accuracy of key development indices. Moreover, the application of well test analysis results in the gas reservoir description, and the cautions in performance monitoring, are explained.
- Published
- 2019
17. Typical characteristics of fractured vuggy carbonate gas reservoirs
- Author
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Tongwen Jiang, Hedong Sun, and Xingliang Deng
- Subjects
chemistry.chemical_compound ,chemistry ,Geochemistry ,Carbonate ,Geology - Published
- 2019
18. Performance forecasting method of fractured vuggy carbonate gas reservoir
- Author
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Xingliang Deng, Hedong Sun, and Tongwen Jiang
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chemistry.chemical_compound ,chemistry ,Petroleum engineering ,Carbonate ,Performance forecasting ,Geology - Published
- 2019
19. Reserves estimation methods of fractured vuggy carbonate gas reservoirs
- Author
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Tongwen Jiang, Xingliang Deng, and Hedong Sun
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Wellbore ,chemistry.chemical_compound ,Variable (computer science) ,Well test (oil and gas) ,chemistry ,Petroleum engineering ,Well test analysis ,Multiphase flow ,Carbonate ,Environmental science ,Production (economics) ,Estimation methods - Abstract
Performance-based reserves can be estimated by the material balance method, rate transient analysis method, or well test method, among others. These methods can be combined depending on the characteristics of the gas reservoirs. For fractured-vuggy carbonate reservoirs, which are characterized by strong heterogeneity, complex fluid properties, multiphase flow in wellbore, production at variable pressure or variable rate, and poor quality of performance data; the traditional material balance method fails to estimate the single-well performance-based reserves. Therefore, a performance-based reserves estimation method integrating well test analysis and advanced production decline analysis is proposed. The new method can be used to effectively estimate the single-well performance-based reserves in fractured-vuggy gas reservoirs. The single-well performance-based reserves, recoverable reserves, and producing reserves estimation methods are illustrated with examples.
- Published
- 2019
20. Introduction to the dynamic description technique of gas reservoirs
- Author
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Xingliang Deng, Hedong Sun, and Tongwen Jiang
- Subjects
Petroleum engineering ,Dynamic monitoring ,Process (engineering) ,Environmental science ,Performance forecasting - Abstract
This chapter illustrates the connotation, status, role, and methodology of the dynamic description technique of gas reservoirs, and the problems in dynamic monitoring. The core of the single-well dynamic description is the evaluation of deliverability and stable productivity for the purpose of single-well production performance forecasting. The core task of gas reservoirs (clusters) dynamic description is the evaluation on effective reservoir distribution and performance forecasting of gas reservoirs (clusters). Dynamic monitoring and performance analysis are conducted throughout the process of gas reservoir development. The requirements for dynamic monitoring and performance analysis are different depending on the work objectives and tasks for the stages of gas reservoir development.
- Published
- 2019
21. Dynamic Description Technology of Fractured Vuggy Carbonate Gas Reservoirs
- Author
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Hedong Sun, Tongwen Jiang, Xingliang Deng, Hedong Sun, Tongwen Jiang, and Xingliang Deng
- Subjects
- Petroleum engineering
- Abstract
Dynamic Description Technology of Fractured Vuggy Carbonate Gas Reservoirs delivers a critical reference to reservoir and production engineers on the basic characteristics of fractured vuggy gas reservoirs, combining both static and dynamic data to improve reservoir characterization accuracy and development. Based on the full lifecycle of well testing and advanced production decline analysis, this reference also details how to apply reservoir dynamic evaluation and reserve estimation and performance forecasting. Offering one collective location for the latest research on fractured gas reservoirs, this reference also covers physical models, analysis examples, and processes, 3D numerical well test technology, and deconvolution technology of production decline analysis. Packed with many calculation examples and more than 100 case studies, this book gives engineers a strong tool to further exploit these complex assets. - Presents advanced knowledge in well test and production decline analysis, along with performance forecasting that is specific to fractured vuggy carbonate gas reservoirs - Helps readers understand the characteristics, advantages, disadvantages and current limitations in technology of fractured vuggy carbonate gas reservoirs - Provides a bridge from theory to practice by combining static and dynamic data to form more accurate real-world analysis and modeling
- Published
- 2019
22. Integrated dynamic evaluation of depletion-drive performance in naturally fractured-vuggy carbonate reservoirs using DPSO–FCM clustering
- Author
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Liu Zhiliang, Yongle Hu, Xingliang Deng, Daigang Wang, Yong Li, and Baozhu Li
- Subjects
Petroleum engineering ,Computer science ,020209 energy ,General Chemical Engineering ,Organic Chemistry ,Well logging ,Energy Engineering and Power Technology ,Initialization ,Particle swarm optimization ,02 engineering and technology ,010502 geochemistry & geophysics ,01 natural sciences ,Fuzzy logic ,Fuel Technology ,Principal component analysis ,0202 electrical engineering, electronic engineering, information engineering ,Enhanced oil recovery ,Cluster analysis ,0105 earth and related environmental sciences ,Curse of dimensionality - Abstract
Compared to the widely distributed porous and fractured-porous carbonate reservoirs, the naturally fractured-vuggy carbonate reservoirs (NFVCRs) found in Tarim Basin, China, suffer from strong heterogeneity, multiple types of reservoir bodies, poor connectivity, complicated flow behavior and various water–oil interplay relationship in most cases. Due to lack of powerful and suitable EOR (enhanced oil recovery) strategies, depletion-drive recovery is commonly adopted for practical production, and the efficient oilfield development remains a great challenge to all of us. Understanding the relationship between reservoir bodies, configuration, water–oil interplay and depletion-drive performance, is essential to exchange of oilfield development scheme and further potential tapping of the remaining oil. By introducing an self-adaptive particle swarm optimization (DPSO) to tackle the shortcomings of the conventional fuzzy c-means (FCM) in terms of sensitivity to initial values, initialization with randomly generated clustering centers, and easy involvement in local minima, a novel integrated dynamic evaluation method for depletion-drive performance in NFVCRs based on DPSO–FCM clustering is developed. In this paper, different fractured-vuggy reservoir types are identified combing drilling & well logging response, numerical well test analysis and production test. The integrated diagnosis techniques including rate transient analysis, production decline analysis and reservoir energy evaluation, are employed to evaluate reservoir properties, furthermore, principal component analysis (PCA) is performed to reduce the dimensionality of input vector and establish the dynamic evaluation index system of depletion-drive performance. Taking a typical NFVCR in northern Tarim Basin as example, the proposed method is implemented to classify the production responses into four major patterns with eight sub-classes. Moreover, according to the insight of water–oil interplay relationship, depletion-drive production responses and identification of reservoir types, the water influx behaviors are divided into four general patterns. Eventually, the relevant dynamic clustering criterion and suitable potential-tapping strategies or measures are provided.
- Published
- 2016
23. An Analysis Method of Gas Injection Development Effect in the Single well Fractured-Vuggy System
- Author
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Shusheng Gao, Kuerle Xinjiang, Daiyu Zhou, Baohua Chang, Xingliang Deng, Wei Xiong, and Junfeng Liu
- Subjects
Yield (engineering) ,Materials science ,General Computer Science ,Water cut ,Petroleum engineering ,Recovery rate ,Spatial structure ,General Engineering ,Fluid mechanics ,Porosity ,Analysis method - Abstract
In this study, we propose an analysis method of gas injection development effect in the single well fractured-vuggy system. The fractured-vuggy reservoir has a complex spatial structure, oil-water relations and connectivity, of which single well fractured-vuggy system is a simpler model. Aiming at the problems of low recovery rate and production difficulties, based on the elasticity theory and fluid mechanics in porous, the elastic expansion energy and oil-water interface change before and after gas injection in the single well developing fractured-vuggy system are analyzed. And a theoretical mode of development effect after gas injection is built. Then an example analysis of Tarim Oilfield is conducted. The results show that: mining after repeated gas injection, water cut significantly decreased, yield and water free production increases gradually and the replacement rate increases with the gas injection. This shows that gas injection can effectively inhibit the rise of oil-water interface and improve the development effect of fractured-vuggy system.
- Published
- 2013
24. Fracturing Evaluation for Fractured-Caved Carbonate Reservoirs through Pressure Transient Analysis and Rate Transient Analysis
- Author
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Baozhu Li, Liu Zhiliang, Wang Qi, Yong Li, She Zhicheng, and Xingliang Deng
- Subjects
chemistry.chemical_compound ,020401 chemical engineering ,Petroleum engineering ,chemistry ,Carbonate ,Geotechnical engineering ,02 engineering and technology ,0204 chemical engineering ,010502 geochemistry & geophysics ,Transient analysis ,01 natural sciences ,Geology ,0105 earth and related environmental sciences - Abstract
Naturally fractured-caved carbonate reservoirs in China have some distinctive characteristics: deeply buried, multi-scale fractures, vugs and caves developed, strong heterogeneity, poor reservoir connectivity and no oil in matrix. Hydraulic fracturing is commonly used in order to connect offset fracture-cave system with wellbore and improve well performance for this kind of reservoirs, while how to properly evaluate hydraulic fracturing efficiency is still a major challenge. This paper presents an integrated evaluation method to solve this problem. The method mainly involves pressure transient analysis and rate transient analysis. Firstly, typical diagnostic curves of different fracture-cave patterns with and without hydraulic fracturing respectively are established through design analysis of numerical conceptual models. Then the curves are used for actual well stimulation and evaluation. Finally, reservoir properties of fracturing wells such as OOIP, hydraulic fracture properties, reservoir permeability, etc. are evaluated based on the integrated pressure transient analysis and rate transient analysis method. This new method has been applied to Tazhong No.I fractured-caved carbonate gas condensate reservoir in China. The reservoir's mid-depth is around 6000m and is currently under primary depletion development with an average annual production declining rate higher than 25%. Based on the understanding of seismic interpretation and geological study, 3 major reservoir patterns and 7 sub-patterns are classified. Then corresponding conceptual numerical models of these patterns with and without hydraulic fracturing are established, and typical diagnostic curves of pressure transient analysis and rate transient analysis for identification of these patterns are generated. And then, the results are applied to the actual well fracturing evaluation in Tazhong NO. I carbonate gas condensate reservoir. This systematic technique has been successfully applied to Tazhong No. I fractured-caved carbonate reservoir in Tarim Basin of China, which properly and correctly evaluates the properties of the hydraulic fracturing wells. It also provides a reliable method for decision making of hydraulic fracturing, which is helpful for effective and economic development of the reservoir.
- Published
- 2016
25. A Systematic Technique of Production Forecast for Fractured Vuggy Carbonate Gas Condensate Reservoirs
- Author
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Xingliang Deng, Baozhu Li, Jing Zhang, Yong Li, and Liu Zhiliang
- Subjects
chemistry.chemical_compound ,020401 chemical engineering ,chemistry ,Petroleum engineering ,Carbonate ,Production (economics) ,02 engineering and technology ,0204 chemical engineering ,010502 geochemistry & geophysics ,01 natural sciences ,Geology ,0105 earth and related environmental sciences - Abstract
Naturally fractured-vuggy carbonate gas condensate reservoirs in China have some distinctive characteristics: deep buried depth, multi-scale fractures, vugs and caves developed, poor reservoir connectivity and high production decline rate. It is hard to build effective geological models and run reservoir simulation for production forecasting. So how to properly forecast the performance of this kind of reservoirs is a major challenge. This paper presents a systematic technique of production forecast to solve this problem. The systematic technique mainly involves analytical and numerical production analysis (PA), analytical and numerical pressure transient analysis (PTA) and material balance analysis in combination with the geological analysis results. Firstly, using the analytical PA and PTA can quickly and correctly evaluate reservoir properties. Take Tazhong No.1 carbonate gas condensate reservoir in China for example to elaborate the details of this method. The results show that the systematic method can not only properly calculate the reservoir properties, but also can quickly and properly forecast reservoir performance of fractured vuggy carbonate gas condensate reservoirs. And the calibrated dynamic numerical model can both match well production history data and well pressure data. Examples are presented to show how these material balance analysis, analytical and numerical PA and PTA methods fully integrated and constrained with each other, and how the reliable results can be generated finally. Because of the poor connectivity characteristic of Tazhong No. 1 field, dynamic models for each fractured-caved unit should be built and applied for performance prediction.
- Published
- 2016
26. Classification of carbonate gas condensate reservoirs using well test and production data analyses
- Author
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Yongle Hu, She Zhicheng, Xia Jing, Kun Fan, Baozhu Li, Xingliang Deng, Yong Li, and Zhaowei Liu
- Subjects
Well test (oil and gas) ,Engineering ,Petroleum engineering ,business.industry ,Fossil fuel ,Well stimulation ,Energy Engineering and Power Technology ,Geology ,Geotechnical Engineering and Engineering Geology ,Mineral resource classification ,Natural gas field ,chemistry.chemical_compound ,Geophysics ,Fuel Technology ,chemistry ,Geochemistry and Petrology ,Well test analysis ,Carbonate ,Economic Geology ,business ,Type curve - Abstract
Carbonate reservoir patterns play an important role in the production performance of oil and gas wells, and it is usually classified through static data analysis which cannot reflect the actual well performance. This paper takes the Tazhong No. 1 gas field in the Tarim Basin, China as an example to investigate the classification of carbonate reservoirs. The classification method mainly combines well test analysis with production analysis — especially the Blasingame type curve method. Based on the characteristics of type curves for well test analysis and the Blasingame method, the relationship between the type curves and reservoir pattern was established. More than 20 wells were analyzed and the reservoirs were classified into 3 major patterns with 7 sub-classes. Furthermore, the classification results were validated by dynamic performance analysis of wells in the Tazhong No.1 gas field. On the basis of the classification results, well stimulation (i.e. water flooding in a single well) was carried out in three volatile-oil wells, and the oil recovery increased by up to 20%.
- Published
- 2011
27. Different Equivalent Simulation Methods for Fractured-Vuggy Carbonate Gas Condensate Reservoirs
- Author
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Yong, Li, additional, Baozhu, Li, additional, Qi, Wang, additional, and Xingliang, Deng, additional
- Published
- 2017
- Full Text
- View/download PDF
28. Integrated Reservoir Characterization and Distribution of Carbonate Reef- Flat Complexes in Genetic Units of Different Phases of the Ordovician Carbonates in Tarim Basin, Western China
- Author
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Chenji Wei, Gao Yan, Song Benbiao, Wenzhi Zhao, Zhenzhong Cai, Haijun Yang, Yixiang Zhu, and Xingliang Deng
- Subjects
geography ,geography.geographical_feature_category ,business.industry ,Tarim basin ,Distribution (economics) ,Paleontology ,chemistry.chemical_compound ,chemistry ,Ordovician ,Reservoir modeling ,Carbonate ,business ,China ,Reef ,Geology - Abstract
The reservoir characterization and prediction of carbonate reef-flat complexes often have great difficulties because of the complexity of rock-fabrics and the rapid changes of carbonate depositional facies. This paper focuses on a carbonate reservoir in Tarim Basin, China. The dynamic behaviors between adjacent wells vary considerably although they belong to the same depositional facies, which indicates that the reservoir has strong heterogeneity. This paper proposes a new set of carbonate reservoir characterization in genetic units by integrating the geological, petrophysical and geophysical data. According to core-log interpretations, rock fabrics, pore types, reservoir properties, secondary porosity indexes have been acquired. The depositional cycles and key interfaces in stratigraphy sequence framework are determined. The relationships between the rock-fabrics, depositional cycles, reservoir properties, palaeo-weathering surfaces, responses of logs and seismic attributes have been studied, and reservoir genetic-unit models are constructed, which reveals that carbonate genetic units in different phases have specific rock-fabric associations and reservoir properties. The genetic units in different phases are delineated comprehensively in log and seismic data, and different reef-flat distributions are constructed. Finally, the seismic attribute relating to the secondary porosity indexes have been extracted in genetic-unit framework and it reveals the distribution of favorable reservoirs of carbonate reef-flat complexes. This paper reveals that different phases of genetic units of carbonate reef-flat complexes, as containing specific rock-fabric associations, crucial interfaces and fracture-vug development, thus key factors, control the distribution of favorable reservoirs. Phase I genetic unit, formed in relative sea-level rise, mostly with fine rock-fabric association of micrite calcarenite and micrite algae-bound limestones, are filling on the depressions, grooves or the flat area of carbonate platform, and its reservoir properties are very poor. Phase II genetic unit, with the tendency of upward- coarsening fabric association and top exposure surface, is overlaid on highlands along platform margin. Phase III genetic unit, composed of fracture-vug developed sparry gravel-bearing reef-skeletal limestones and sparry gravel- bearing calcarenites of reef-flat complexes, is almost distributed in the platform margin and overlaid on tops and nearby of previous genetic units, which means that, shallow water is suitable to reef-building organism mass-production, but frequent exposures and weathering have made favorable reservoirs developed. Drillings have proved that almost all high-production wells are within the area of phase II and III genetic units. Furthermore, the distribution and complicated internal structure of favorable reservoirs have been revealed by log-calibrated seismic attribute extraction in the framework of phase II and III genetic units. This paper illustrates an integrated case study, which helps geologists and reservoir engineers to support the development of Central Tarim Basin. In addition, it offers a methodology for the research of other similar oilfields.
- Published
- 2015
29. Study on the Significance of Folate Receptor-Mediated Staining Solution (FRD) Staining in Screening High Grade Cervical Lesions.
- Author
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Songshu Xiao, Hui Xie, Xiaogang Zhu, Xiang Li, Shuijing Yi, Xingliang Deng, and Min Xue
- Published
- 2019
- Full Text
- View/download PDF
30. The Role of Seismic Data in the Exploration and Development of Carbonate Karst Cave Reservoir
- Author
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Pin Yang, Yanming Tong, Guanghui Lu, Yangyong Pan, Chunduan Zhao, Zhenzhong Cai, and Xingliang Deng
- Subjects
chemistry.chemical_compound ,geography ,geography.geographical_feature_category ,chemistry ,Cave ,Geochemistry ,Carbonate ,Karst ,Geomorphology ,Geology - Abstract
Abstract In the Tarim basin of northwest China, large karst caves filled with oil and water have been found in Ordovician carbonate formation at depths exceeding 6,000 m. Sudden "bit drops" exceeding 10 m are not uncommon during drilling into such formation in the area, making logging data difficult to acquire. It is believed that wells drilled in the basin did not directly encounter with the caves but experienced high production are because of nearby caves. The well log data does not represent the productive reservoir. The relationship between reservoir properties and elastic parameters cannot be acquired from rock physics, reducing effectiveness of prestack inversion. The seismic reflection of karst caves is related to their size, shape, and content as well as the seismic signal to noisy ratio. Reservoir characterization using seismic techniques is a challenge. An innovative, integrated approach of four steps was taken to overcome this challenge. First, seismic reservoir interpretation from four levels of the target zone was performed based on the knowledge from drilling and the seismic data reprocessed with high fidelity and preserved amplitude. Then, seismic attributes were extracted along the interpreted horizons and the statistics of seismic attributes, which can represent the caves, were measured and evaluated. Next, well production was normalized for statistics on more than 20 production indicators (such as one-month, 6-month, and one-year oil equivalent). Finally, cross plots were made to find the relationship between seismic attributes with production indicators. Based on the results, fifty drilling targets were proposed and accepted by an operator. The integrated approach was verified based on drilling results. Introduction The study area is located in the west of the TaZhong area, Tarim basin, in China. Ordovician Karst reservoir is the target for oil exploration and production. Well-Driven-Seismic data reprocessing has improved the seismic images on caves and cave-fracture karst features. The seismic data used for the project has relative high fidelity. Prestack invertion was done using statistics wavelet as the sonic logs were not longer enough. The type of carbonate karst reservoirs is abundant, they consist mainly of tectonic fractures, diagenetic fractures, styloite, matrix porosity, dissolution porosity, and karst caves. Among them, the highly heterogeneous karst caves are the main resvervoir space for hydrocarbon accumulation. In seismic section, karst caves show as "a string of beads" (Figure 1), which is a vertical stack of positive amplitudes and negative amplitudes. From the seismic section we can see the length and magnitude of the strings of beads is different. This may be related to the cave size and shape. During the past few years, many studies including forward modeling have been carried out in Tarim basin. The relationship between the seismic attibutes and cave size, cave shape and content inside is complicated.
- Published
- 2014
31. Development Strategy Optimization and Application for Fractured-Vuggy Carbonate Gas Condensate Reservoirs
- Author
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Yong, Li, additional, Baozhu, Li, additional, Jing, Xia, additional, Xuelei, Zhang, additional, Xingliang, Deng, additional, Zhicheng, She, additional, and Zhiliang, Liu, additional
- Published
- 2016
- Full Text
- View/download PDF
32. Development Strategy Optimization and Application for Fractured-Vuggy Carbonate Gas Condensate Reservoirs (Russian)
- Author
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Yong, Li, primary, Baozhu, Li, additional, Jing, Xia, additional, Xuelei, Zhang, additional, Xingliang, Deng, additional, Zhicheng, She, additional, and Zhiliang, Liu, additional
- Published
- 2016
- Full Text
- View/download PDF
33. Simultaneous determination of 18 phenol pollutants in waste water by high performance liquid chromatography- tandem mass spectrometry
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Birong Luo, Yuanyuan Yu, Zhenwei Xie, Xingliang Deng, and Xu Wan
- Subjects
Pollutant ,Chromatography ,Chemistry ,General Chemical Engineering ,Organic Chemistry ,Tandem mass spectrometry ,Biochemistry ,High-performance liquid chromatography ,Analytical Chemistry ,chemistry.chemical_compound ,Wastewater ,Liquid chromatography–mass spectrometry ,Environmental chemistry ,Electrochemistry ,Phenol - Published
- 2016
34. Integrating Geological Characterization and Historical Production Analysis to Evaluate Interwell Connectivity in Tazhong1 Ordovician Carbonate Gas Field, Tarim basin
- Author
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Hedong, Sun, additional, YanMei, Xu, additional, Xingliang, Deng, additional, Jianfa, Han, additional, Ying, Shi, additional, Linlin, Lu, additional, and Wen, Cao, additional
- Published
- 2011
- Full Text
- View/download PDF
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