16 results on '"Luo, Houyong"'
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2. Natural gas origin of Langgu Sag in Jizhong Depression, Bohai Bay Basin: Insight from hydrous pyrolysis experiments of gold tube
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Chen, Xiaoyan, Liu, Wenhui, Cao, Yijun, Yin, Jie, Guo, Liuxi, Wang, Xiaofeng, Zhang, Dongdong, Zhang, Jie, and Luo, Houyong
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- 2022
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3. Characteristics and controlling factors of pore structure of the Permian shale in southern Anhui province, East China
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Cao, Taotao, Deng, Mo, Song, Zhiguang, Luo, Houyong, and Hursthouse, Andrew S.
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- 2018
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4. Formation time of gas reservoir constrained by the time-accumulation effect of 4He: Case study of the Puguang gas reservoir
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Liu, Wenhui, Tao, Cheng, Borjigin, Tenger, Wang, Jie, Yang, Huamin, Wang, Ping, Luo, Houyong, and Zhai, Changbo
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- 2017
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5. Significance of gypsum-salt rock series for marine hydrocarbon accumulation
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Liu, Wenhui, Zhao, Heng, Liu, Quanyou, Zhou, Bing, Zhang, Dianwei, Wang, Jie, Lu, Longfei, Luo, Houyong, Meng, Qingqiang, and Wu, Xiaoqi
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- 2017
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6. New knowledge of hydrocarbon generating theory of organic matter in Chinese marine carbonates
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LIU, Wenhui, BORJIGIN, Tenger, WANG, Xiaofeng, LI, Maowen, HU, Guang, WANG, Jie, LU, Longfei, ZHAO, Heng, CHEN, Qianglu, and LUO, Houyong
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- 2017
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7. Pore system characteristics of the Permian transitional shale reservoir in the Lower Yangtze Region, China
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Cao, Taotao, Song, Zhiguang, Luo, Houyong, Zhou, Yuanyuan, and Wang, Sibo
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- 2016
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8. Modulating and modeling aggregation of cell-seeded microcarriers in stirred culture system for macrotissue engineering
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Mei, Yang, Luo, Houyong, Tang, Qiang, Ye, Zhaoyang, Zhou, Yan, and Tan, Wen-Song
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- 2010
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9. Fabrication of three-dimensional poly(ε-caprolactone) scaffolds with hierarchical pore structures for tissue engineering
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Zhang, Qingchun, Luo, Houyong, Zhang, Yan, Zhou, Yan, Ye, Zhaoyang, Tan, Wensong, and Lang, Meidong
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POLYCAPROLACTONE , *MICROFABRICATION , *TISSUE scaffolds , *MOLECULAR structure , *TISSUE engineering , *PROPERTIES of matter , *MICROSTRUCTURE - Abstract
Abstract: The physical properties of tissue engineering scaffolds such as microstructures play important roles in controlling cellular behaviors and neotissue formation. Among them, the pore size stands out as a key determinant factor. In the present study, we aimed to fabricate porous scaffolds with pre-defined hierarchical pore sizes, followed by examining cell growth in these scaffolds. This hierarchical porous microstructure was implemented via integrating different pore-generating methodologies, including salt leaching and thermal induced phase separation (TIPS). Specifically, large (L, 200–300μm), medium (M, 40–50μm) and small (S, <10μm) pores were able to be generated. As such, three kinds of porous scaffolds with a similar porosity of ~90% creating pores of either two (LS or MS) or three (LMS) different sizes were successfully prepared. The number fractions of different pores in these scaffolds were determined to confirm the hierarchical organization of pores. It was found that the interconnectivity varied due to the different pore structures. Besides, these scaffolds demonstrated similar compressive moduli under dry and hydrated states. The adhesion, proliferation, and spatial distribution of human fibroblasts within the scaffolds during a 14-day culture were evaluated with MTT assay and fluorescence microscopy. While all three scaffolds well supported the cell attachment and proliferation, the best cell spatial distribution inside scaffolds was achieved with LMS, implicating that such a controlled hierarchical microstructure would be advantageous in tissue engineering applications. [Copyright &y& Elsevier]
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- 2013
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10. Genetic significance of carbon isotope curve types of methane, ethane, and propane in natural gas.
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Pei, Lixin, Liu, Wenhui, Guo, Qiang, Wang, Xiaofeng, Luo, Houyong, and Wang, Qingtao
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NATURAL gas , *CARBON isotopes , *SEDIMENTARY basins , *PROPANE , *ETHANES , *METHANE , *ORGANIC geochemistry - Abstract
• The carbon isotope curve index (CICI) summarizes the isotope ratios of C 1 - C 3. • Carbon-isotope curves can be divided into Convex, Linear, Concave and Reversed. • In Normal-type gas, leakage and preferential propane biodegradation increase CICI. • In Normal-type gas, migration and mixing with microbial methane decrease CICI. The carbon isotope curve (δ13C n versus 1/n) is often used to evaluate the origin and secondary alteration of hydrocarbon gases, but the factors that influence the carbon isotope curve are not fully understood, limiting its practical application. We define a carbon isotope curve index (CICI) to quantitatively characterize the curve type. Four general curve types are defined: a Normal (δ13C 1 < δ13C 2 < δ13C 3) type and three Reversed types consisting of R 1 (δ13C 1 > δ13C 2 > δ13C 3), R 2 (δ13C 1 < δ13C 2 > δ13C 3), and R 3 (δ13C 1 > δ13C 2 < δ13C 3). CICI is defined as arctan (3Δ13C 3-2 /Δ13C 2-1) × 180/π for Normal and R 2 , –180 + arctan (3Δ13C 3-2 /Δ13C 2-1) × 180/π for R 1 , and 180 + arctan (3Δ13C 3-2 /Δ13C 2-1) × 180/π for R 3. CICI ranges from 0 to 90 for Normal, –180 to –90 for R 1 , –90 to 0 for R 2 , and 90 to 180 for R 3. Normal gases can be divided into three categories: Linear (CICI = 45), Convex (CICI 0 to < 45), and Concave (CICI > 45 to 90). The influence of kerogen type and maturity on CICI is investigated by comparing thermogenic gases generated from different kerogens in both sedimentary basins and pyrolysis experiments. Curves for low-maturity lacustrine and low-to-high-maturity coal gases are mainly Convex. In contrast, curves for high maturity to overmature marine gases are more Concave. The curve type of thermogenic gas changes from Convex to Concave with increasing maturity, and the mixing of gases generated from kerogen-cracking and oil-cracking results in the Concave type. The effect of post-generation alteration processes on CICI was elucidated using data from three field studies. In Normal-type gas, preferential biodegradation of propane and leakage increase CICI, while migration and mixing with microbial methane decrease CICI. Preferential biodegradation of propane and leakage are two other reasons for the Concave type. [ABSTRACT FROM AUTHOR]
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- 2023
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11. Study of thermochemical sulfate reduction of different organic matter: Insight from systematic TSR simulation experiments.
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Zhao, Heng, Liu, Wenhui, Borjigin, Tenger, Zhang, Jianyong, Luo, Houyong, and Wang, Xiaofeng
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SULFATES , *ANHYDRITE , *THERMOCHEMISTRY , *HYDROCARBONS , *ALIPHATIC hydrocarbons , *SIMULATION methods & models - Abstract
Abstract A series of thermochemical sulfate reduction (TSR) simulation experiments were carried out involving different organic matter (crude oil, solid bitumen, type II kerogen, type III kerogen) and different sulfate species (anhydrite and MgSO 4) to address the chemical and carbon isotopic variations of the hydrocarbon, H 2 S and CO 2. The increase of main peak carbons of residual saturated hydrocarbon and the decrease of gaseous hydrocarbons from control treatment to corresponding sulfate treatments suggest that TSR promote the consumption of both liquid and gaseous hydrocarbons. The δ13C 1 -3 values generally shift positively from control treatment to sulfate treatments and the (δ13C ethane -δ13C methane) values in sulfate treatments are higher than that in control treatments. The variation of δ13C 1 -3 in TSR is controlled by the isotope fractionation during the generation and consumption of C 1 -3 in TSR. MgSO 4 is more reactive than anhydrite in TSR. A certain amount of H 2 S is incorporated into solid bitumen as the result of secondary alteration. We believe that the reactivity order of different organic matter in TSR is crude oil > solid bitumen > type II kerogen > type III kerogen. The reactivity of organic matter in TSR depends on the hydrocarbon generation kinetics of each organic matter. The dissolution/decomposition and precipitation of carbonate control the yield of CO 2 in sour reservoirs. The negative shift of δ13CO 2 with increasing TSR extent is mainly due to the inheritance effect of carbon isotope from hydrocarbons. Inorganic CO 2 sourced from the thermal decomposition or acid dissolution of carbonate mineral impose significant influence on δ13CO 2. The H 2 S yields decrease with CH 4 yields and increase with δ13CH 4 value, the δ13CH 4 values increase with residual amount of gaseous alkane (1- H 2 S/(residual alkane + H 2 S)), suggesting that methane acted as reactant in TSR. The (δ13CO 2 -δ13CH 4) values decrease significantly with increasing temperature, and the δ13CO 2 is even more negative than δ13CH 4 in 450 °C MgSO 4 treatments involving type II and type Ⅲ kerogen. Accordingly, methane acted as a predominant reactant in 450 °C sulfate treatments in our experiment. It is possible for natural gas with high gas dryness to experience methane-dominated TSR in geological reservoirs. Highlights • Organic matter type imposes significant influence on TSR. • Dissolution and precipitation of carbonate control CO 2 yield in TSR. • δ 13CO 2 shift negatively with increasing TSR extent due to the inheritance of 13C/12C. • Methane can act as predominant reactant in TSR. [ABSTRACT FROM AUTHOR]
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- 2019
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12. Application of noble gas geochemistry to the quantitative study of the accumulation and expulsion of lower Paleozoic shale gas in southern China.
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Wang, Xiaofeng, Liu, Wenhui, Li, Xiaobin, Tao, Cheng, Borjigin, Tenger, Liu, Peng, Luo, Houyong, Li, Xiaofu, and Zhang, Jiayu
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SHALE gas , *OIL shales , *PALEOZOIC Era , *NATURAL gas , *QUANTITATIVE research , *NOBLE gases , *KRYPTON - Abstract
The noble gases He and Ar are trace components in natural gas. Although their genesis is significantly different from that of hydrocarbon gases, they can provide key information on the accumulation and preservation of natural gas. In this paper, the relative and absolute abundances of He and Ar in lower Paleozoic shale gas samples from different areas of southern China were systematically analyzed, and the relationships between the concentrations of noble gases and the accumulation and expulsion of shale gas were evaluated. The evolution of He and Ar concentrations in shale gas system can be divided into three phases: the early accumulation stage, the hydrocarbon dilution stage and the preservation and enrichment stage. The generation of a large amounts of methane in the shale leads to the lowest relative concentrations of He and Ar in the hydrocarbon dilution stage. After that, the tectonic uplift causes the partial loss of the shale gas, and methane is no longer generated, but He and Ar are still produced. The concentrations of He and Ar present in shale gas are mainly controlled by the conditions of the preservation and enrichment stage. Tectonic uplift is the main reason for the loss of shale gas, and later uplift often results in higher gas content, which also leads to relatively low concentrations of He and Ar. The absolute abundance of residual Ar atm and the He/Ar ratio of a shale gas can indirectly reflect the preservation conditions of that shale gas. • No evidence was found of external sources of He or Ar in the shale gas systems. • The relative abundances of He and Ar can reflect the accumulation and expulsion process of the shale gas. • The He/Ar ratio is related to the time available for diffusion and the sealing capabilities of the shale system. [ABSTRACT FROM AUTHOR]
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- 2022
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13. Hydrous pyrolysis of different kerogen types of source rock at high temperature-bulk results and biomarkers.
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Liang, Mingliang, Wang, Zuodong, Zheng, Jianjing, Li, Xiaoguang, Wang, Xiaofeng, Gao, Zhandong, Luo, Houyong, Li, Zhongping, and Qian, Yu
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HYDROUS , *HIGH temperatures , *PYROLYSIS , *BIOMARKERS , *KEROGEN , *HYDROCARBON analysis - Abstract
Abstracts Hydrous pyrolysis experiments were conducted on immature petroleum source rocks containing different types of kerogen (I and II) at a temperature range of 250–550 °C to investigate the role of kerogen type in petroleum formation at high temperature. At temperatures less than 350 °C, the bulk results and biomarker compositions were quite similar and show negligible variations for different kerogen types. However, at high-temperature, above 400 °C (400–550 °C), unexpected results were observed. The initial and peak temperature of the hydrocarbon generation of type II sources rocks is lower than the type I. The tricyclic terpenes were common in samples above 400 °C. The T s / T m values did not show a linear relationship with the temperature increase. The C 31 22 S /( S + R ) values did not show significant change with temperature increase. However, a good correlation between the sterane maturity parameters and the thermal maturity were shown, especially for type I kerogen. Temperature increase resulted in significant variation in the relative contents of C 27 , C 28 and C 29 steranes, suggesting that the distribution of steranes is greatly affected by thermal maturity. [ABSTRACT FROM AUTHOR]
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- 2015
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14. Origin, accumulation and secondary alteration of natural gas around Qingshui Sub-sag, Liaohe Depression, China: Insights from molecular and isotopic composition.
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Pei, Lixin, Wang, Xiaofeng, Wang, Qingtao, Zhang, Qian, Luo, Houyong, and Liu, Wenhui
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NATURAL gas , *GAS migration , *PROSPECTING , *CARBON isotopes - Abstract
Fourteen gases and their associated oils were collected at the surface from production wells in the Shahejie Formation, Dongying Formation, and Archean in six zones around the Qingshui Sub-sag of the Liaohe Depression, Bohai Bay Basin. The molecular compositions and carbon and hydrogen isotopic compositions of natural gas were measured. The origin, migration, accumulation, and secondary alteration of natural gas were studied based on the lateral and vertical comparison of natural gas geochemical characteristics. The natural gases include humic-type (δ13C 2 > −29.0‰, δ13C 1 > −43.0‰), sapropelic-type (δ13C 2 < −29.0‰, δ13C 1 > −43.0‰), and secondary microbial (δ13C 1 of −48.5‰, C 1 /(C 2 +C 3) of 46.3, δ13CO 2 of −1.5‰) gases. The humic-type and sapropelic-type gases were derived from the source rocks in the third and fourth members of the Shahejie Formation, respectively. The humic-type gases dominate. The biodegradation level of natural gas in the study area varies, and biodegraded gases are characterized by high Δ13C(C 3 –C 2), low C 3 /C 2 , and low C 3 /iC 4 and are associated with biodegraded oils. The vertical migration of natural gas in the west and east of the Qingshui Sub-sag is limited. There are good additional exploration prospects for humic-type gas, derived from high-maturity source rocks of the third member of the Shahejie Formation in the deep layers (depth >4.5 km) of the Qingshui Sub-sag. Secondary microbial gas is a potential exploration target in the shallow layers (depth <2.5 km). • Humic-type gas is from the source rock of the 3rd member of Shahejie Formation. • Sapropelic-type gas is from the source rock of the 4th member of Shahejie Formation. • Biodegraded gas: 13C-rich propane, depletion of propane and n-butane. • Secondary microbial gas: 13C-rich carbon dioxide and 13C-depleted methane. • Natural gas mainly accumulates near the source rock. [ABSTRACT FROM AUTHOR]
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- 2022
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15. Potential causes of depleted δ13Ccarb excursions in Ordovician marine carbonates, Ordos Basin, China.
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Li, Yining, Liu, Wenhui, Wang, Xiaofeng, Jing, Xianghui, Liu, Peng, Zhang, Dongdong, Luo, Houyong, Wang, Qingtao, Pei, Lixin, and Zhai, Guanghui
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CARBONATES , *NATURAL gas prospecting , *CARBONATE rocks , *GAS wells , *GAS reservoirs , *ORGANIC compounds - Abstract
Variations in the stable carbon isotope signature of marine carbonate rocks (δ13C carb) are utilized as an indicator for changes in depositional environment and tracers of diagenetic alteration. Various petrologic (textural changes) and geochemical indicators (trace elements) have been used to evaluate the effect of diagenetic alteration on the δ13C carb signature. However, how diagenetic processes involving interactions between organic matter and minerals impact the δ13C carb records of marine carbonate rocks has not been investigated thoroughly. In this study, systematic stable carbon (δ13C carb) and oxygen (δ18O carb) isotope analyses were conducted on marine carbonates from the Middle Ordovician Majiagou Formation in the Ordos Basin, China to evaluate secondary overprint of the primary δ13C carb record. 496 carbonate samples from the gas reservoir (potential gas source rock) were selected from one well located in the natural gas exploration target—mid-east part of the Ordos Basin. A depleted δ13C carb excursion (i.e., a shift to more negative values) occurred in the 100 m-thick anhydrite-bearing carbonate sequence of this formation. The δ13C carb and δ18O carb values for the whole rock vary from −10.9‰ to 1.8‰ and −11.5‰ to −4.0‰, respectively. The calcite veins and vug-filling calcites also have depleted carbon isotope signature ranging between −21.1‰ and −4.4‰. The secondary calcites observed under the microscope were generated by the conversion from isotopically depleted organic matter and resulted in the depleted δ13C carb signature. The commonly occurring thermochemical sulfate reduction in the study area and the degradation of potentially enriched carboxylic acid salts in anhydrite-bearing carbonate setting are major factors contributing to the depleted δ13C carb values. The conversion from organic carbon to inorganic carbon through organic matter-involved diagenetic processes plays a significant role in explaining the genesis of depleted δ13C carb excursions in deeply buried marine carbonate sequences. [Display omitted] • High-amplitude depleted δ13C carb signatures were first found to occur in the Middle Ordovician carbonate sequence. • Diagenetic processes involving organic matter impacted the original δ13C carb record. • Organic-origin calcites generated by TSR resulted in the depleted δ13C carb signatures. [ABSTRACT FROM AUTHOR]
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- 2021
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16. Hydrocarbon generation from calcium stearate: Insights from closed-system pyrolysis.
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Wang, Qingtao, Liu, Wenhui, Pei, Lixin, Cai, Zhenghong, Luo, Houyong, Wang, Xiaofeng, Zhang, Dongdong, and Liu, Jinzhong
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INORGANIC compounds , *CALCIUM , *SULFATE pulping process , *ORGANIC compounds , *HYDROCARBONS , *GEOLOGICAL carbon sequestration - Abstract
The total organic carbon of carbonate sediments includes a 5%–45% contribution from acid-soluble organic matter, particularly carboxylic acid salts. However, there is little information available on hydrocarbon generation from carboxylic acid salts. The objectives of this study were to investigate the extent and timing of hydrocarbon generation from calcium stearate. Thus, gold-tube nonhydrous pyrolysis experiments of calcium stearate were conducted from 250 to 600 °C at 50 MPa. Infrared spectroscopy and δ13C testing were also performed on solid pyrolysate and gaseous products, respectively, to trace changes of functional groups and stable carbon isotopes. Pyrolysis of calcium stearate produced hydrocarbons, CO 2 , CaO, CaCO 3 , coke, and other inorganic compounds of low molecular weight. A Van Krevelen diagram indicated that calcium stearate falls in the same region as hydrogen-rich type I kerogen. The maximum yield of methane generated from calcium stearate was as high as that from North Sea oil. Hydrocarbon generation from calcium stearate was related to cracking of the alkyl moiety and similar to that occurring in pyrolysis of n- C 18. As a consequence of kinetic carbon isotope fractionation, with increasing temperature CO 2 becomes enriched in 13C and CaCO 3 becomes enriched in 12C. Notably, CaCO 3 with very low δ13C values is probably an effective proxy indicating hydrocarbon generation from carboxylic acid salts, if no other CaCO 3 is produced via thermochemical sulphate reduction processes. The optimized kinetic parameters demonstrate that calcium stearate had higher methane generation activation energies than those of n -C 18 and type I kerogen. Hence, methane generation from calcium stearate is delayed when extrapolated to geological conditions. This retarded methane generation illustrates the vital role of carboxylic acid salts in the generation of deep oil and gas. Future research should concern the abundance of carboxylic acid salts in carbonate formations and the depositional environments that facilitate the formation of carboxylic acid salts. • Closed gold-tube pyrolysis of calcium stearate was conducted. • Calcium stearate had gas potential as high as crude oil. • Negative δ13C CaCO3 may indicate hydrocarbon generation from carboxylic acid salts. • Methane generation from calcium stearate was behind that of n- C 18. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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