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Comprehensive Evaluation of Waterflooding Performance with Induced Fractures in Tight Reservoir: A Field Case
- Source :
- Geofluids, Vol 2021 (2021)
- Publication Year :
- 2021
- Publisher :
- Hindawi-Wiley, 2021.
-
Abstract
- Whether intentionally or unintentionally, waterflooding always takes place under fracturing condition in tight reservoir because of the extremely limited water absorption ability of the formation. Recently, we proposed a novel workflow, including real-time monitoring, formation testing analysis, and dynamic production analysis, to timely and effectively identify the initiation of waterflood-induced fractures (WIFs) and characterize the waterflooding behaviors for a well group. In this paper, we further provide a supplementary study to evaluate the waterflooding performance from the well group to the field basis. The utilization factor (UF) is first estimated on the basis of injection/production data by material balance theory, which provides an overall picture of water injection efficiency every year. Then, the areal (straightforwardly showed by water cut and formation pressure distributions) and vertical sweep (includes the water absorption in injectors and water breakthrough in producers) behaviors are studied to investigate the waterflooding characteristics and residual oil distributions. Lastly, three key influence factors are detailedly discussed: sand body connectivity, WIFs, and injection and production correspondence. Combining the previous work for the single well group, and the study in this paper to field basis, one can have a better and much more comprehensive understanding of the waterflooding performance and then thus take the corresponding adjustment measurements to improve waterflooding effectiveness.
- Subjects :
- QE1-996.5
Absorption of water
Article Subject
Petroleum engineering
Water injection (oil production)
Residual oil
Utilization factor
Geology
02 engineering and technology
010502 geochemistry & geophysics
01 natural sciences
Field (computer science)
Material balance
020401 chemical engineering
Water cut
Production analysis
General Earth and Planetary Sciences
Environmental science
0204 chemical engineering
0105 earth and related environmental sciences
Subjects
Details
- Language :
- English
- ISSN :
- 14688123 and 14688115
- Volume :
- 2021
- Database :
- OpenAIRE
- Journal :
- Geofluids
- Accession number :
- edsair.doi.dedup.....c7e960664d68314b19cb4d5007cfa0c0