LAPSE:2023.36745
Published Article
LAPSE:2023.36745
Enhanced Oil Recovery and CO2 Storage Performance in Continental Shale Oil Reservoirs Using CO2 Pre-Injection Fracturing
An Zhang, Yalin Lei, Chenjun Zhang, Jiaping Tao
September 21, 2023
CO2 pre-injection fracturing is a promising technique for the recovery of continental shale oil. It has multiple advantages, such as oil recovery enhancement, CO2 geological storage and water consumption reduction. Compared with conventional CO2 huff and puff and flooding, CO2 pre-injection features higher injection rates and pressures, leading to EOR and improved CO2 storage performance. Combining physical experiments and numerical simulation, this research systematically investigated the EOR and storage performance of CO2 pre-injection in continental shale reservoirs. The results showed that CO2 pre-injection greatly improved the oil recovery; after seven cycles of soaking, the average oil recovery factor was 39.27%, representing a relative increase of 31.6% compared with that of the conventional CO2 huff and puff. With the increasing pressure, the CO2 solubility grew in both the oil and water, and so did the CO2 adsorption in shale. Numerical simulation indicated that the average CO2 storage ratio of the production stage was 76.46%, which validated the effectiveness of CO2 pre-injection in terms of CO2 geological storage.
Keywords
carbon neutrality, CO2 pre-injection, CO2 storage, enhanced oil recovery (EOR), shale oil
Suggested Citation
Zhang A, Lei Y, Zhang C, Tao J. Enhanced Oil Recovery and CO2 Storage Performance in Continental Shale Oil Reservoirs Using CO2 Pre-Injection Fracturing. (2023). LAPSE:2023.36745
Author Affiliations
Zhang A: School of Economics and Management, China University of Geosciences, Beijing 100083, China; Key Laboratory of Carrying Capacity Assessments for Resources and Environment, Ministry of Natural Resources of the People’s Republic of China, Beijing 100083, C
Lei Y: School of Economics and Management, China University of Geosciences, Beijing 100083, China; Key Laboratory of Carrying Capacity Assessments for Resources and Environment, Ministry of Natural Resources of the People’s Republic of China, Beijing 100083, C
Zhang C: PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
Tao J: PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China [ORCID]
Journal Name
Processes
Volume
11
Issue
8
First Page
2387
Year
2023
Publication Date
2023-08-08
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr11082387, Publication Type: Journal Article
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LAPSE:2023.36745
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doi:10.3390/pr11082387
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Sep 21, 2023
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Sep 21, 2023
 
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Calvin Tsay
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