石油工程
提高采收率
水驱
致密油
环境科学
含水率
洪水(心理学)
注水(采油)
体积热力学
地质学
心理学
量子力学
物理
古生物学
油页岩
心理治疗师
作者
Haiyang Yu,Zhenhua Rui,Zhewei Chen,Xin Lü,Zhonglin Yang,Junhui Liu,Xuefeng Qu,Shirish Patil,Kegang Ling,Jun Lu
出处
期刊:Energy
[Elsevier]
日期:2019-09-01
卷期号:182: 135-147
被引量:44
标识
DOI:10.1016/j.energy.2019.06.024
摘要
For unconventional reservoirs, water flooding performs poorly because of low displacement efficiency; gas flooding shows limited enhanced oil recovery (EOR) capability due to gas breakthrough. Carbonated water injection (CWI) and active CWI (ACWI) are promising EOR methods which combine advantages of water and gas flooding. This paper provides experimental and numerical studies of carbonated water and surfactant injection based on a case study in Changqing Oilfield, China, which is the first time to investigate the feasibility of CWI and ACWI for tight oil reservoirs. This study compares performances of active water injection (AWI), CWI, Water altering gas (WAG), and ACWI. Experimental results reveal that the oil recovery of CWI is 2.7% more than WAG. ACWI achieves the highest incremental oil recovery (9.43%) among four methods. The sensitivity analyses of ACWI + WAG is further implemented experimentally, which demonstrates that ACW as a pre-flood improves 7% of oil recovery during WAG process. For Changqing tight reservoir cores, the optimal injection volume of ACW is 0.8 pore volume. Numerical simulations are conducted to validate the capability of cubic Equation-of-State coupled with Henry's law (EOS/H model) for CWI in tight oil reservoirs, indicating EOS/H model is applicable to correlate phase behavior of carbonated water and oil system. This paper, for the first time, investigates the EOR performance of ACWI in tight oil reservoirs. These results explore the feasible application of using CWI/ACWI in tight oil reservoir development.
科研通智能强力驱动
Strongly Powered by AbleSci AI