Petroleum Reservoir Evaluation and Development >
2020 , Vol. 10 >Issue 6: 115 - 120
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2020.06.018
Experiments on CO2 flooding mechanism for Tahe sandstone reservoir with strong bottom water
Received date: 2020-02-18
Online published: 2021-01-07
In the later development stage of strong bottom water sandstone reservoir of Tahe Oilfield, the development effect of remaining oil between wells is poor, and the conventional EOR methods is inapplicable. In order to solve these problems, the feasibility of CO2 flooding in this type of reservoir has been explored. By combining laboratory experiments, numerical simulation and conventional reservoir engineering, the CO2 flooding mechanism for sandstone reservoir with strong bottom water has been studied, and the MMP of CO2 used in Tahe sandstone reservoir with strong bottom water is determined to be 29.6 MPa, the main mechanism of CO2 flooding is preliminarily defined to be such as swelling of oil and expansion of horizontal swept area, the dissolution and distribution ratio of CO2 in oil and water is about 4:1, and the CO2 flooding can increase the recovery by 12.5 %. All these show that CO2 flooding in Tahe sandstone reservoir with strong bottom water is feasible. The research results lay a theoretical foundation for EOR technology of this kind of reservoir and provide a scientific basis for CO2 flooding pilot test of Tahe bottom water sandstone reservoir.
Xueli LIU , Xiaojie ZHENG , Tao TAN , Lian DOU , Shuang XIE . Experiments on CO2 flooding mechanism for Tahe sandstone reservoir with strong bottom water[J]. Petroleum Reservoir Evaluation and Development, 2020 , 10(6) : 115 -120 . DOI: 10.13809/j.cnki.cn32-1825/te.2020.06.018
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