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- W2897242013 abstract "Cyclic CO 2 flooding is an efficient method to enhance oil recovery in ultralow permeability reservoirs. As the demand for low carbon economy development, co-optimization of CO 2 storage and utilization should be considered. In this research, initially a comprehensive optimization method was proposed, which co-optimize oil recovery and CO 2 storage by different weighting factors. Then, a series of core flooding experiments were performed using the core samples collected from Changqing oilfield, which is a ultralow permeability reservoir with heterogeneity and micro-cracks, CO 2 injection parameters of slug size and Injection-Soaking Time Ratio (ISR) were optimized. The results revealed that the optimal injection parameters changed for different optimization objectives. In the case where equal important to oil recovery and CO 2 storage were considered, the optimum CO 2 injection parameters in the ultralow permeability reservoirs were 0.03PV for slug size and 1:1 for ISR. Comparing the method of oil recovery optimization ( ω 1 = 1) to co-optimization of oil recovery and CO 2 storage ( ω 1 = ω 2 = 0.5), oil recovery was reduced by 8.93%, CO 2 storage was significantly increased by 25.85%. The results provide an insight into parameter optimization of CO 2 enhanced oil recovery design." @default.
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- W2897242013 date "2018-01-01" @default.
- W2897242013 modified "2023-10-10" @default.
- W2897242013 title "Co-optimization of oil recovery and CO<sub>2</sub> storage for cyclic CO<sub>2</sub> flooding in ultralow permeability reservoirs" @default.
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- W2897242013 doi "https://doi.org/10.2516/ogst/2018041" @default.
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