Experimental Investigation on CO2 Injection in Block M
Experimental Investigation on CO2 Injection in Block M
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DOI：
10.1155/2018/8623020
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发表时间：
2018-06
影响因子：
3
通讯作者：
Peng Chen;Linlin Wang;Sidun Zhang;Junqiang Fan;Song Lu
中科院分区：
文献类型：
--
作者：
Peng Chen;Linlin Wang;Sidun Zhang;Junqiang Fan;Song Lu
本报告的目的是进行实验评价提高石油采收率（EOR）使用CO2注入。通过细管实验和PVT实验，确定了最小可渗透压力及相关的物理性质。结合长岩心驱替实验和核磁共振技术，模拟了CO2驱和CO2-水交替驱，评价了不同孔隙类型的驱油效率。结果表明，最小混相压力为32.6MPa，在当前地层压力下，CO2驱处于近混相状态。原油中CO2溶解度大，注CO2后原油膨胀能力强，有利于提高CO2采收率。CO2-水交替驱提高采收率比连续CO2驱提高3.97%，且在中小孔隙中的提高采收率明显高于连续CO2驱。这些结果将与M区块的未来发展相关。
The purpose of this report was to perform an experimental evaluation of enhanced oil recovery (EOR) using CO2 injection. A slim tube test and PVT experiment are used to determine the minimum miscibility pressure as well as a few related physical properties. Combined with a long core displacement experiment and nuclear magnetic resonance, CO2 flooding and CO2-water alternate flooding are simulated, and the displacement efficiency of different types of pores is evaluated. The results indicate that the minimum miscibility pressure is 32.6 MPa, and the CO2 flooding is at near-miscible conditions at the current formation pressure. The CO2 solubility of crude oil is large, and the crude oil has a strong expansion ability after the CO2 injection, which is beneficial for improving the recovery of CO2. The EOR of CO2-water alternate flooding is 3.97% higher than that of continuous CO2 flooding, and the EOR in the small and middle pores in the CO2-water alternate flooding is clearly higher. These results will be relevant for the future development of Block M.