吴壮坤,张宏录,池宇璇. 苏北页岩油二氧化碳强压质换技术[J]. 石油钻探技术,2024,52(4):87-93. DOI: 10.11911/syztjs.2024074
引用本文: 吴壮坤,张宏录,池宇璇. 苏北页岩油二氧化碳强压质换技术[J]. 石油钻探技术,2024,52(4):87-93. DOI: 10.11911/syztjs.2024074
WU Zhuangkun, ZHANG Honglu, CHI Yuxuan. CO2 high pressure quality exchange technology of shale oil in northern Jiangsu Province [J]. Petroleum Drilling Techniques, 2024, 52(4):87-93. DOI: 10.11911/syztjs.2024074
Citation: WU Zhuangkun, ZHANG Honglu, CHI Yuxuan. CO2 high pressure quality exchange technology of shale oil in northern Jiangsu Province [J]. Petroleum Drilling Techniques, 2024, 52(4):87-93. DOI: 10.11911/syztjs.2024074

苏北页岩油二氧化碳强压质换技术

CO2 High Pressure Quality Exchange Technology of Shale Oil in Northern Jiangsu Province

  • 摘要: 为了保持苏北页岩油藏能量,降低产量递减率,提高页岩油藏采收率,研究了苏北页岩油CO2强压质换技术。采用苏北页岩油藏岩心进行了室内试验,分析了CO2注入压力、焖井时间对原油采出程度的影响,CO2注入量对原油采收率的影响;采用数值模拟软件,进行了SD1J井注入时机、注入量、注入速度及焖井时间的优化,并进行了SD1J井注超大量CO2强压质换技术现场试验。SD1J井措施后自喷正常生产,产液量由38.6 t/d降至30.3 t/d,产油量由14.0 t/d升至29.2 t/d,含水率由63.8%降至3.5%。研究表明,CO2强压质换技术能够提高页岩油藏地层能量和降低产量递减率,为提高页岩油藏开发效果提供了一种新的技术途径。

     

    Abstract: In order to maintain the energy of shale oil reservoirs in northern Jiangsu Province, reduce the decline rate of production, and improve the recovery rate of shale oil reservoirs, the study on CO2 high pressure quality exchange technology of shale oil in northern Jiangsu Province were carried out. The effects of CO2 injection pressure and soaking time on crude oil recovery percent and CO2 injection rate on crude oil recovery factor were analyzed by using shale oil reservoir cores in northern Jiangsu Province for laboratory experiments. Numerical simulation software was used to optimize the injection time, injection volume, injection rate, and shut-in time of Well SD1J. A field test of high pressure quality exchange technology with a super large volume of CO2 was carried out in Well SD1J. After the measure implementation, the well produced oil normally. The daily fluid production decreased from 38.6 t/d to 30.3 t/d, and the daily oil production increased from 14.0 t/d to 29.2 t/d. The water content decreased from 63.8% to 3.5%. The results show that CO2 high pressure quality exchange technology can increase the formation energy of shale oil reservoirs and reduce the decline rate of production, which provides new technical support for improving the development effect of shale oil reservoirs.

     

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