吴壮坤,张宏录,池宇璇. 苏北页岩油二氧化碳强压质换技术研究与现场试验[J]. 石油钻探技术,2024,52(0):1-7. 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研究与现场试验[J]. 石油钻探技术,2024,52(0):1-7. DOI: 10.11911/syztjs.2024074
WU Zhuangkun, ZHANG Honglu, CHI Yuxuan. Research and Field Fest on Carbon Dioxide Forced Pressure Quality Exchange Technology of Shale Oil in Northern Jiangsu Province[J]. Petroleum Drilling Techniques, 2024, 52(0):1-7. DOI: 10.11911/syztjs.2024074
Citation: WU Zhuangkun, ZHANG Honglu, CHI Yuxuan. Research and Field Fest on Carbon Dioxide Forced Pressure Quality Exchange Technology of Shale Oil in Northern Jiangsu Province[J]. Petroleum Drilling Techniques, 2024, 52(0):1-7. DOI: 10.11911/syztjs.2024074

苏北页岩油二氧化碳强压质换技术研究与现场试验

Research and Field Fest on Carbon Dioxide Forced 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,降低油藏递减率,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室内试验,研究了CO2注入压力与提高原油采收率的关系、CO2注入量与提高原油采收率的关系;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优化,并进行了SD1J井注超大量二氧化碳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下降到30.3 t/d,产油量由14.0 t/d上升到29.2 t/d,含水由63.8%下降为3.5%。研究表明,二氧化碳强压质换技术能够提高页岩油藏地层能量和降低油藏递减率,为提高页岩油藏的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 reservoir in northern Jiangsu Province, reduce the decline rate of oil reservoir and improve the recovery rate of shale oil, the study and field test of CO2 high pressure quality exchange technology of shale oil in northern Jiangsu Province were carried out. The relationship between CO2 injection pressure and enhanced oil recovery (EOR) and the relationship between CO2 injection amount and enhanced oil recovery (EOR) was studied by using simulated formation conditions of shale reservoir core in northern Jiangsu. Numerical simulation software is used to optimize the injection time, injection volume, injection speed and braising time of SD1J well, which provides a theoretical basis for SD1J well CO2 high pressure quality replacement technology. The feasibility of CO2 high pressure quality replacement technology was further verified by SD1J well field test. In 2022, the first field test of superlarge amount of carbon dioxide injection forced pressure quality replacement technology was carried out in SD1J well in China. After the measure, the well produced normally, the daily fluid production decreased from 38.6t/d to 30.3t/d, the daily oil production increased from 14t/d to 29.2t/d, and the water content decreased from 63.8% to 3.5%. The field test of SD1J well shows that carbon dioxide forced pressure mass replacement technology is an important means to increase formation energy of shale reservoir and reduce the decline rate of shale reservoir, which provides a new technical support for improving the development effect of shale reservoir in China.

     

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