摘要
针对苏德尔特油田下侏罗统兴安岭组油层水敏性强、注水开发效果差的实际情况,2011年优选B14区块开展了CO_2混相驱试验。实验室细管实验测试原油与CO_2的最小混相压力为16.6 MPa,比原始地层压力低1.0 MPa,可实现CO_2混相驱。矿场试验结果表明,实施CO_2混相驱后,注入能力明显提高,油井产量大幅上升,储集层动用程度增大,构造高部位和人工裂缝方向是受效的优势方向;CO_2混相驱能够为强水敏储集层有效补充能量,不失为改善开发效果和提高采收率的一种新方法。
In view of the actual situations such as strong water sensitivity and poor water injection effect of the Lower Jurassic Hinggan res-ervoir in Sudert oil field, the Block B14 was selected for miscible CO_2 flooding test in 2011. The obtained minimum miscible pressure ofcrude oil and CO_2 is 16.6 MPa from slim tube test in laboratory, 1.0 MPa lower than the original formation pressure, which indicates thatmiscible CO_2 flooding could be realized. The field test result shows after the implementation of miscible CO_2 flooding, the injectivity andthe oil production are significantly improved, the reservoir producing degree are increased and the structural high and artificial fracturestrikes are the predominant directions; miscible CO_2 flooding can replenish energy for strong water-sensitive reservoirs effectively, so it couldbe a new method to improve development effect and enhance oil recovery.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2016年第6期694-696,共3页
Xinjiang Petroleum Geology
基金
中国石油科技重大专项(2011E-1216)
关键词
海拉尔盆地
苏德尔特油田
CO2驱
CO2混相驱
试验研究
特低渗透油藏
强水敏储集层
Hailar basin
Sudert oilfield
CO_2 flooding
miscible CO_2 flooding
experimental study
ultra-low permeability reservoir
strong water-sensitive reservoir
