THE FIELD EXPERIMENT AND RESULTS ANALYSIS OF CO2 MISCIBLE DISPLACEMENT IN CAOSHE OILFIELD OF THE NORTH JIANGSU BASIN
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摘要: 苏北盆地草舍油田泰州组油藏为复杂小断块油藏,水驱采收率仅32%。该文通过将CO2混相驱油室内试验和数值模拟结果与矿场试验相结合,进行了开采效果的理论和实际分析与对比。室内试验和数值模拟结果研究表明,采用CO2混相驱可以使该油藏采收率达到47%,比水驱油的方式提高15%。2005年7月至2009年12月,草舍油田泰州组油藏已累计注入CO2气5 842×104m3,增产原油3×104t,提高采收率2%,取得了显著的增产效果。因此,CO2混相驱油是有效的三次采油方法,对复杂断块油藏开展三次采油具有重要借鉴价值。Abstract: The Taizhou Fm reservoir in Caoshe Oilfield of the North Jiangsu Basin is a complicated and small fault block reservoir,its oil recovery by water displacement is only 32%.Combinating the laboratory and simulation results on CO2 miscible displacement and field experiment,the theorical and pratical analysis and contrast of oilfield development are accomplished.The oil recovery of this reservoir could be enhanced upto 47% according to results of laboratory experiment and numerical simulation,and higer 15% than water drive.From May 2005 to Dec.2009,the field experiment of CO2 miscible displacement has been finished in Taizhou Fm reservoir of Caoshe Oilfield,the cumulative amount of CO2 gas flooding is upto 5 842×104m3,the production of crude oil is increased 3×104t,the oil recovery is enhanced 2%.CO2 miscible displacement is an effective method of enhancing oil recovery,which has important reference value on tertiary oil recovery in complicated and fault block reservoirs.
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[1] ORR F M JR,YU A D,LIEN C L.Phase behavior of CO2and crude oil in low temperature reservoirs[J].SPE Journal,1981,21(4):480-492. [2] SIMON R,ROSMAN A,ZANA E.Phase-behavior properties of CO2-reservoir oil systems[J].SPE Journal,1978,18(1):20-26. [3] 赵明国,王东.大庆油田芳48断块CO2吞吐室内实验[J].油气地质与采收率,2008,15(2):89-91. [4] 郭平,李苗.低渗透砂岩油藏注CO2混相条件研究[J].石油与天然气地质,2007,28(5):687-692. [5] 程杰成,朱维耀,姜洪福.特低渗透油藏CO2驱油多相渗流理论模型研究及应用[J].石油学报,2008,29(2):246-251. [6] 郝永卯,薄启炜,陈月明.CO2驱油实验研究[J].石油勘探与开发,2005,32(2):110-112. [7] 宋道万.二氧化碳混相驱数值模拟结果的主要影响因素[J].油气地质与采收率,2008,15(4):72-74. [8] 马涛,汤达帧,蒋平,等.注CO2提高采收率技术现状[J].油田化学,2007,24(4):379-383. [9] 沈平平,黄磊.二氧化碳-原油多相多组分渗流机理研究[J].石油学报,2009,30(2):247-251. [10] 沈平平,袁士义,韩冬,等.中国陆上油田提高采收率潜力评价及发展战略研究[J].石油学报,2001,22(1):45-49. [11] 吴志良,张勇,唐人选,等.复杂断块油田CO2驱油动态监测技术应用与分析[J].石油实验地质,2009,31(5):542-546. [12] 祝春生,程林松.低渗透油藏CO2驱提高原油采收率评价研究[J].钻采工艺,2007,30(6):55-57. [13] 郝永卯,陈月明,于会利.CO2驱最小混相压力的测定与预测[J].油气地质与采收率,2005,12(6):64-66. [14] 孙业恒,吕广忠,王延芳,等.确定CO2最小混相压力的状态方程法[J].油气地质与采收率,2006,13(1):82-84. -
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