多层非均质油藏水驱油跨度界限实验研究
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摘要
基于岩心并联驱油实验方法,研究了不同埋深跨度、不同物性和埋深跨度组合以及调整注采参数对驱油效果的影响。结果表明:随着埋深跨度增加,层间压差的差异变大,浅层吸液能力受影响较小,中层次之,深层受影响程度最明显,通过提高埋深跨度可消除物性差异的影响;提高水驱注入强度,弱势储层启动,可提高总体采收率;根据水窜系数和驱油效率损失指标,明确了扶余油田目标区段合采开发时埋深跨度应控制的界限,从而克服层间干扰影响,优化层系开发。
Based on the experimental method of parallel rock cores displacement,it is studied that the influence of different buried depth span combining different physical property and the parameters of injection and extraction on the effect of oil displacement.The result shows that the interlayer pressure difference increases with the increase of depth span.The absorption capacity of the deep layer is the most obviously affected.while the shallow layer is the least affected.The effect of physical difference can be eliminated by increasing the depth of the buried span.Overall recovery rate increases with the increase of the injection strength and the start-up of the weak reservoir.According to the index of water channeling coefficient and displacement efficiency loss,it is clear that the embedded deep span should be controlled within the limitation in the development of target area in Fuyu oil field,to overcome the influence of interlayer interference and optimize the development of the layer system.
Based on the experimental method of parallel rock cores displacement,it is studied that the influence of different buried depth span combining different physical property and the parameters of injection and extraction on the effect of oil displacement.The result shows that the interlayer pressure difference increases with the increase of depth span.The absorption capacity of the deep layer is the most obviously affected.while the shallow layer is the least affected.The effect of physical difference can be eliminated by increasing the depth of the buried span.Overall recovery rate increases with the increase of the injection strength and the start-up of the weak reservoir.According to the index of water channeling coefficient and displacement efficiency loss,it is clear that the embedded deep span should be controlled within the limitation in the development of target area in Fuyu oil field,to overcome the influence of interlayer interference and optimize the development of the layer system.
引文
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[2]黄世军,康博韬,程林松,等.海上普通稠油油藏多层合采层间干扰定量表征与定向井产能预测[J].石油勘探与开发,2015,42(4):488-495.HUANG Shijun,KANG Botao,CHENG Linsong,et al.Quantitative characterization of interlayer interference and productivity prediction of directional wells in the multilayer commingled production of ordinary offshore heavy oil reservoirs[J].Petroleum Exploration&Development,2015,42(4):488-495.(in Chinese)
[3]YU Long,DONG Mingzhe,DING Boxin,et al.Experimental study on the effect of interfacial tension on the conformance control of oil-in-water emulsions in heterogeneous oil sands reservoirs[J].Chemical Engineering Science,2018,189:165-178.
[4]李明军,马勇新,杨志兴.纵向渗透率级差对注水井吸水特征的影响[J].断块油气田,2013,20(2):210-212.LI Mingjun,MA Yongxin,YANG Zhixing.Effects of vertical permeability contrast on water absorption in water injection well[J].Fault Block Oil&Gas Field,2013,20(2):210-212.(in Chinese)
[5]殷建,林鑫.特高含水期井间非均质模式对注水效果的影响[J].断块油气田,2012,19(2):191-194.YIN Jian,LIN Xin.Influence of interwell heterogeneity mode on water flooding effectiveness at high water cut stage[J].Fault Block Oil&Gas Field,2012,19(2):191-194.(in Chinese)
[6]王晓冬,刘慈群.分层合采油井产能分析[J].石油钻采工艺,1999,21(2):56-61.WANG Xiaodong,LIU Ciqun.Productivity analysis on commingled production wells[J].Oil Drilling&Production Technology,1999,21(2):56-61.(in Chinese)
[7]王代刚,胡永乐,孙静静.非均质油藏深部调驱技术数值模拟研究进展[J].特种油气藏,2015,22(3):8-13,151.WANG Daigang,HU Yongle,SUN Jingjing.Numerical simulation advances of in-depth profile control and displacement in heterogeneous reservoirs[J].Special Oil&Gas Reservoirs,2015,22(3):8-13,151.(in Chinese)
[8]王峙博,黄爱先,魏进峰.薄互层油藏层间干扰数值模拟研究[J].石油天然气学报,2012,34(9):247-250.WANG Zhibo,HUANG Aixian,WEI Jinfeng.Numerical simulation on interlayer interference of thin and interbed reservoirs[J].Journal of Oil and Gas Technology,2012,34(9):247-250.(in Chinese)
[9]沈瑞,赵芳,高树生,等.低渗透纵向非均质油层水驱波及规律实验研究[J].油气地质与采收率,2013,20(4):91-93,117.SHEN Rui,ZHAO Fang,GAO Shusheng,et al.Experimental study on rule of waterflooding sweep in low permeability vertical heterogeneous formations[J].Petroleum Geology and Recovery Efficiency,2013,20(4):91-93,117.(in Chinese)
[10]尤源,岳湘安,王锐,等.低渗透非均质油藏提高采收率实验研究[J].大庆石油地质与开发,2008,27(1):118-121,125.YOU Yuan,YUE Xiangan,WANG Rui,et al.Study of enhanced oil recovery lab in low permeable and heterogeneity reservoir[J].Petroleum Geology&Oilfield Development in Daqing,2008,27(1):118-121,125.(in Chinese)
[11]胡罡.多层油藏油井生产井段跨度界限研究[J].新疆石油地质,2012,33(1):72-74.HU Gang.Study on limitation of production well segment span in multi-layer reservoirs[J].Xijiang Petroleum Geology,2012,33(1):72-74.(in Chinese)
[12]胡罡.多层油藏生产井段跨度界限数值模拟研究[J].科学技术与工程,2012,12(3):676-678.HU Gang.The numerical simulation study on production technology policy limitation of segment span of production well in muti-layer reservoirs[J].Science Technology and Engineering,2012,12(3):676-678.(in Chinese)
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