淡水驱替过程中岩石电性实验研究Experimental study on rock electricity in the course of fresh water flooding
俞军,王伟男,耿昕,杨芳
YU Jun~(1,2),WANG Wei-nan~2,GEGN Xin~2
摘要(Abstract)：
润湿性是影响储层岩石电阻率的重要因素。实验研究了不同润湿性的岩心淡水驱替过程中岩石电阻率随含水饱和度的变化规律,揭示了油层水淹后不同润湿性岩石的导电机理。实验结果显示水润湿岩心淡水驱替后,随含水饱和度变化电阻率变化曲线呈"U"型或"L"型,亲油岩心电阻率变化曲线呈单调下降趋势。岩石电阻率变化受储层原始润湿性影响。研究结果可为不同润湿性质的油藏水淹层识别和剩余油饱和度评价提供技术支持。
Wettabilitv is one of important factors of influencing electrical resistance of reservoir rock.The experiment studies the changing laws of electrical resistance with oil saturation in the course of fresh water flooding of different wettability cores and discovers the electricity conducting principle of different wettability rocks after the oil layer water flooded. The results indicate that after fresh water flooding the changing curve of electrical resistance of water-wet core shows"U"and"L"form,but one of oil-wet core declines.So the change of electrical resistance of the rock is influenced by original wettability.The above studied achievements can provide technical support for the watered-out layer interpretation and residual oil saturation evaluation in different wettability oil reservoirs.
关键词(KeyWords)：
淡水;驱替;电阻率;润湿性;水淹层
fresh water;flooding;electrical resistance;wettability;watered-out layer
基金项目(Foundation):
作者(Author):
俞军,王伟男,耿昕,杨芳
YU Jun~(1,2),WANG Wei-nan~2,GEGN Xin~2
参考文献(References)：
- [1]周渤然,林纯增,田中原,等.注水过程中岩石物理性质的实验研究[J].国外测井技术,1998,12(5):18-29.
- [2]范宜仁,刘兵开.淡水驱替过程中的岩石电阻率实验研究[J].测井技术,1998,22(3):153-155.
- [3]宋维琪,关继腾.注水过程中岩石电性变化规律的理论研究[J].石油地球物理勘探,2000,35(2):757-762.
- [4]刘正锋,王天波.复杂注水条件下储层电性物性变化机理实验研究[J].测井技术,2005,29(4):293-298.
- [5]Pirson S J,Fraser C D.Quantitative Interpretation of Electric Logs in Oil-Wet Rocks:Proposed Procedure and Example Applications[R]. SPE1562,1960.
- [6]Donaldson E C,Siddiqui T K.Relationship Between the Archie Saturation Exponent and Wettability[R].SPE16790,1987.
- [7]Anderson W G.Wettability Literature Survey-Part 3:The Effects of Wettability on the Electrical Properties of Porous Media[J].OJPT, 1986:1371-1378.
- [8]田中原,穆龙新,孙德明,等.砂砾岩水淹层测井特点及机理研究[J].石油学报,2002,23(6):50-55.
- [9]吴世旗.套管井储层剩余油饱和度测井评价技术[M].北京:石油工业出版社,1999:11.