乌尔逊凹陷反向断层及与油气的关系
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摘要
海拉尔盆地乌尔逊凹陷经历了多期建造和改造。从分析乌尔逊凹陷建造和改造过程中的断裂变形特征入手,通过地震剖面的解释,按断裂活动期次将乌尔逊凹陷反向断层分为:早晚期、早中晚期、早中期、晚期、中晚期、中期6种类型。通过目的层的反向断层平面分布特征和油气勘探成果分析,认为乌尔逊凹陷的反向断层,尤其是早中晚期型反向断层控制了油气运移与聚集;反向断层的上升盘所形成的圈闭最有利于捕获油气,可作为重点勘探目标。
The Wuerxun depression has experienced multi-period formations and reconstructions.The article analyses the characteristics of the fault deformation of the Wuerxun depression in the process of formation and reconstruction.Through the interpretation of the seismic profiles,according to the stages of the fault activities,the antithetic fault of the Wuerxun depression is divided into early-late period,early-middle-late period,early-middle period,late period,middle-late period and middle period.The analyses of the plane distribution characteristics of the antithetic fault and the hydrocarbon exploration achievements of the target stratum suggest that the antithetic fault of the Wuerxun depression controls hydrocarbon migration and accumulation and that the trap forming at the upside of the antithetic fault is most favorable for capturing oil and gas and can be used as the key target for exploration at the next step.
The Wuerxun depression has experienced multi-period formations and reconstructions.The article analyses the characteristics of the fault deformation of the Wuerxun depression in the process of formation and reconstruction.Through the interpretation of the seismic profiles,according to the stages of the fault activities,the antithetic fault of the Wuerxun depression is divided into early-late period,early-middle-late period,early-middle period,late period,middle-late period and middle period.The analyses of the plane distribution characteristics of the antithetic fault and the hydrocarbon exploration achievements of the target stratum suggest that the antithetic fault of the Wuerxun depression controls hydrocarbon migration and accumulation and that the trap forming at the upside of the antithetic fault is most favorable for capturing oil and gas and can be used as the key target for exploration at the next step.
引文
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[3]谯汉生,牛嘉玉,王明明.中国东部深部层系反向断层遮挡聚油原理与勘探实践[J].石油勘探与开发,1999,26(6):10-13.
[4]张忠涛,施和生,秦成岗,等.番禺低隆起-白云凹陷北坡断层封闭性研究[J].断块油气田,2010,17(1):24-27.
[5]邹丙方,吴兴录,陈鸿雁.笔架岭构造带反向正断层与油气聚集关系研究[J].断块油气田,1999,6(5):14-16.
[6]李家康.渤海油气成藏特点及与断层关系[J].石油学报,2001,22(2):26-31.
[7]沈华,刘俊,刘建党.贝尔凹陷褶皱构造样式及成因分析[J].中国矿业,2005,14(3):79-82.
[8]吴根耀.白垩纪:中国及邻区板块构造演化的一个重要变换期[J].中国地质,2006,33(1):64-77.
[9]李述靖,张维杰,耿明山,等.蒙古弧地质构造特征及形成演化概论[M].北京:地质出版社,1998.
[10]李晓清,丘东洲,刘和甫,等.蒙古弧形褶皱带上叠沉积盆地油气远景[J].地学前缘,2006,13(6):72-81.
[11]刘震,赵阳,杜金虎,等.陆相断陷盆地岩性油气藏形成与分布的“多元控油一主元成藏”特征[J].地质科学,2006,41(4):1-24.
[12]曹瑞成,朱德丰,陈均亮,等.海拉尔-塔木察格盆地构造演化特征[J].大庆石油地质与开发,2009,28(5):39-43.
[13]陈均亮,蒋鸿亮,李宏伟,等.海拉尔盆地乌尔逊凹陷中的三角形断块:演化及对油气的控制作用[J].地质科学,2009,44(2):657-668.
[14]陈均亮,吴河勇,朱德丰,等.海拉尔盆地构造演化及油气勘探前景[J].地质科学,2007,42(1):147-159.
[15]崔军平,任战利,陈全红,等.海拉尔盆地乌尔逊凹陷油气成藏期次分析[J].西北大学学报,2007,37(3):465-469.
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