准噶尔盆地西北缘油区内断裂对剩余油分布的影响作用
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摘要
准噶尔盆地西北缘油田勘探开发早期,对控制油藏的大断裂已有认识。进入开发后期,油区内部的微小断层的作用逐步突显出来,微小断层在油田开发中是导致地层砂体不连通、注采不对应、剩余油分布不均的重要原因。通过开发后期精细地震资料解释结合小井距密集分布的单井资料对比分析,总结出在准噶尔盆地西北缘油区内主要发育五种类型的断裂构造样式:逆冲叠式、"y"字型式、逆冲楔入式、背冲构造式和走滑扭断式。根据生产动态剖析认为油区内部微小断层对生产动态及剩余油分布具有重要影响,体现在影响断裂两侧储层性质分布差异、水驱油效果的差异、油水空间运动规律、油水界面的差异、注采效果差异等诸多方面,总之:综合运用各种资料分析是精细刻画储层提高采出程度的基础。
In the early stage of the oil exploration and development in the northwestern margin of Junggar basin,it was realized that large-scale faults controlled the reservoirs boundary and distribution.However,during the oil development stage,the important role of small and micro-faults in the distribution of oil began to emerge.These small faults resulted in the disconnection of sand bodies and the uneven distribution of residual oil.Through fine seismic data interpretation from densely spacing drilling well,five types of micro-faults were recognized,they were imbricate thrust type,"y" type,thrust wedge type,back blunt structure type and strike-slip type respectively.According to production dynamic analysis,micro-faults play an important role in the oil production dynamics and residual oil distribution.It reflected the difference of reservoir property distribution along the fracture,water displacement efficiency,oil and water motion space,boundary of injection-production,and so on.It was thought that comprehensive use of various data was the foundation of fine description of reservoir and improvement of recovery degree.
In the early stage of the oil exploration and development in the northwestern margin of Junggar basin,it was realized that large-scale faults controlled the reservoirs boundary and distribution.However,during the oil development stage,the important role of small and micro-faults in the distribution of oil began to emerge.These small faults resulted in the disconnection of sand bodies and the uneven distribution of residual oil.Through fine seismic data interpretation from densely spacing drilling well,five types of micro-faults were recognized,they were imbricate thrust type,"y" type,thrust wedge type,back blunt structure type and strike-slip type respectively.According to production dynamic analysis,micro-faults play an important role in the oil production dynamics and residual oil distribution.It reflected the difference of reservoir property distribution along the fracture,water displacement efficiency,oil and water motion space,boundary of injection-production,and so on.It was thought that comprehensive use of various data was the foundation of fine description of reservoir and improvement of recovery degree.
引文
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[16]李勇,宋宗平,李琼,等.火山岩体地震特征识别技术与应用研究[J].矿物岩石,2008,28(79):105-110.
[17]王振荣,兰江华.四川汶川大地震的构造分析[J].矿物岩石,2008,28(78):1-5.
[2]马宗晋,曲国胜,陈新发.准噶尔盆地深层构造分析及油气展布规律[J].新疆石油地质,2008,29(4):411-414.
[3]杨学文,邵鸿良,尚建林,等.百口泉油田走滑断裂带发现及其成藏意义[J].新疆石油地质,2006,27(2):163-165.
[4]吴庆福.试论生长逆断层带的活动及其油气勘探问题[J].石油与天然气地质,1987,8(2):119-125.
[5]何登发,贾承造.冲断构造与油气聚集[J].石油勘探与开发,2005,32(2):55-62.
[6]漆家福,夏义平,杨桥.油区构造解析[M].北京:石油工业出版社,2006,65-116.
[7]朱志澄.逆冲推覆构造[M].武汉:中国地质大学出版社,1989,12-58.
[8]Boyer S E,Elloit D.Thrust systems[J].AAPG Geol Bull,1982,66:1 196-1 230.
[9]刘和甫,梁慧社,蔡立国,等.川西龙门山冲断系构造样式与前陆盆地演化[J].地质学报,1994,68(2):101-118.
[10]郑和荣,李铁军,蔡立国,等.中国中西部前陆冲断褶皱带油气地质与勘探建议[J].石油与天然气地质,2004,25(2):156-161.
[11]Levorson A I.Geology of petroleum[M].Tulsa,Oklahoma:The AAPG Foundation,2001,234.
[12]Chapman R E.Effects of oil and gas accumulation on water movement[J].AAPG Bull,1982,66(3):328-374.
[13]赵文智,皱才能,谷振东,等.砂岩透镜体油气藏机理初探[J].石油勘探与开发,2007,34(3):273-284.
[14]K R.McClay edited AAPG Memoir Thrust Tectonics and Hydrocarbon systems[M].AAPG Bull,2004,41-46;276-298.
[15]徐春华,侯加根,唐衔,等.砾岩油藏注水开发阶段储层高渗流通道特征及识别[J].科技导报,2009,27(23):19-27.
[16]李勇,宋宗平,李琼,等.火山岩体地震特征识别技术与应用研究[J].矿物岩石,2008,28(79):105-110.
[17]王振荣,兰江华.四川汶川大地震的构造分析[J].矿物岩石,2008,28(78):1-5.
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