双差分定位法在柴达木西部油田微地震定位中的应用研究
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摘要
概述了双差分定位法及其基本原理,重点介绍了双差分定位法在柴达木西部狮子沟油田微地震定位中的应用:对研究区内的微地震定位后,发现微地震分布与区内的断裂带具有一定的相关性,另外,油田油井的生产与注水对微地震的诱发有着影响。双差分定位后,数据残差平均值为0.36s,水平和垂直方向的估算误差平均值都在0.15m左右。利用高精度的双差分定位结果,可以对深层地质构造进行解析,为油田油气资源调查和评价提供信息。
The double difference method and its basic principle were summarized,which concentrate on its application in relocation of micro-earthquake in Shizigou oil field of western Caidam.After micro-earthquake location,the results showed that the epicenter distribution has significant correlations with the fracture zone in the study region.Besides,the fluid injection through the wells has a certain effect on inducing micro-earthquake.The average residual of relocated events is 0.36s while the average estimated error is about 0.15m in both ho-rizontal and vertical directions using the accuracy results of double difference location,the authors can provide some information to investigation and evaluation of oil and gas resources via the analysis of deep geological structure.
The double difference method and its basic principle were summarized,which concentrate on its application in relocation of micro-earthquake in Shizigou oil field of western Caidam.After micro-earthquake location,the results showed that the epicenter distribution has significant correlations with the fracture zone in the study region.Besides,the fluid injection through the wells has a certain effect on inducing micro-earthquake.The average residual of relocated events is 0.36s while the average estimated error is about 0.15m in both ho-rizontal and vertical directions using the accuracy results of double difference location,the authors can provide some information to investigation and evaluation of oil and gas resources via the analysis of deep geological structure.
引文
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[2]杨智娴,陈运泰,郑月军,等.双差地震定位法在我国中西部地区地震精确定位中的应用[J].中国科学,2003,33(增刊):129~134.
[3]姚运生,李井冈,廉超,等.双差地震定位程序的改进[J].大地测量与地球动力学,2007,27(3):76~79.
[4]李志海,赵翠萍,王海涛,等.双差地震定位法在北天山地区地震精确定位中的初步应用[J].内陆地震,2004,18(2):146~153.
[5]李永红,潘元生,张坤,等.双差定位方法在山东地区的应用[J].地震地磁观测与研究,2006,27(4):8~16.
[6]黄媛,杨建思,张天中.2003年新疆巴楚—伽师地震序列的双差法重新定位研究[J].地球物理学报,2006,49(1):162~169.
[7]王小凤,冯梅,史大年,等.微地震台阵网天然地震层析成像技术在油田深层构造解析中的应用[J].地质通报,2006,25(9~10):1 028~1 031.
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