基于三分量的微地震震源反演方法与效果
|
摘要
微地震检测的关键是确定微震源的位置。本文讨论了利用井下多级三分量检波器资料反演微震源位置的新方法。首先用射孔直达纵波水平分量确定检波器的方位角;再在三维空间逐点对检波器组计算直达波旅行时并通过沿直达纵波时距曲线进行能量叠加,反演得到微地震震源位置的分布范围;针对微震源反演存在的多解性问题,利用微地震直达纵波水平检波器分量变换和震—检地理方位角的关系确定微震源的方位角;最后采用两种空间点集的统计方法确定微震源点的位置坐标。在均匀介质、斜井直线观测系统的三分量微地震正演模拟记录上所作的微震源反演试验表明,在信噪比较低的情况下,利用这些方法可以有效与稳定地反演微震源的位置。
The key of micro-seismic monitoring study is to decide micro-source location.We propose here a new method to inverse micro-source location using VSP multi-level three component data.Firstly the orientation angle of horizontal geophones is decided by horizontal components of direct compress wave generated from perforation.Then by calculating travel time of direct compress wave from every geophone point in 3Dspace and stacking energy along T-X curve of direct wave,micro-source distribution range is inversed.After that,a horizontal component conversion of microseismic direct compress wave and a source-receiver geography azimuth are used to determine micro-source azimuth.This is to reduce multi-solutions occurred in microsource inversion.Finally two statistic methods for space points are introduced to confirm the microsource location.A test on micro-seismic synthetic data of homogeneous medium with an inclined well and line geometry shows that micro-source location can be inversed accurately and steady by the new method even with low S/N synthetic data.
The key of micro-seismic monitoring study is to decide micro-source location.We propose here a new method to inverse micro-source location using VSP multi-level three component data.Firstly the orientation angle of horizontal geophones is decided by horizontal components of direct compress wave generated from perforation.Then by calculating travel time of direct compress wave from every geophone point in 3Dspace and stacking energy along T-X curve of direct wave,micro-source distribution range is inversed.After that,a horizontal component conversion of microseismic direct compress wave and a source-receiver geography azimuth are used to determine micro-source azimuth.This is to reduce multi-solutions occurred in microsource inversion.Finally two statistic methods for space points are introduced to confirm the microsource location.A test on micro-seismic synthetic data of homogeneous medium with an inclined well and line geometry shows that micro-source location can be inversed accurately and steady by the new method even with low S/N synthetic data.
引文
[1]Carsten Dinsker,Elmar Rothert,Serge Shapiro.In-terpretation of microseismic induced by hydraulicfracture.SEG Technical Program Expanded Ab-stracts,2006,25:1625～1629
[2]Francis Gerda,Raimon Alfaro.The application of mic-riseismic monitoring in E&P.SEG Technical Pro-gram Expanded Abstracts,2007,26:1312～1316
[3]Julian Drew,Joelle Calvez.Complexities in the quickanalysis and interpretation of microseismic data.SEGTechnicalProgramExpandedAbstracts,2007,26:1347～1351
[4]王爱国,周瑶琪,陈勇.基于微地震技术的油田裂缝检测及模拟.中国海洋大学学报,2008,38(1):116～120Wang Aiguo,Zhou Yaoqi,Chen Yong.Monitoringand simulation of fracture in oil field based on micro-seismic technology.Periodical of Ocean Universityof China,2008,38(1):116～120
[5]张山等.微地震监测技术在油田开发中的应用.石油物探,2002,41(2):226～231Zhang Shan et al.Application of microseismic moni-toring technology in development of oil field.GPP,2002,41(2):226～231
[6]梁兵,朱广生.油气田勘探开发中的微震监测方法.北京:石油工业出版社,2004,41～47
[7]宋维琪,刘军,陈伟.改进射线追踪算法的微震源反演.物探与化探,2008,32(3):274～278Song Weiqi,Liu Jun,Chen Wei.Microearthquakesource inversion of an improved ray tracing algo-rithm.Geophysical and Geochemical Exploration,2008,32(3):274～278
[8]宋维琪,杨晓东.解域约束下的微地震事件网格搜索法、遗传算法联合反演.石油地球物理勘探,2011,46(2):259～266Song Weiqi and Yang Xiaodong.A joint inversioncombining the grid-search algorithm and the geneticalgorithm under solution-domain constraints for mi-croseismic events.OGP,2011,46(2):259～266
[9]Disiena J E,Gaiser J P,Corrigan D.Three componentVSP-orientation of horizontal components for shearwave analysis.51st Annual Internatianal Meeting ofSEG,1981,1990～2011
[10]朱光明.垂直地震剖面法.北京:石油工业出版社,1988,146～150
[2]Francis Gerda,Raimon Alfaro.The application of mic-riseismic monitoring in E&P.SEG Technical Pro-gram Expanded Abstracts,2007,26:1312～1316
[3]Julian Drew,Joelle Calvez.Complexities in the quickanalysis and interpretation of microseismic data.SEGTechnicalProgramExpandedAbstracts,2007,26:1347～1351
[4]王爱国,周瑶琪,陈勇.基于微地震技术的油田裂缝检测及模拟.中国海洋大学学报,2008,38(1):116～120Wang Aiguo,Zhou Yaoqi,Chen Yong.Monitoringand simulation of fracture in oil field based on micro-seismic technology.Periodical of Ocean Universityof China,2008,38(1):116～120
[5]张山等.微地震监测技术在油田开发中的应用.石油物探,2002,41(2):226～231Zhang Shan et al.Application of microseismic moni-toring technology in development of oil field.GPP,2002,41(2):226～231
[6]梁兵,朱广生.油气田勘探开发中的微震监测方法.北京:石油工业出版社,2004,41～47
[7]宋维琪,刘军,陈伟.改进射线追踪算法的微震源反演.物探与化探,2008,32(3):274～278Song Weiqi,Liu Jun,Chen Wei.Microearthquakesource inversion of an improved ray tracing algo-rithm.Geophysical and Geochemical Exploration,2008,32(3):274～278
[8]宋维琪,杨晓东.解域约束下的微地震事件网格搜索法、遗传算法联合反演.石油地球物理勘探,2011,46(2):259～266Song Weiqi and Yang Xiaodong.A joint inversioncombining the grid-search algorithm and the geneticalgorithm under solution-domain constraints for mi-croseismic events.OGP,2011,46(2):259～266
[9]Disiena J E,Gaiser J P,Corrigan D.Three componentVSP-orientation of horizontal components for shearwave analysis.51st Annual Internatianal Meeting ofSEG,1981,1990～2011
[10]朱光明.垂直地震剖面法.北京:石油工业出版社,1988,146～150
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心