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水力压裂微地震监测的震源机制反演方法应用研究

石油物探

2014年 53卷第No. 5期

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Title

The application of microseismic source mechanism inversion in hydraulic fracturing monitoring

单位

(1.中国石油化工股份有限公司石油物探技术研究院，江苏南京211103;2.中国科学技术大学，安徽合肥230026)

Organization

(1.Sinopec Geophysical Research Institute,Nanjing 211103,China; 2.University of Science and Technology of China,Hefei 230026,China)

摘要

微地震监测是了解井下水力压裂效果的重要手段，震源机制的矩张量反演是了解压裂过程中裂缝破裂情况的主要工具。采用广义反透射系数方法正演理论地震记录，用矩张量描述震源属性，求解观测记录和矩张量的线性方程组，反演出震源机制解，并得到水力压裂所产生裂缝的方位和倾角等参数，为压裂裂缝的解释和压裂效果评价提供依据。理论模型和实际微地震资料的正、反演结果证明了方法的有效性。

Abstract

Microseismic monitoring is very important for hydraulic fracturing; moment tensor inversion is the main method to identify the breaking trend of induced fractures.Firstly,the generalized reflection and transmission coefficient method is used to model seismogram and moment tensor inversion is used to characterize the source attributes.Then,the linear equation group of observation records and moment tensor are solved to inverse the source mechanism,from which the strike,dip and other parameters of induced fractures are obtained.All the information provides the criteria for hydraulic fractures interpretation and fracturing evaluation.The forwarding and inversion results of theoretical model and actual microseismic data prove the effectiveness of the method.

关键词：

水力压裂; 微地震监测; 震源机制; 裂缝参数; 广义反透射系数;

Keywords:

hydraulic fracturing; microseismic monitoring; source mechanism; fracture parameter,generalized reflection transmission coefficient method;

基金项目

DOI

10.3969/j.issn.1000-1441.2014.05.008