摘要
微地震监测有井中和地面两种方式,而震源定位是最基本的问题。地面监测定位的纵向误差较大,井中监测的横向误差较大。为提高震源定位的准确性,本文采用井中和地面联合观测的方式,并且将逆时定位与干涉成像条件相结合,进行震源定位,提出了井地联合观测的逆时干涉定位算法。弹性波正演模型和随机模型的试算结果表明,该方法在稀疏观测、速度模型不准确地情况下,依然可以较为准确的定位,有效提高了震源定位的准确性。
The hypocenter location is the basic problem in microseismic monitoring.Two acquisition methods are used in the industry for microseismic monitoring of hydraulic fracturing:downhole arrays and surface arrays.Surface arrays have lower hypocenter vertical accuracy,while downhole arrays have lower hypocenter lateral accuracy.In order to improve the location accuracy,we propose a new approach,namely time-reverse location with the interferometric imaging condition based on surface and downhole arrays multi-components.Tests on elastic models and stochastic models show that the proposed method can greatly improve location accuracy even with sparse arrays and inaccurate velocity model.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2014年第4期661-666,671,共7页
Oil Geophysical Prospecting
基金
国家"863"项目(2011AA060303)
中央高校基本科研业务费专项资金(13CX02098A)联合资助
关键词
微地震
井地联合观测
多分量
逆时定位
干涉成像条件
microseismic,surface and downhole ar-rays,multi-component,time-reverse hypocenter location,interferometric imaging condition
