Time-reverse microseismic hypocenter location with interferometric imaging condition based on surface and downhole multi-components
Li Zhenchun1, Sheng Guanqun1, Wang Weibo1, Cui Qinghui2, Zhou Deshan1
1. School of Geosciences, China University of Petroleum (East China), Qingdao, Shandong 266555, China;
2. Shengli Geophysical Research Institute, SINOPEC, Dongying, Shandong 257022, China
Abstract：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.
