Locating borehole microseismic events based on the tracking component scanning
CUI Qinghui1, PAN Shulin2, DIAO Rui1, SHANG Xinmin1, RUI Yongjun1
1. Geophysical Research Institute, Sinopec Shengli Oilfield Company, Dongying, Shandong 257022, China; 2. School of Geosciences and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China
Abstract:Conventionally,locating borehole microseismic events is based on first arrivals and polarized information. However,if the SNR is low,they can't work well. Theoretical studies show that the X and Y components of a borehole detector can be synthesized into a new vector in any direction on the horizontal plane of the detector. When the vector is the tracking component of microseismic events,it has the strongest energy and the best waveform consistency among all detectors. According to the nature of three-component microseismic record,this paper introduces the stacked energy scanning method commonly used in surface microseismic location into borehole microseismic location. First compose the X and Y components of a detector into a new component in the horizontal plane along the direction from an imaginary source to the detector. Second,stack the waveforms and calculate energy E1 after NMO correcting the vectors of all detectors,then taking the sum of the energy of the synthetic vector of all detectors to get E2,and finally,taking the sum of E1 and E2 (E1+E2) as an objective function,find the grid with the largest cumulative energy,which is the location of the source point. It is not necessary to pick up first arrivals. Model and real data have proved the method is accurate to locate microseismic events and strong to resist noises. It can be used to locate microseismic events in the environment where the SNR is low.
杜开元,段国斌,徐刚,等.深层页岩气井压裂加砂工艺优化的微地震评价[J].石油地球物理勘探,2018,53(增刊2):148-155.DU Kaiyuan,DUAN Guobin,XU Gang,et al.Microseismic event evaluation for sand fracturing optimization in deep shale-gas wells[J].Oil Geophysical Prospecting,2018,53(S2):148-155.
[2]
李晓峰,张矿生,卜向前,等.老井重复压裂效果评价[J].石油地球物理勘探,2018,53(增刊2):162-167.LI Xiaofeng,ZHANG Kuangsheng,BU Xiangqian,et al.Evaluations of repeated fracturings in old wells[J].Oil Geophysical Prospecting,2018,53(S2):162-167.
[3]
衡峰,王刚,刘博,等.应用微地震监测技术研究不同簇间距压裂效果[J].石油地球物理勘探,2018,53(增刊2):137-142.HENG Feng,WANG Gang,LIU Bo,et al.Hydraulic fracturing with different cluster spacing based on microseismic monitoring[J].Oil Geophysical Prospecting,2018,53(S2):137-142.
[4]
Duncan P M,Eisner L.Reservoir characterization using surface microseismic monitoring[J].Geophysics,2010,75(5):A139-A146.
[5]
Chambers K,Kendall J M,Brandberg-Dahl S,et al.Testing the ability of surface arrays to monitor microseismic activity[J].Geophysical Prospecting,2010,58(5):817-826.
[6]
Maxwell S C,Rutledge J,Jones R,et al.Petroleum reservoir characterization using downhole microseismic monitoring[J].Geophysics,2010,75(5):A129-A137.
[7]
宋维琪,冯超.微地震有效事件自动识别与定位方法[J].石油地球物理勘探,2013,48(2):283-288.SONG Weiqi,FENG Chao.Automatic identification and localization of micro seismic effective events[J].Oil Geophysical Prospecting,2013,48(2):283-288.
[8]
宋维琪,高艳珂,朱海伟.微地震资料贝叶斯理论差分进化反演方法[J].地球物理学报,2013,56(4):1331-1339.SONG Weiqi,GAO Yanke,ZHU Haiwei.The diffe-rential evolution inversion method based on Bayesian theory for micro-seismic data[J].Chinese Journal of Geophysics,2013,56(4):1331-1339.
[9]
谭玉阳,李罗兰,张鑫,等.一种改进的基于网格搜索的微地震震源定位方法[J].地球物理学报,2017,60(1):293-304.TAN Yuyang,LI Luolan,ZHANG Xin,et al.An improved method for microseismic source location based on grid search[J].Chinese Journal of Geophysics,2017,60(1):293-304.
[10]
尹奇峰,潘冬明,郭全仕,等.基于快速模拟退火算法的井中微地震事件定位反演[J].地球物理学进展,2019,34(5):1954-1961.YIN Qifeng,PAN Dongming,GUO Quanshi,et al.Inversion of borehole microseismic event location based on fast simulated annealing algorithm[J].Progress in Geophysics,2019,34(5):1954-1961.
[11]
Bardainne T,Gaucher E,Cerda F,et al.Comparison of picking based and waveform based location methods of microseismic events:Application to a fracturing job[C].SEG Technical Program Expanded Abstracts,2009,28:1547-1551.
[12]
Pesicek J D,Child D,Artman B,et al.Picking versus stacking in modern microsearthquake location:Comparision of results from a surface passive seismic monitoring array in Oklahoma[J].Geophysics,2014,79(6):KS61-KS68.
[13]
Maxsell S C.Microseismic location uncertainty[J].CSEG Recorder,2009,34(4):41-46.
[14]
毛庆辉,王鹏,曾隽.水力压裂微地震事件定位方法综述[J].地球物理学进展,2019,34(5):1878-1886.MAO Qinghui,WANG Peng,ZENG Jun.Review of hydro-fracturing microseismic event location methods[J].Progress in Geophysics,2019,34(5):1878-1886.
[15]
何惺华.基于三分量的微地震震源反演方法与效果[J].石油地球物理勘探,2013,48(1):71-76.HE Xinghua.A micro-source inversion method based on three component data[J].Oil Geophysical Prospecting,2013,48(1):71-76.
[16]
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[J].石油地球物理勘探,2011,46(2):259-266.SONG Weiqi,YANG Xiaodong.A joint inversion combining the grid-search algorithm and the genetic algorithm under solution-domain constraints for microseismic events[J].Oil Geophysical Prospecting,2011,46(2):259-266.
[17]
加尔彼林E H.地震勘探偏振法[M].北京:石油工业出版社,1989,38-41.
[18]
张文波,李建峰,孙鹏远,等.基于直达波偏振分析的三分量检波器定向方法[J].石油地球物理勘探,2017,52(增刊2):19-25.ZHANG Wenbo,LI Jianfeng,SUN Pengyuan,et al.A three-component geophone orientation method based on direct P-wave polarization[J].Oil Geophysical Prospecting,2017,52(S2):19-25.
[19]
Gajewski D,Anikiev D,Kashtan B,et al.Localization of seismic events by diffraction stacking[C].SEG Technical Program Expanded Abstracts,2007,26,1287-1291.
[20]
Zhebel O,Gajewski D,Vanelle C.Localization of seismic events in 3D media by diffraction stacking[C].Extended Abstracts of 73rd EAGE Conference & Exhibition,2011,276-284.
[21]
徐克彬,陈祖斌,刘玉海,等.基于L-M算法的微地震定位方法[J].石油地球物理勘探,2018,53(4):765-769,790.XU Kebin,CHEN Zubin,LIU Yuhai,et al.A microseismic localization method based on L-M inversion algorithm[J].Oil Geophysical Prospecting,2018,53(4):765-769,790.
[22]
王维波,周瑶琪,春兰.地面微地震监测SET震源定位特性研究[J].中国石油大学学报(自然科学版),2012,36(5):45-50,55.WANG Weibo,ZHOU Yaoqi,CHUN Lan.Characteristics of source localization by seismic emission tomo-graphy for surface based on microseismic monitoring[J].Journal of China University of Petroleum(Natural Science Edition),2012,36(5):45-50,55.
[23]
周德山,韩文功,李振春,等.基于相对旅行时计算的地面微地震监测SET定位算法[J].地球物理学进展,2016,31(6):2495-2500.ZHOU Deshan,HAN Wengong,LI Zhenchun,et al.Source location method for surface microseismic monitoring based on relative travel time calculation[J].Progress in Geophysics,2016,31(6):2495-2500.
[24]
沈琛,梁北援,李田.微破裂向量扫描技术原理[J].石油学报,2009,30(5):744-748.SHEN Chen,LIANG Beiyuan,LI Tian.Principle of vector scanning technique for micro-fractures[J].Acta Petrolei Sinica,2009,30(5):744-748.
[25]
梁北援,冷传波.微破裂向量扫描原理的研发进展[J].地球物理学进展,2016,31(4):1620-1627.LIANG Beiyuan,LENG Chuanbo.Development of vector scanning for microseismic[J].Progress in Geophysics,2016,31(4):1620-1627.
[26]
潘树林,崔庆辉,秦子雨,等.基于多道信噪能量统计的微地震有效信号识别方法[J].物探化探计算技术,2019,41(4):527-533.PAN Shulin,CUI Qinghui,QIN Ziyu,et al.Microseismic event identification method based on multi-channel[J].Computing Techniques for Geophysical and Geochemical Exploration,2019,41(4):527-533.