基于倒频谱解析法的近接型相似微地震对研究
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摘要
为查明水力压裂实验所产生的人工裂隙网络区域的地应力场和局部构造特征,分析了1995～1996年在Soultz干热岩(HDR)地热田水力压裂实验中获得的声发射数据,通过倒频谱解析法,检出近接型相似微地震对,对其进行时间-倒频率分析,结合时间-倒频率-倒频谱表示图,判断出了P波的到达时间间隔,最后标定出近接型相似微地震对的相对震源坐标,判断出人工裂隙网局部的裂隙进展方向。
In order to understand the stress field and partial structure of the fracture network induced by hydraulic injection test,the authors analyzed the data acquired from hydraulic injection experiment in Soultz HDR(hot-dry-rock) field from 1995 to 1996.Proximity similar micro-seismic doublets were detected through cepstrum analyses.Afterwards,the time interval between P-waves can be obtained by time-quefrency analysis and 3D(time-quefrency-cepstrum) plot.Conclusively,the relative coordinates were calculated from the first event.According to the relative location of the proximity similar micro-seismic doublets,the direction of forward motion about the partial fracture can be got.
In order to understand the stress field and partial structure of the fracture network induced by hydraulic injection test,the authors analyzed the data acquired from hydraulic injection experiment in Soultz HDR(hot-dry-rock) field from 1995 to 1996.Proximity similar micro-seismic doublets were detected through cepstrum analyses.Afterwards,the time interval between P-waves can be obtained by time-quefrency analysis and 3D(time-quefrency-cepstrum) plot.Conclusively,the relative coordinates were calculated from the first event.According to the relative location of the proximity similar micro-seismic doublets,the direction of forward motion about the partial fracture can be got.
引文
[1]冉恒谦,冯起赠.我国干热岩勘查的有关技术问题[J].探矿工程,2010,37(10):17-21.
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[4]Moriya H.Detailed fracture system of the soultz-sous-forets HDR field evaluated using microseismic multipletanalysis[J].Pure and Applied Geophysics,2002(159):517-541.
[5]Akao Y,Watabe M.Inversion analysis for multiple-event process of the 1986 north palm springs earth-quake induced from strong motion accelerograms[J].Earthquake,1988,41(1):247-257.
[6]城户健一.中日对照数字信号处理入门[M].沈阳:东北大学出版社,2011:209-222.
[7]蒋宇,李力,赵美云.基于小波-倒频谱的齿轮故障诊断方法及应用[J].中国测试技术,2008,34(1):31-34.
[8]Nagano K,Ehara D.Automatic detection of proximityAE doublets for relative location of subsurface fracturereservoir[J].The Geothermal Research Society of Japan,2008,30(1):37-47.
[2]李川,王时龙,张贤明,等.干热岩在地热发电中的应用[J].热力发电,2008(11):138-139.
[3]Phillips W S.Precise microearthquake locations and fluidflow in the geothermal reservoir at soultz-sous-forets,france[J].Bulletin of the Seismological Society of Amer-ica,2000,90(1):212-228.
[4]Moriya H.Detailed fracture system of the soultz-sous-forets HDR field evaluated using microseismic multipletanalysis[J].Pure and Applied Geophysics,2002(159):517-541.
[5]Akao Y,Watabe M.Inversion analysis for multiple-event process of the 1986 north palm springs earth-quake induced from strong motion accelerograms[J].Earthquake,1988,41(1):247-257.
[6]城户健一.中日对照数字信号处理入门[M].沈阳:东北大学出版社,2011:209-222.
[7]蒋宇,李力,赵美云.基于小波-倒频谱的齿轮故障诊断方法及应用[J].中国测试技术,2008,34(1):31-34.
[8]Nagano K,Ehara D.Automatic detection of proximityAE doublets for relative location of subsurface fracturereservoir[J].The Geothermal Research Society of Japan,2008,30(1):37-47.
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