微破裂向量扫描技术原理
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摘要
对Semblance叠加公式进行了扩展,考虑了震源机制及其求解过程,开发了微破裂向量扫描技术,在开发区使用地震台网扫描地下空间破裂活动释放的能量,以适应地表监测微破裂时信噪比较低、地下微破裂多为剪切错动的特性。类似于开发区观测环境的算例结果表明,当信噪比降低至0.5时,人们仍可辨别破裂能量释放点,并估计破裂的震源机制。由此可知,利用不影响生产的、稀疏的、三分量的地震台网在地表监测开发区的地下破裂并使用微破裂向量扫描处理技术是可行的。
A vector scanning technique for micro-fractures was developed on the basis of seismic mechanism and Semblance addition to adapt the lower signal-to-noise ratio observed on surface and many slip fractures in production regions.The studied case similar to observation environment shows that the fracture points can still be identified in space and time even though the ratio is 0.5,and the seismic mechanism can be estimated through the scanning.It is feasible to monitor the fracture activities using the seismic network with independent,3-component,sparse distribution and the processing method.
A vector scanning technique for micro-fractures was developed on the basis of seismic mechanism and Semblance addition to adapt the lower signal-to-noise ratio observed on surface and many slip fractures in production regions.The studied case similar to observation environment shows that the fracture points can still be identified in space and time even though the ratio is 0.5,and the seismic mechanism can be estimated through the scanning.It is feasible to monitor the fracture activities using the seismic network with independent,3-component,sparse distribution and the processing method.
引文
①梁北援.微破裂地下影像技术在水力压裂监测中的应用.北京京援伟达技术有限公司,2009.
①Archambeau C.路易安娜油田地震监测报告.TRACNA,1994.
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[2]Duncan P.Is there a future for passive seismic[J].First Break,2005,23(6):111-115.
[3]王小凤,冯梅,史大年,等.微地震台阵网天然地震层析成像技术在油田深层构造解析中的应用[J].地质通报,2006,25(9/10),1028-1031.Wang Xiaofeng,Feng Mei,Shi Danian,et al.Application of Pas-sive seismic tomographic i magine techniqes in the study of deeptectonics in the oil fields[J].Geological Bulletin of China,2006,10:1028-1031.
[4]Kasahara K.Earthquake mechanics[M].England:Cambridge Uni-versity Press,1981:11-27.
[5]Sheriff R E.Encyclopedic dictionary of exploration geophysics[M].3rd Edition.US:SEG,1991:264.
[6]Jaeger J C,Cook N G W.Fundamentals of rock mechanics[M].3rd Edition.London:Chapman and Hall,1979:143-194.
[7]吴鑫基,温学诗.现代天文学十五讲[M].北京:北京大学出版社,2005:165-341.Wu Xinji,Wen Xueshi.Modern astronomy[M].Beijing:Peking U-niversity Press,2005:165-341.
[8]Liang B,Kisslinger C,Bryant C.Esti mate of the stress field inKilauea’s south flank,Hawaii[J].Geophysical Journal Interna-tional,1995,123(1):213-231.
①Archambeau C.路易安娜油田地震监测报告.TRACNA,1994.
[1]梁兵,朱广生.油气田勘探开发中的微震监测方法[M].北京:石油工业出版社,2004:5-80.Liang Bing,Zhu Guangsheng.Micro-seismic monitoring in oilfields[M].Beijing:PetroleumIndustry Press,2004:5-80.
[2]Duncan P.Is there a future for passive seismic[J].First Break,2005,23(6):111-115.
[3]王小凤,冯梅,史大年,等.微地震台阵网天然地震层析成像技术在油田深层构造解析中的应用[J].地质通报,2006,25(9/10),1028-1031.Wang Xiaofeng,Feng Mei,Shi Danian,et al.Application of Pas-sive seismic tomographic i magine techniqes in the study of deeptectonics in the oil fields[J].Geological Bulletin of China,2006,10:1028-1031.
[4]Kasahara K.Earthquake mechanics[M].England:Cambridge Uni-versity Press,1981:11-27.
[5]Sheriff R E.Encyclopedic dictionary of exploration geophysics[M].3rd Edition.US:SEG,1991:264.
[6]Jaeger J C,Cook N G W.Fundamentals of rock mechanics[M].3rd Edition.London:Chapman and Hall,1979:143-194.
[7]吴鑫基,温学诗.现代天文学十五讲[M].北京:北京大学出版社,2005:165-341.Wu Xinji,Wen Xueshi.Modern astronomy[M].Beijing:Peking U-niversity Press,2005:165-341.
[8]Liang B,Kisslinger C,Bryant C.Esti mate of the stress field inKilauea’s south flank,Hawaii[J].Geophysical Journal Interna-tional,1995,123(1):213-231.
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