井中地震CT观测系统研究
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摘要
井中地震CT具有高精度、高分辨率、接近探测目标等优点,在各类工程中得到较多应用。在震源确定情况下,地震数据的质量主要取决于观测系统的合理设计。本文通过理论模型正演得到相应的观测数据并进行CT成像反演,阐述了观测系统中射线角度、射线密度等因素对CT成像结果的影响。将研究成果应用于工程实际,取得满意效果。
Borehole seismic computed tomography(CT) has been widely applied in a variety of engineering projects;its advantages include accuracy,high resolution,and ease of use.The quality of seismic data depends mainly on the appropriate design of the observation system and the choice of seismic source.This paper,using the corresponding observing data from the forward simulating seismic wave propagation in theoretical model and in which carrying on the CT imaging inversion,discusses how to enhance the tomography by changing the ray angle and ray density of the observation system.The modified observation system developed in this study has been successfully applied in subsequent engineering projects.
Borehole seismic computed tomography(CT) has been widely applied in a variety of engineering projects;its advantages include accuracy,high resolution,and ease of use.The quality of seismic data depends mainly on the appropriate design of the observation system and the choice of seismic source.This paper,using the corresponding observing data from the forward simulating seismic wave propagation in theoretical model and in which carrying on the CT imaging inversion,discusses how to enhance the tomography by changing the ray angle and ray density of the observation system.The modified observation system developed in this study has been successfully applied in subsequent engineering projects.
引文
[1]杨文采.应用地震层析成像[M].北京:地质出版社,1993!Yang W C.Applied Seismic Tomography[M].Beijing:Geology Publishing House,1993.!
[2]上海市地质调查研究院.上海地球物理勘探技术应用与发展[M].上海:上海科学技术出版社,2010.Shanghai Institute of Geological Survey.The application and development of geophysical exploration technology in Shanghai[M].Shanghai:Shanghai Scientific&Technical Publishers,2010.
[3]王治华.地下空间地籍调查三维地震勘探技术应用研究[J].上海国土资源,2011,32(2):61-66.Wang Z H.Application of shallow 3D seismic exploration technology in the cadastral survey of underground space in Shanghai[J].Shanghai Land&Resources,2011,32(2):61-66.
[4]王运生,冷元宝.地震透射层析成像在水库工程中的应用[J].勘察科学技术,1992,(1):56-58,55.Wang Y S,Leng Y B.Application of seismic transparent geotomography on a reservior project investigation[J].Site Investigation Science and Technology,1992,(1):56-58,55.
[5]冷元宝,朱文仲.弹性波CT技术在小浪底防渗墙质检中应用研究[A].基桩与场地检测技术[C].武汉:湖北科学技术出版社,1995:1137-1401.Leng Y B,Zhu W Z.Application of elastic wave CT to detecting the anti-seepage wall of Xiaolangdi reservoir[A].Technology for testing of foundation piles and fields[C].Wuhan:Hubei Science and Technology Publishing House,1995:1137-1401.
[6]刘永华,田宗勇,喻振华,等.工程VSP与地震CT联合探测方法及其在岩土工程的应用[J].地球物理学进展,2005,(1):267-272.Liu Y H,Tian Z Y,Yu Z H,et al.Combined prospecting method of engineering VSP and seismic CT and its application on geotechnology[J].Progress in Geophysics,2005,(1):267-272.
[7]马德堂.弹性波场数值模拟及井间地震初至波旅行时层析成像[D].长安大学博士学位论文,2006.Ma D T.The forward modeling of elastic wave field and the cross-hole seismic preliminary wave tomography[D].Doctoral dissertation of Chang’an University,2006.
[8]陈可洋.多尺度随机孔洞介质地震波正演及其逆时成像[J].上海国土资源,2011,32(1):84-88.Chen K Y.Seismic wave forward simulation and reverse-time migration with multi-scale random carve medium[J].Shanghai Land&Resources,2011,32(1):84-88.
[9]张家峰,卞国林.井中CT层析成像反演[J].上海地质,1992,13(4):9-22.Zhang J F,Bian G L.The back-calaulation of CT of the well[J].Shanghai Geology,1992,13(4):9-22.
[2]上海市地质调查研究院.上海地球物理勘探技术应用与发展[M].上海:上海科学技术出版社,2010.Shanghai Institute of Geological Survey.The application and development of geophysical exploration technology in Shanghai[M].Shanghai:Shanghai Scientific&Technical Publishers,2010.
[3]王治华.地下空间地籍调查三维地震勘探技术应用研究[J].上海国土资源,2011,32(2):61-66.Wang Z H.Application of shallow 3D seismic exploration technology in the cadastral survey of underground space in Shanghai[J].Shanghai Land&Resources,2011,32(2):61-66.
[4]王运生,冷元宝.地震透射层析成像在水库工程中的应用[J].勘察科学技术,1992,(1):56-58,55.Wang Y S,Leng Y B.Application of seismic transparent geotomography on a reservior project investigation[J].Site Investigation Science and Technology,1992,(1):56-58,55.
[5]冷元宝,朱文仲.弹性波CT技术在小浪底防渗墙质检中应用研究[A].基桩与场地检测技术[C].武汉:湖北科学技术出版社,1995:1137-1401.Leng Y B,Zhu W Z.Application of elastic wave CT to detecting the anti-seepage wall of Xiaolangdi reservoir[A].Technology for testing of foundation piles and fields[C].Wuhan:Hubei Science and Technology Publishing House,1995:1137-1401.
[6]刘永华,田宗勇,喻振华,等.工程VSP与地震CT联合探测方法及其在岩土工程的应用[J].地球物理学进展,2005,(1):267-272.Liu Y H,Tian Z Y,Yu Z H,et al.Combined prospecting method of engineering VSP and seismic CT and its application on geotechnology[J].Progress in Geophysics,2005,(1):267-272.
[7]马德堂.弹性波场数值模拟及井间地震初至波旅行时层析成像[D].长安大学博士学位论文,2006.Ma D T.The forward modeling of elastic wave field and the cross-hole seismic preliminary wave tomography[D].Doctoral dissertation of Chang’an University,2006.
[8]陈可洋.多尺度随机孔洞介质地震波正演及其逆时成像[J].上海国土资源,2011,32(1):84-88.Chen K Y.Seismic wave forward simulation and reverse-time migration with multi-scale random carve medium[J].Shanghai Land&Resources,2011,32(1):84-88.
[9]张家峰,卞国林.井中CT层析成像反演[J].上海地质,1992,13(4):9-22.Zhang J F,Bian G L.The back-calaulation of CT of the well[J].Shanghai Geology,1992,13(4):9-22.
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