分层剖析变速成图方法
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摘要
本文针对低幅度构造区和深层、超深层构造区成图的难点,提出了相应的速度建场和变速成图方法——分层剖析变速成图法。把地质、地震、测井紧密地结合在一起;把需要解释的三维地震数据体按盆地的三重结构(盆前、盆地、盆后)划分为若干个地质场进行解释。通过运用层速度、层时差和层厚度等层参数,用声波测井资料分地质场建立层速度场;然后用层速度场与层间时差相乘,得到各层系的等厚图;逐层累加便可得到各中、深层的等深构造图。由分层剖析变速成图产生的图件,更逼近真实的地下地质构造形态。
To overcome difficulties of structure mapping in low-amplitude and deep or ultra deep structural area,this paper proposes a tomographic variable-velocity structure mapping method.Combining geologic,seismic,and log data,this method is different from the existing variable-velocity structure mapping methods.Considering sedimentary basins as divided into threefold structure,viz.before forming period,forming period,and after forming period,3D seismic interpretation is performed on a few geological fields.Using sonic logging data with interval velocity,interval time difference,and its thickness,an interval velocity field is built.Isopach maps can be obtained by multiplying interval velocity field and its time difference.So stratigraphic structures can be mapped by combining different isopach maps.This method coincides with geologic theory,and also coincides with theory of seismic waves.Results obtained from the tomographic variable-velocity structure mapping method are closer the true geology.
To overcome difficulties of structure mapping in low-amplitude and deep or ultra deep structural area,this paper proposes a tomographic variable-velocity structure mapping method.Combining geologic,seismic,and log data,this method is different from the existing variable-velocity structure mapping methods.Considering sedimentary basins as divided into threefold structure,viz.before forming period,forming period,and after forming period,3D seismic interpretation is performed on a few geological fields.Using sonic logging data with interval velocity,interval time difference,and its thickness,an interval velocity field is built.Isopach maps can be obtained by multiplying interval velocity field and its time difference.So stratigraphic structures can be mapped by combining different isopach maps.This method coincides with geologic theory,and also coincides with theory of seismic waves.Results obtained from the tomographic variable-velocity structure mapping method are closer the true geology.
引文
[1]陆基孟.地震勘探原理.山东东营:中国石油大学出版社,1993,123～154
[2]谢里夫R E,吉尔达特L P.勘探地震学.北京:石油工业出版社,1999,46～73
[3]王永刚.地震资料综合解释方法.山东东营:中国石油大学出版社,2007,112～163
[4]熊翥.山前冲断带物探技术改进的思路.中国石油勘探,2005,10(2):28～32Xiong Zhu.Improvement of geophysical technology forfoothill thrust belt.Petroleum Geophysical Explora-tion,2005,10(2):28～32
[5]王兴军,满益志,刘昌国等.低幅度构造变速成图技术.石油地球物理勘探,2008,43(增刊1):69～72Wang Xingjun,Man Yizhi,Liu Changguo et al.Veloc-ity-varying mapping technique for low-amplitude struc-ture.OGP,2008,43(Sup 1):69～72
[6]王西文等.多井约束下的速度建模方法和应用.石油地球物理勘探,2003,38(3):263～267Wang Xiwen et al.Multi-well constrained velocitymodel-building method and its application.OGP,2003,38(3):263～267
[7]谢锐杰,张超谟,漆家福等.声波测井资料在平均速度场中的应用.西南石油学院学报,2003,25(1):9～11Xie Ruijie,Zhang Chaomo,Qi Jiafu et al.Applicationof sonic logging in average velocity field.Journal ofSouthwest Petroleum Institute,2003,25(1):9～11
[8]曾照荣,肖玲,白兴盈等.声波测井与VSP测井平均速度的对比分析.新疆石油地质,2004,25(1):50～52Zeng Zhaorong,Xiao Ling,Bai Xingying et al.Corre-lation of mean velocities between sonic logging andVSP logging.Xinjiang Petroleum Geology,2004,25(1):50～52
[9]熊翥.21世纪初中期油气地球物理技术展望.北京:石油工业出版社,2006,192～193
[2]谢里夫R E,吉尔达特L P.勘探地震学.北京:石油工业出版社,1999,46～73
[3]王永刚.地震资料综合解释方法.山东东营:中国石油大学出版社,2007,112～163
[4]熊翥.山前冲断带物探技术改进的思路.中国石油勘探,2005,10(2):28～32Xiong Zhu.Improvement of geophysical technology forfoothill thrust belt.Petroleum Geophysical Explora-tion,2005,10(2):28～32
[5]王兴军,满益志,刘昌国等.低幅度构造变速成图技术.石油地球物理勘探,2008,43(增刊1):69～72Wang Xingjun,Man Yizhi,Liu Changguo et al.Veloc-ity-varying mapping technique for low-amplitude struc-ture.OGP,2008,43(Sup 1):69～72
[6]王西文等.多井约束下的速度建模方法和应用.石油地球物理勘探,2003,38(3):263～267Wang Xiwen et al.Multi-well constrained velocitymodel-building method and its application.OGP,2003,38(3):263～267
[7]谢锐杰,张超谟,漆家福等.声波测井资料在平均速度场中的应用.西南石油学院学报,2003,25(1):9～11Xie Ruijie,Zhang Chaomo,Qi Jiafu et al.Applicationof sonic logging in average velocity field.Journal ofSouthwest Petroleum Institute,2003,25(1):9～11
[8]曾照荣,肖玲,白兴盈等.声波测井与VSP测井平均速度的对比分析.新疆石油地质,2004,25(1):50～52Zeng Zhaorong,Xiao Ling,Bai Xingying et al.Corre-lation of mean velocities between sonic logging andVSP logging.Xinjiang Petroleum Geology,2004,25(1):50～52
[9]熊翥.21世纪初中期油气地球物理技术展望.北京:石油工业出版社,2006,192～193
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