用反射波旅行时对层状介质进行成像的新方法
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摘要
根据地震波的射线理论，给出了利用反射波旅行时对层状介质进行成像的新方法。在局部范围内可将地层各界面视作为平面，求取界面、速度诸参数，整个创面的成像只需反复在局部范围内求解。数值试验表明：本方法具有较高精度和收敛速度快等特点，适用于横向变化小、界面起伏比较平缓的地质剖面成像。
According to the ray theory of seismic wave,we advanced a new method for layered--medium image using reflection travel time. In the method,formation interface in small extent can be considered as a plane ;with the use of estimated parameters such as interface, velocity and so on, the image of a whole section can beachieved only by making repeated solutions in small extents. The numerical trials indicate that because this method is characterized by high accuracy,fast convergence and so on,it is applicable to image of the seismic section which shows small lateral variation and gentle interface undulation.
According to the ray theory of seismic wave,we advanced a new method for layered--medium image using reflection travel time. In the method,formation interface in small extent can be considered as a plane ;with the use of estimated parameters such as interface, velocity and so on, the image of a whole section can beachieved only by making repeated solutions in small extents. The numerical trials indicate that because this method is characterized by high accuracy,fast convergence and so on,it is applicable to image of the seismic section which shows small lateral variation and gentle interface undulation.
引文
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2 Gray W C and Golden J E. Velocity determination In a complex earth. Presented at 53rd SEG Mtg, 1983
3 Kjartansson E. Attenuation of seismic wave In rocks and application In energy exploration, Ph D thesisStanford University,1980
4 Bishop T N et al. Tomographic determination of velocity and depth In laterally varying media. Geophysics,1985,50(6):903～923
5 Sward C H Jr. Tomographic determination of Interval velocity from reflection seismic data,the method ofcontrolled directlonal reception,Ph D thesis,Stanford University,1987
6 Haas A and Viallix J R. Stockastic inversion by ray continuation: application to seismic tomographic Geo-physical Prospecting,1989,37(4):337～356
7 William S H.从反射波射线路径对地震波速度实施层析成像计算.石油物探译丛,1990,(3):19～23
8王仰华.确定三维地层速度结构的地震层析成像技术.石油物探,1989,28(2):26～35
9黄鑫,王妙月.地震层析成像技术在测井和地面反射资料中的应用研究.地球物理学报,1989,32(3):319～328
10 Hubral P.Time migration-Some ray theoretical aspects.Geophysical Prospecting,1997,25(4):738～745
11曹景忠.Hubral观察的解析证明.石油物探,1990,29(4):47～54
12吴建成,魏明果.二维速度反演中的快速校正方法.石油物探,1991,30(2):89～96
2 Gray W C and Golden J E. Velocity determination In a complex earth. Presented at 53rd SEG Mtg, 1983
3 Kjartansson E. Attenuation of seismic wave In rocks and application In energy exploration, Ph D thesisStanford University,1980
4 Bishop T N et al. Tomographic determination of velocity and depth In laterally varying media. Geophysics,1985,50(6):903～923
5 Sward C H Jr. Tomographic determination of Interval velocity from reflection seismic data,the method ofcontrolled directlonal reception,Ph D thesis,Stanford University,1987
6 Haas A and Viallix J R. Stockastic inversion by ray continuation: application to seismic tomographic Geo-physical Prospecting,1989,37(4):337～356
7 William S H.从反射波射线路径对地震波速度实施层析成像计算.石油物探译丛,1990,(3):19～23
8王仰华.确定三维地层速度结构的地震层析成像技术.石油物探,1989,28(2):26～35
9黄鑫,王妙月.地震层析成像技术在测井和地面反射资料中的应用研究.地球物理学报,1989,32(3):319～328
10 Hubral P.Time migration-Some ray theoretical aspects.Geophysical Prospecting,1997,25(4):738～745
11曹景忠.Hubral观察的解析证明.石油物探,1990,29(4):47～54
12吴建成,魏明果.二维速度反演中的快速校正方法.石油物探,1991,30(2):89～96
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