中国石油勘探 ›› 2009, Vol. 14 ›› Issue (6): 65-68,1.

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各向异性叠前时间偏移在东濮凹陷的应用

秦广胜,蔡其新,张树海,汪功怀,柳金钟   

  1. 中国地质大学(北京);中国石化中原油田分公司物探研究院;中国石化中原油田分公司地质录井处
  • 出版日期:2009-12-15 发布日期:2009-12-15

Application of Anisotropic Pre-stack Time Migration in Dongpu Sag

Qin Guangsheng,Cai Qixin,Zhang Shuhai,Wang Gonghuai and Liu Jinzhong   

  1. Qin Guangsheng1,2,Cai Qixin2,Zhang Shuhai2,Wang Gonghuai2,Liu Jinzhong3 1.China University of Geosciences,Beijing 100039;2.Geophysical Research Institute of SINOPEC Zhongyuan Oilfield Company,Puyang City,Henan Province 457001;3.Geological Logging Division of SINOPEC Zhongyuan Oilfield Company,Puyang City,Henan Province 457001
  • Online:2009-12-15 Published:2009-12-15

摘要: 当地下岩层存在速度各向异性时,常规各向同性偏移成像方法不仅可能导致成像位置误差,也会影响地震偏移成像质量。利用东濮凹陷实际地震数据探讨一种各向异性叠前时间偏移方法,首先利用双谱法速度分析获得速度和各向异性参数,然后进行各向异性叠前时间偏移处理,在实际资料应用中获得较好的成像效果。

关键词: 各向异性, 叠前时间偏移, 双谱法速度分析, 东濮凹陷

Abstract: When velocity anisotropy exists in subsurface rocks, the conventional isotropic migration methods may lead to not only wrong imaging position but also inaccurate image quality. This paper presents a method of anisotropic pre-stack time migration with real 3D seismic data in Dongpu sag. First, velocity and anisotropy parameters are obtained by using bi-spectral velocity analysis, and then the pre-stack data is migrated with an anisotropic method. Good imaging results are fulfilled in real 3D data

Key words: anisotropy, pre-stack time migration, bi-spectral velocity analysis, Dongpu sag

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