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。
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.
出处
《中国石油勘探》
CAS
2009年第6期65-68,共4页
China Petroleum Exploration
关键词
各向异性
叠前时间偏移
双谱法速度分析
东濮凹陷
anisotropy
pre-stack time migration
bi-spectral velocity analysis
Dongpu sag
