收稿日期: 2008-12-12
修回日期: 2009-03-01
网络出版日期: 2009-04-10
Application of Tomographic Inversion Static Correction in Complex Areas of Western China
Received date: 2008-12-12
Revised date: 2009-03-01
Online published: 2009-04-10
王红旗 曲寿利 宁俊瑞 张建伟 徐蔚亚 王永胜 姜大建 . 层析反演静校正方法在西部复杂地区的应用[J]. 天然气地球科学, 2009 , 20(2) : 258 -262 . DOI: 10.11764/j.issn.1672-1926.2009.02.258
Static correction technique plays a key role in seismic data processing, especially in complicated surface. Static correction problem is serious in areas of western China with acute topographic undulation and sharp lateral variations of LVZ velocity. In complex near surface conditions, accurate near surface velocity models and static correction quantities cannot be acquired with conventional methods of field static correction and break first refraction static correction. Tomographic inversion static correction can obtain accurate near surface velocity models by tomographic inversion with nonlinear arithmetic, and figure out accurate static correction quantities. This paper introduces the basic theory and main steps of tomographic inversion static correction, including ray tracing and Simultaneous Iterative Reconstruction Technique inversion. Application result in the Bachu area of Tarim Basin shows that tomographic inversion static correction can clearly improve the effect of seismic stack imaging.
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