收稿日期: 2004-11-25
修回日期: 2005-01-17
网络出版日期: 2005-04-20
APPLICATION OF 3D PRE STACK DEPTH MIGRATION IN CX GAS FIELD
Received date: 2004-11-25
Revised date: 2005-01-17
Online published: 2005-04-20
田彦灿;苏勤;王小卫;张建伟;王红旗; . 三维叠前深度偏移在CX气田的应用[J]. 天然气地球科学, 2005 , 16(2) : 242 -245 . DOI: 10.11764/j.issn.1672-1926.2005.02.242
3D prestack depth migration is an ideal seismic data imaging technique for the area where there o ccur very complicated geologic structure and severe lateral velocity variation.3 D prestack depth migration imaging technique have been applied to CX gas field,a nd bring satisfactory effect.The main steps of 3D prestack depth migration can b e described in the following points:①Design time model by picking up velocity h orizons in time section;②Construct interval velocity-depth model by using the interval velocities which have been obtained layer by layer with the use of cohe rent inversion and stacking velocity inversion methods;③Improve geologic model through residual velocity analysis;④Achieve the 3D prestack depth migration after finite difference algorithm.
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