Lithologic Reservoirs ›› 2008, Vol. 20 ›› Issue (3): 79-82.doi: 10.3969/j.issn.1673-8926.2008.03.016

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Application of tomographic static correction in northern margin of Qaidam Basin

WU Jie, SU Qin, WANG Jianhua   

  1. Research Institute of PetroleumExploration &Development-Northwest (NWGI) , PetroChina, Lanzhou 730020, China
  • Online:2008-09-15 Published:2008-09-15

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Abstract:

Since seismic exploration in the northern margin of Qaidam Basin is mainly carried out in mountainous region, foothill belt, gobi and desert, where the variation of lowvelocity layer is rapid, so static correction has become a bottleneck restricting the effect of exploration. Tomographic static correction technology of Greenmountain is a nonlinear inversion method, which inverses the near surface velocity structure by means of first break time and ray path gained by ray-tracingmethod, calculates the statics, eliminates the effect of static correction and improves the resolution of seismic section. The application in the northern margin of QaidamBasin shows that this method improves the statics precision and resolves the statics problemsuccessfully.

Key words: reef, evolution, Changxing Formation, Jiantianba

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