复杂陡构造圈闭落实方法——以克深2号构造为例

Ascertainment of Complex Cliffy Structural Traps——An example from Keshen No.2 structure

地表及地下构造的复杂性使库车复杂山地陡构造圈闭落实面临诸多难点。2005年以来,对复杂山地地震勘探技术,尤其是地震采集及速度精细建模技术进行了重点攻关研究,最终形成了一套系统的复杂山地构造圈闭落实方法,即用复杂山地地震采集技术锁定构造样式,用表层速度反演建模技术、t0漂移校正技术等变速成图技术体系落实高陡构造圈闭,并在构造主体部位用叠前深度偏移成果进行对比验证,以达到提高复杂山地构造圈闭落实精度的目的。该方法在塔里木复杂山地的推广应用取得了良好的效果。

The complexity of surface and subsurface structures makes Kuqa complex and cliffy structural trap be difficultly ascertained. Since 2005, the stress has been plaeed on study of eomplex mountainous seismic exploration teehnique, especially related seismic acquisition and fine veloeity modeling techniques, and finally establishing a systematic method for ascertaining complex cliffy structural traps. This paper presents the method, including the seismie aequisition technique for aseertaining structural style, the superficial veloeity inversion modeling technique, T0 drift eorrection technique and variable veloeity mapping teehnique, for determination of eliffy structural traps. Also, the prestaek depth migration outeome at the main part of strueture is used to make a eorrelation and validation for the purpose of improving the precision of aseertaining the complex eliffy struetural traps. The application of this method to complex mountains in Tarim basin receives good effectiveness.