新疆石油地质

新疆石油地质 ›› 2003, Vol. 24 ›› Issue (6): 576-578.

• 应用技术 • 上一篇    下一篇

准噶尔盆地南缘山地静校正方法探讨

薛为平, 刘治凡, 周清华, 梁英   

  1. 中国石油 新疆油田分公司 勘探开发研究院 地球物理研究所, 新疆 乌鲁木齐 830011
  • 收稿日期:2002-11-20 出版日期:2003-12-01 发布日期:2020-08-24
  • 作者简介:薛为平(1957-), 男,山西离石人,工程师,地震勘探。联系电话:0991-4299157

Discussion of Static Correction Approaches for Mountains in Southern Margin of Junggar Basin

XUE Wei-ping, LIU Zhi-fan, ZHOU Qing-hua, LIANG Ying   

  1. Department of Geophysics, Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Urumqi, Xinjiang 830011, China
  • Received:2002-11-20 Online:2003-12-01 Published:2020-08-24

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摘要： 准噶尔盆地南缘地形、低降速带速度和厚度变化剧烈,高速层顶界面起伏不平,做好表层调查和静校正工作是地震勘探资料处理的关键。分析了常用的几种调查表层结构方法的基本原理、适用条件和优缺点,考虑到工区内地形和低降速带厚度变化特别巨大,提出南缘工区采用联合调查的方法调查表层地质结构,以绿山折射静校正初至折射法(以下简称EGRM)为基础,综合小折射、微测井和τ值等资料,综合建立近地表结构模型的方法。

关键词: 准噶尔盆地, 地震折射, 静校正, 低速带, 三维, 模型

Abstract: The near-surface survey and static correction are the key tasks of seismic data processing for mountain landform, varied low-velocity zone and thickness as well as relief top interface of high-velocity layer in southern margin of Junggar basin. The basic principles, applicable conditions and merit and demerit of several conventional methods for surface structure survey are analyzed. In light of extremely varied landform and low-velocity zone thickness in the studied area, joint survey of surface geological structures is proposed and adopted. On the basis of extended generalized reciprocal method (EGR4), integrated with mini-refraction, differential log and ! values, the method for near-surface structural models is developed, and taking 3D seismic of Tugulu mountain area an example, the effectiveness of the composite modeling is indicated.

Key words: Junggar basin, seismic refraction, static correction, low-velocity zone, 3D, model

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