地球物理学进展 ›› 2013, Vol. 28 ›› Issue (3): 1390-1397.doi: 10.6038/pg20130332

• 应用地球物理 • 上一篇    下一篇

起伏地表叠前偏移在YCN探区的应用研究

孔祥宁, 朱海波   

  1. 中石化石油物探技术研究院, 南京 211103
  • 收稿日期:2013-04-29 修回日期:2013-05-05 出版日期:2013-06-20 发布日期:2013-06-20
  • 作者简介:孔祥宁,男,1955年生,江苏南京人,高级工程师,目前就职于南京市江宁区上高路219号 中石化石油物探技术研究院.主要从事石油及固体矿产地球物理勘探研究.(E-mail:kongxn.swty@sinopec.com)
  • 基金资助:
    国家重大科技专项(2011zx05035-002-005)资助.

Application study of topography pre-stack migration in YCN area

KONG Xiang-ning, ZHU Hai-bo   

  1. SINOPEC Geophysical Research Institute, Nanjing 211103, China
  • Received:2013-04-29 Revised:2013-05-05 Online:2013-06-20 Published:2013-06-20

摘要: 陆地勘探中地表起伏是资料处理一个非常重要影响因素,常规处理通过静校正使观测处在一个水平表面上.但静校正技术中射线垂直出射的假设往往不能成立,带来校正误差,而煤层因其埋深较浅,由地表起伏带来的这种误差尤为突出.起伏地表叠前偏移通过还原炮检点真实位置,能有有效消除静校正带了误差.针对YCN区域,分析了地质条件和表层状况,采用起伏地表叠前偏移处理流程.构建了成像基准面,建立基于成像面的速度模型,采用起伏地表的叠前偏移方法进行成像.实际资料处理结果表明,相对常规叠前偏移处理,提高了目的层分辨率,改善了成像聚焦效果.

Abstract: Land topography causes side effects on seismic exploration, through process of static corrections the data is played on horizontal plane. The hypothesis of vertical reflection always is not met, which cause the correction errors, especially in the coal exploration. Topography pre-stack migration can effectively eliminate this error by playing the shot and receiver on the actual position. By analysis of the surface geological conditions, building the imaging surface and velocity based on this surface, dealing with topography migration method, a procedure is applied in YCN area. The result show that better focus imaging and more layer resolution is get compare with conventional pre-stack migration.

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