新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (2): 182-184.

• 油气勘探 • 上一篇    下一篇

适于复杂断块的地震资料叠前时间偏移处理技术——以泌阳凹陷为例

曾庆才1, 杜耀斌2, 王德发1, 段洪有2, 李琛2   

  1. 1.中国地质大学(北京), 北京 100083;
    2.中国石化 河南油田分公司 勘探开发研究院, 河南 南阳 473132
  • 收稿日期:2006-10-09 出版日期:2007-04-01 发布日期:2020-07-31
  • 作者简介:曾庆才(1969-), 男, 江西兴国人, 高级工程师, 地球物理勘探,(Tel) 13581935501(E-mail) zeng_qc@163.com

Prestack Time Migration Applied to Seismic Data Processing in Complex Fault Blocks, Biyang Sag

ZENG Qing-cai1, DU Yao-bin2, WANG De-fa1, DUAN Hong-you2, LI Chen2   

  1. 1. China University of Geosciences, Beijing 100083, China;
    2. Research Institute of Exploration and Development, Henan Oilfield Company, Sinopec, Nanyang, Henan 473132, China
  • Received:2006-10-09 Online:2007-04-01 Published:2020-07-31

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摘要： 泌阳凹陷北部斜坡带构造复杂,小断块发育,地震纵、横向速度变化剧烈,成像困难,常规的地震成像方法成果难以满足勘探开发的需要。采用弯曲射线叠前时间偏移技术使小断块准确偏移归位,其走时方程更接近层状介质地震波的真实传播路径,成像聚焦更精确,且通过特殊振幅处理,其偏移结果有很好的保幅性,输出的道集可以用于岩性分析和反演研究。经实际应用,获得了较高质量的成像剖面,通过综合解释,对泌阳凹陷北部斜坡带断裂特征取得了新认识,发现了一批新圈闭,经钻探见到了良好的油气显示。

关键词: 复杂断块群, 叠前时间偏移, 地震成像, 振幅, 圈闭

Abstract: The slope zone in northern Biyang sag is characterized by complex structure, developed minor fault blocks, varied seismic vertical and horizontal velocities and difficult to get imaging, which result in that conventional imaging approaches are hard to meet the needs for exploration and development of this area. This paper presents the prestack time migration to curved rays for minor fault blocks, which is of more accurate migration, allowing the travel-time equation to be more close to the real pathway of layered media seismic wave propagation, the focused imaging to be more precise, the migrated results to be of good preserved amplitude processing property and the output trace gathers to be used for the lithologic analysis and inversion study. Case study shows that by this approach the imaging profiles with higher quality can be obtained, hence new recognitions of faults are gained, new traps are discovered and good oil shows in slope belt of northern Biyang sag have been encountered by drilling.

Key words: complex fault block, prestack time migration, seismic imaging, amplitude, trap

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