天然气地球科学

• 天然气勘探 • 上一篇    下一篇

低位楔三角洲砂体尖灭特征描述与识别技术——以珠江口盆地番禺地区为例

刘杰,秦成岗,张忠涛,刘道理,王秀玲,徐徽,屈亮,徐乐意   

  1. 中海石油(中国)有限公司深圳分公司,广东 广州 510240
  • 收稿日期:2013-01-19 修回日期:2013-05-22 出版日期:2013-12-10 发布日期:2013-12-10
  • 通讯作者: 刘杰liujie2@cnooc.com.cn. E-mail:liujie2@cnooc.com.cn.
  • 作者简介:刘杰(1982-),男,湖南冷水江人,工程师,硕士,主要从事地震综合解释与储层预测等研究. E-mail:liujie2@cnooc.com.cn.
  • 基金资助:

    “十二五”国家科技重大专项(编号:2011ZX05023-002-007)资助.

Sandbody Pinchout Description and Identification Technique of Lowstand Wedge-shaped Delta: Taking Panyu Field in Pearl River Mouth Basin as an Example

LIU Jie, QIN Cheng-gang, ZHANG Zhong-tao, LIU Dao-li, WANG Xiu-ling, XU Hui, QU Liang, XU Le-yi   

  1. Shenzhen Branch of CNOOC Ltd.,Guangzhou 510240,China
  • Received:2013-01-19 Revised:2013-05-22 Online:2013-12-10 Published:2013-12-10

摘要:

番禺地区B目标主要目的层是发育在SQ21.0层序陆架坡折带上的低位楔三角洲砂体,其单层厚度薄\,横向变化快。针对该区地震资料分辨率低、砂体尖灭边界较难落实的问题,从具有典型沉积特征的地震剖面入手,建立地质地球物理模型,并通过模型参数的正演,探讨了砂体顶部钙质高速层以及不同泥岩隔层厚度下的砂体尖灭响应特征;在此基础上应用属性分析和叠前同步反演等技术对砂体尖灭线进行了精细描述;最后结合实际资料和钻探结果的检验,进一步证实了该技术组合的有效性。

关键词: 陆架坡折带, 尖灭, 岩性圈闭, 模型正演, 叠前同步反演

Abstract:

The main target formation of B-area in Panyu Field is a lowstand-tract wedge-shaped delta sandstone developing on the shelf break zone in SQ21.0 sequence,which has thin layers and fast horizontal changes.Aiming at the difficulties of low resolution of seismic data and the uncertainty of sand pinchout boundary,this paper built geological and geophysical model from seismic profile of typical deposition,studied on the seismic response on sand pinchout of calcareous high-velocity overlying strata and different shale interlayer thickness by forward modeling;on the base of these,we applied seismic attribute analysis and pre-stack simultaneous inversion to finely describe the sand pinchout line;lastly,we confirmed the availability of the technology combination with the verification of real seismic and drilled data.

Key words: Shelf-break belt, Pinchout, Lithologic trap, Forward modeling, Pre-stack simultaneous inversion

中图分类号: 

  • TE132.1
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