天然气地球科学 ›› 2011, Vol. 22 ›› Issue (1): 157–163.doi: 10.11764/j.issn.1672-1926.2011.01.157

• 天然气地球物理学 • 上一篇    下一篇

利用地震地质资料综合研究X凹陷煤系地层分布

张锦伟, 赵志刚, 梁建设   

  1. 中海油研究总院,北京 100027
  • 收稿日期:2010-08-09 修回日期:2010-12-14 出版日期:2011-02-10 发布日期:2011-02-10
  • 通讯作者: 张锦伟zhangjw1@cnooc.com.cn E-mail:zhangjw1@cnooc.com.cn
  • 作者简介:张锦伟(1978-),男,江苏连云港人,工程师,主要从事中国近海盆地油气地球物理勘探工作.
  • 基金资助:

    国土资源部全国油气资源战略调查与评价项目(编号:XQ-2004-05)资助.

An Integrated Study on Coal Measure Distribution in X Sag Based  on Seismic and Geologic Data

ZHANG Jin-Wei, ZHAO Zhi-Gang, LIANG Jian-She   

  1. Research Center of Exploration Institute of CNOOC, Beijing 100027, China
  • Received:2010-08-09 Revised:2010-12-14 Online:2011-02-10 Published:2011-02-10

摘要:

Y组的煤系源岩是X凹陷天然气的重要源岩,准确预测其分布对于科学地评价X凹陷天然气勘探前景具有重要意义。在充分消化吸收前人工作成果的基础上,针对存在的主要问题,通过对井区煤层组进行岩石物理分析,确定能区分煤层与围岩的测井序列,从正演模拟研究出发,对煤系地层的地球物理响应特征进行分析,结合属性分析等技术手段,进行煤系地层地质特征的地球物理识别,综合运用岩心、测井、地球化学、古生物等资料,分析凹陷的成煤环境,对煤系地层的分布进行预测。经研究,认为X凹陷的西北部是Y组煤系地层最有利发育区,为富煤区所在,以多属性回归分析技术为代表的地震属性分析技术系列可以较好地预测薄煤层组合的分布规律。

关键词: 煤系地层, 测井序列, 地球物理响应, 地震属性, 多属性回归

Abstract:

The coal measure source rock in Y Formation is one of the important source rocks in X sag, the distribution of which is critical in assessing exploration prospect of X sag. Based on previous work, our study aimed at principal problems to analyze the petrophysical characteristics of the coal bed. The logging series that could be used to separate the coal bed from the wall rock was defined with forward modeling. The geophysical response of coal measure was analyzed by combining with seismic attribute analysis. In addition, the geological characteristics of the coal measure was recognized through the geophysics characteristics by integrating the core, well log, geochemical and palaeontology data to analyze the coal forming environment in the sag and the distribution of coal measure. The northwest of X sag is believed as the favorable areas that developed the coal measure in Y Formation and rich in coals. The analysis technique of seismic attribute represented by multiple-attribute regression is suitable for the prediction of the coal measure distribution.

Key words: Coal measure, Logging series, Geophysical response, Seismic attribute, Multiple-attribute regression.

中图分类号: 

  • TE132.1

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