歧口凹陷沙河街组烃源岩分级评价及优质烃源岩分布

王振升, 滑双君, 于学敏, 姜文亚

doi:10.11764/j.issn.1672-1926.2014.12.1896

天然气地球科学 >

2014 , Vol. 25 >Issue 12: 1896 - 1902

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.12.1896

天然气地质学

歧口凹陷沙河街组烃源岩分级评价及优质烃源岩分布

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中国石油大港油田勘探开发研究院，天津 300280

王振升(1960-)，男,山东无棣人，教授级高级工程师,主要从事油气勘探综合地质研究.E-mail:wangzhsheng@petrochina.com.cn.

收稿日期: 2014-05-21

修回日期: 2014-11-04

网络出版日期: 2019-09-18

基金资助

国家科技重大专项(编号:ZX201105006-005); 中国石油股份公司科技攻关项目(编号:2013E-050204)联合资助.

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Grading Evaluation and High Quality Source Rock Distribution in Qikou Sag

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Exploration and Development Research Institute of Dagang Oilfield,CNPC,Tianjin 300280,China

Received date: 2014-05-21

Revised date: 2014-11-04

Online published: 2019-09-18

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摘要

歧口凹陷沙河街组发育沙一段、沙三段2套重要的烃源岩层系，烃源岩累计厚度达1 500～2 500m，有机质丰度高，为歧口凹陷提供了丰富的油气资源。但由于不同地区、不同层系原始沉积环境和后期演化程度的差异使得烃源岩的质量和分布有着很强的非均质性。如何客观地评价烃源岩质量，并对不同质量的烃源岩分布进行精细刻画，明确优质烃源岩的展布是当前研究的重点和难点。通过研究，建立了烃源岩分级评价工作流程，厘定了歧口凹陷不同次凹、不同层系有效烃源岩和优质烃源岩下限标准，明确了歧口凹陷沙河街组优质烃源岩的分布特点，提出生烃中心南移的新认识，有效指导了勘探方案的制定。

关键词： 优质烃源岩; 下限; 生烃中心南移; 歧口凹陷

本文引用格式

王振升, 滑双君, 于学敏, 姜文亚 . 歧口凹陷沙河街组烃源岩分级评价及优质烃源岩分布[J]. 天然气地球科学, 2014 , 25(12) : 1896 -1902 . DOI: 10.11764/j.issn.1672-1926.2014.12.1896

Abstract

Three series of source rocks developed in Qikou Sag,including the 3^rd, the 2^nd and 1^stmembers of the Shahejie Formation.These source rocks have accumulated thickness of 1 500-2 500m and high content of total organic carbon,and they provide abundant oil resource in the study.The quality and distribution of source rocks show great heterogeneity because of the differences between original tectonic environment and final evolving feature in different areas and formations.The emphasis and difficulty of source rock evaluation is how to assess the quality of source rocks objectively and make fine structure and heterogeneity characterization.The high quality source rock evaluation was established in different areas and formations.The distribution of high quality source rocks is investigated,and it is proposed that the hydrocarbon generation center moves southward,which effectively direct the establishment of exploration targets in Qikou Sag.

Key words： High quality source rocks; Lower limit; Hydrocarbon generation center south moves; Qikou Sag

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