陆相湖盆富有机质页岩微相特征及对页岩油富集的指示意义——以渤海湾盆地济阳坳陷为例

doi:10.7623/syxb201812002

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摘要

页岩油作为非常规油气资源的重要组成部分是石油地质学研究的热点之一。中国的页岩油资源大量赋存于陆相湖盆中，由于其储集、封盖、圈闭和运移等与常规油气不同，岩相对于页岩油的控制尤为显著。岩石学、全岩X衍射（XRD）、总有机碳（TOC）含量和油气显示等资料的分析表明，渤海湾盆地济阳坳陷沙河街组三段下亚段-沙河街组四段上亚段富有机质泥页岩的微相构成主要为薄透镜状晶粒灰岩微相（LF1）、纹层状泥晶灰岩微相（LF2）、厚层块状灰质泥岩微相（LF3）、块状泥岩微相（LF4）和黑色页岩微相（LF5）。其中，页岩油发育的有利微相和微相组合为黑色页岩微相（LF5）、块状泥岩微相（LF4）以及薄透镜状晶粒灰岩与黑色页岩的微相组合（LF1+LF5）。济阳坳陷有2种页岩油富集模式：①以块状泥岩微相（LF4）和黑色页岩微相（LF5）为主的"自生自储"模式；②以薄透镜状晶粒灰岩与黑色页岩微相组合（LF1+LF5）为主的"晶粒灰岩储层"模式。晶粒灰岩更有利于页岩油富集和开发生产，薄透镜状晶粒灰岩与黑色页岩的微相组合（LF1+LF5）是济阳坳陷陆相页岩油勘探开发的"甜点"岩相组合。

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	刘惠民
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	白辰阳

关键词 ：微相, 页岩油, 沙河街组, 济阳坳陷, 渤海湾盆地

Abstract：

Shale oil is an important component of unconventional hydrocarbon resources, and is also a hot spot in research of petroleum geology. In China, shale oil resources massively occur in the continental lacustrine basin. Due to the differences between shale oil and conventional oil in reserving, sealing, trapping and migration, the lithofacies have a significant controlling effect on shale oil accumulation. This study focuses on organic-rich shale in the lower sub-member of Member 3 to upper sub-member of Member 4 of Shahejie Formation in Jiyang depression, Bohai Bay Basin. Based on the petrology, whole-rock X-ray diffraction (XRD), total organic carbon (TOC) content and direct hydrocarbon indication (DHI) of the study layers, it is indicated that the micro-lithofacies of shale layers are dominated by thin lenticle crystalline limestone micro-lithofacies (LF1), lamellar micritic limestone micro-lithofacies (LF2), thick massive lime mudstone micro-lithofacies (LF3), massive mudstone micro-lithofacies (LF4)and black shale micro-lithofacies (LF5). Among them, the favorable micro-lithofacies (or combination)for shale oil accumulation are LF5, LF4 and LF1+LF5. There are two shale oil accumulation models in Jiyang depression:one is the "self-generation and self-reservoir" model dominated by LF4 and LF5; the other is the "crystalline limestone reservoir" model dominated by LF1+LF5. The crystalline limestones are more beneficial to shale oil accumulation, development and production, and the LF1+LF5 is the "sweet spot" micro-lithofacies combination for continental shale oil exploration and development in Jiyang depression.

Key words： micro-lithofacies shale oil Shahejie Formation Jiyang depression Bohai Bay Basin

收稿日期: 2018-01-30

TE122.2

基金资助:

国家重点基础研究发展计划（973）项目（2014CB239102），国家自然科学基金项目（No.41572134）和国家科技重大专项（2017X05049-004）资助。

通讯作者: 白辰阳,男,1991年8月生,2013年获中国地质大学(武汉)地质学专业学士学位,现为中国地质大学(北京)地质学专业博士研究生,主要从事沉积岩石学及含油气盆地沉积学研究。Email:cheny.bai@cugb.edu.cn E-mail: cheny.bai@cugb.edu.cn

作者简介: 刘惠民,男,1969年9月生,1992年获成都地质学院石油地质与勘查专业学士学位,2005年获中国石油大学(华东)地质学专业博士学位,现为中国石油化工股份有限公司胜利油田分公司油气勘探管理中心教授级高级工程师,主要从事油气勘探研究与管理工作。Email:hmliu@vip.163.com

引用本文:

刘惠民, 于炳松, 谢忠怀, 韩舒筠, 沈臻欢, 白辰阳. 陆相湖盆富有机质页岩微相特征及对页岩油富集的指示意义——以渤海湾盆地济阳坳陷为例[J]. 石油学报, 2018, 39(12): 1328-1343.
Liu Huimin, Yu Bingsong, Xie Zhonghuai, Han Shujun, Shen Zhenhuan, Bai Chenyang. Characteristics and implications of micro-lithofacies in lacustrine-basin organic-rich shale: a case study of Jiyang depression,Bohai Bay Basin[J]. Acta Petrolei Sinica, 2018, 39(12): 1328-1343.

链接本文:

http://www.syxb-cps.com.cn/CN/10.7623/syxb201812002 或 http://www.syxb-cps.com.cn/CN/Y2018/V39/I12/1328

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