不同岩性页岩油储集空间及物性特征

周志军; 张国青; 崔春雪; 王静怡; 王娟

doi:10.3969/j.issn.1006-6535.2023.05.006

特种油气藏 >

2023 , Vol. 30 >Issue 5: 42 - 49

DOI: https://doi.org/10.3969/j.issn.1006-6535.2023.05.006

地质勘探

不同岩性页岩油储集空间及物性特征

周志军 ,
张国青 ,
崔春雪 ,
王静怡 ,
王娟

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1.东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆 163318;
2.中国科学院力学研究所,北京 100190;
3.中国石油大庆油田有限责任公司,黑龙江大庆 163318;
4.中海油服油田生产事业部,天津 300459

周志军(1966—)男,教授,博士生导师,1990年毕业于大庆石油学院油藏工程专业,2003年毕业于该校油气田开发工程专业,获博士学位,现主要从事油气田数值模拟及页岩油微观流动机理等方向的研究。

收稿日期: 2023-03-26

修回日期: 2023-06-26

网络出版日期: 2023-12-25

基金资助

国家科技重大专项“济阳坳陷页岩油数字岩心模拟测试”(2017ZX05049-004);东北石油大学国家基金培育基金“济阳坳陷泥页岩微观孔隙结构特征及流动机制研究”(2018GPYB-02)

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Reservoir Space and Physical Characteristics of Shale Oil with Different Lithologies

Zhou Zhijun ,
Zhang Guoqing ,
Cui Chunxue ,
Wang Jingyi ,
Wang Juan

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1. Key Laboratory for Improving Oil and Gas Recovery (Northeast Petroleum University), Ministry of Education, Daqing, Heilongjiang 163318, China;
2. Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China;
3. PetroChina Daqing Oilfield Co., Ltd., Daqing, Heilongjiang 163318, China;
4. COSL Oilfield Production Division, Tianjin 300459, China

Received date: 2023-03-26

Revised date: 2023-06-26

Online published: 2023-12-25

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摘要

针对济阳坳陷沙河街组储层特征认识不深入,影响页岩油勘探与开发的问题,以济阳坳陷古近系沙河街组沙三下亚段和沙四上亚段重点取心井为研究对象,利用X-Ray Diffraction测定页岩储层矿物组分,通过扫描电镜对不同岩性页岩的储集空间和孔径进行定量刻画,分析页岩储层的优势岩性。研究结果表明:济阳坳陷页岩可划分为泥岩类、灰岩类、白云岩类,沙三下亚段泥岩类较为发育,沙四上亚段白云岩类较为发育;白云岩类发育中大孔,油迹主要赋存于白云石粒间微孔及溶蚀孔中;泥岩类发育中小孔,油迹主要充填于粒间微孔及粒间微缝中;灰岩类发育小孔,油迹主要赋存于晶间微孔中,局部赋存于溶蚀孔中;页岩储层的优势岩性依次为白云岩、泥岩、灰岩;不同岩性的含油率及试油数据表明,济阳坳陷沙河街组沙四上亚段属于高产油段,可作为济阳坳陷沙河街组“甜点”层系。研究成果对济阳坳陷页岩油勘探开发的深入具有指导意义。

关键词： 济阳凹陷; 页岩油; 不同岩性; 储集空间; 物性特征

本文引用格式

周志军 , 张国青 , 崔春雪 , 王静怡 , 王娟 . 不同岩性页岩油储集空间及物性特征[J]. 特种油气藏, 2023 , 30(5) : 42 -49 . DOI: 10.3969/j.issn.1006-6535.2023.05.006

Abstract

In view of the lack of deep understanding of the reservoir characteristics of the Shahejie Formation in the Jiyang Depression, it affects the exploration and development of shale oil. Taking key coring wells of the lower sub-section of the Member 3 and the upper sub-section of the Member 4 of the Paleogene Shahejie Formation of in the Jiyang Depression as the study object, X-Ray Diffraction was used to determine the mineral composition of shale reservoirs, and the shale was classified into mudstone Shale, limestone and dolomite, the mudstone in the lower sub-section of the Member 3 of the Shahejie Formation is relatively developed, and dolomite in the upper sub-section of the Member 4 of the Shahejie Formation is relatively developed; the reservoir space and pore size of shale with different lithologies were quantitatively described with the scanning electron microscopy, and the predominant lithology of shale reservoirs was analyzed. The results of the study show that the medium to large pores were developed in dolomite, and the oil are mainly occurred in the dolomite intergranular micropores and dissolved pores; the medium to small pores were developed in mudstone, and the oil were mainly filled in the intergranular micropores and intergranular micro-fractures; the small pores were developed in limestone, and the oil were mainly occurred in the intergranular micropores and locally in the dissolved pores; the dominant lithologies of shale reservoirs were, in order of preference: dolomite, mudstone and limestone; the oil content and oil test data of different lithologies showed that the upper sub-section of the Member 4 of Shahejie Formation in the Jiyang Depression is a high-production oil section, and it can be determined as the “sweet spot”reservoir of the Shahejie Formation in the Jiyang Depression. The study results have guidance significance to the exploration and development of shale oil in Jiyang Depression.

Key words： Jiyang Depression; shale oil; different lithologies; reservoir space; physical characteristics

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