Key parameters and methods of lacustrine shale oil reservoir characterization

doi:10.7623/syxb202101001

Acta Petrolei Sinica ›› 2021, Vol. 42 ›› Issue (1): 1-14.DOI: 10.7623/syxb202101001

• Petroleum Exploration • Next Articles

Key parameters and methods of lacustrine shale oil reservoir characterization

Kuang Lichun¹, Hou Lianhua², Yang Zhi², Wu Songtao²

1. Technology Administration Department, PetroChina Company Limited, Beijing 100007, China;
2. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China

Received:2020-04-23 Revised:2020-08-26 Online:2021-01-25 Published:2021-02-05

陆相页岩油储层评价关键参数及方法

匡立春¹, 侯连华², 杨智², 吴松涛²

1. 中国石油天然气股份有限公司科技管理部北京 100007;
2. 中国石油勘探开发研究院北京 100083

通讯作者: 匡立春,男,1962年6月生,1982年获华东石油学院学士学位,2002年获石油大学(北京)博士学位,现为中国石油天然气股份有限公司科技管理部总经理、教授级高级工程师,主要从事油气勘探综合研究及科技管理工作。
作者简介:匡立春,男,1962年6月生,1982年获华东石油学院学士学位,2002年获石油大学(北京)博士学位,现为中国石油天然气股份有限公司科技管理部总经理、教授级高级工程师,主要从事油气勘探综合研究及科技管理工作。Email:klc@petrochina.com.cn
基金资助:
中国石油天然气股份有限公司国际合作项目（2015D-4810-02）和中国石油天然气股份有限公司重大科技专项（2019E-26）资助。

Abstract

Abstract: Exploration practices have proven that various types of shale oil are widely developed in the central lacustrine basin, demonstrating huge amount of resources with a great exploration prospect. By summarizing the important exploration advances and geological understandings of lacustrine shale oil in China, in combination with the geological characteristics of various types of shale oil, this study focuses on the key characterization parameters and methods of shale oil. The results show that:(I) The shale oil experiment project mainly involves five aspects including organic geochemistry, rock and mineral composition, reservoir properties, fluid properties and rock mechanics. Five key parameters including TOC, total porosity, oil content, free oil content and effective thickness are selected for shale oil characterization. (II) TOC indicates the total organic carbon content, for which combustion oxidation-non-dispersive infrared absorption method is the main experiment method. (III) Total porosity is the proportion of reservoir space to the total volume of rock, and can be obtained using the comprehensive characterization experiment method focusing on the physical properties and saturability tests of shale. (IV) Oil content refers to the total amount of hydrocarbons occurring in the reservoir space, including the amount of self-accumulated hydrocarbons under natural conditions and the potential amount of hydrocarbons generated by manual intervention. Closed coring method and oil content method is adopted for the shale oil with medium-high maturity and medium-low maturity respectively. (V) Free oil content is the amount of movable oil and gas in the shale systems, consisting of the theoretical and actual amount of movable hydrocarbon under the formation conditions and development conditions. It is obtained by closed coring and nuclear magnetic resonance experiments, as well as the determination on the basis of actual production data. (VI) Effective thickness refers to the thickness of the shale section with commercial oil and gas controlled by a single well during horizontal well development. The upper and lower limit values are obtained by the evaluation of seven properties in well logging. It is of great significance to optimize the key parameters and methods suitable for shale oil characterization, to provide theoretical and technical support for the reserve evaluation and production capacity construction of lacustrine shale oil in China.

Key words: lacustrine shale oil, shale system, total porosity of shales, oil content of shales, free oil content, effective thickness of shales, reserve evaluation

摘要： 勘探开发证实，陆相湖盆发育类型多样、分布广泛的页岩油，展现出巨量的资源前景。通过梳理中国陆相页岩油的主要勘探进展和地质认识，结合不同类型页岩油地质特征，重点研究了页岩油表征的关键参数及方法。研究结果表明：①页岩油实验项目主要包括有机地球化学、岩矿组分、储集性能、流体性质和岩石力学5个方面，可以优选出页岩TOC、总孔隙度、含油量、游离油量和有效厚度5个关键表征参数；②TOC是页岩中的总有机碳含量，燃烧氧化-非分散红外吸收法是其主要实验方法；③总孔隙度是页岩储集空间占岩石总体积的比例，可采用以物性与饱和度测试方法为核心的综合表征实验方法获得；④含油量是赋存于页岩储集空间内的烃类总量，包括自然条件的赋存烃量和人工干预的潜在烃量，中—高成熟度页岩采用密闭取心方法，中—低成熟度页岩采用含油率方法；⑤游离油量是页岩层系中可动的油气量，包括地层和开发条件下理论与实际的可动油量，采用密闭取心、核磁共振等实验和实际生产资料确定等方法获得；⑥有效厚度是指采用水平井开发时，单井控制的具有商业油气价值产出的页岩层段厚度，其存在上限和下限厚度值，采用测井"七性"评价方法获得。通过针对性优选出适用页岩油表征的关键参数及方法，对支撑中国陆相页岩油储量评价和产能建设具有重要意义。

关键词: 陆相页岩油, 页岩层系, 页岩总孔隙度, 页岩含油量, 页岩游离油量, 页岩有效厚度, 储量评价

CLC Number:

TE122.2

Kuang Lichun, Hou Lianhua, Yang Zhi, Wu Songtao. Key parameters and methods of lacustrine shale oil reservoir characterization[J]. Acta Petrolei Sinica, 2021, 42(1): 1-14.

匡立春, 侯连华, 杨智, 吴松涛. 陆相页岩油储层评价关键参数及方法[J]. 石油学报, 2021, 42(1): 1-14.

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Key parameters and methods of lacustrine shale oil reservoir characterization

陆相页岩油储层评价关键参数及方法

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