陈国龙,冯子辉,邵红梅,高波,潘会芳,王继平
CHEN Guolong,FENG Zihui,SHAO Hongmei,GAO Bo,PAN Huifang,WANG Jiping

• 1:多资源协同陆相页岩油绿色开采全国重点实验室
• 2:黑龙江省陆相页岩油重点实验室
• 3:中国石油大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

为了深化对古龙凹陷青山口组页岩储层孔隙类型、孔隙结构及页岩油在孔隙中赋存特征的认识，搞清油气赋存、聚集位置及含油孔径下限，应用薄片鉴定、扫描电镜、氩离子-场发射电镜及能谱分析等实验手段，结合孔隙的几何形态、成因、与基质颗粒关系等划分古龙页岩储集空间类型，应用扫描电镜分析观察各类储集空间中的油气赋存，综合应用多种孔隙结构表征方法实现孔隙结构的多数据融合全尺度表征，应用激光共聚焦页岩油原位微区可视化分析技术，分析古龙页岩油微区分布特征，基于场发射电镜、序列洗油前后氮气吸附、保压岩心二维核磁分析，揭示含油孔径下限。结果表明：古龙页岩可归纳为粒间孔、晶间孔、溶蚀孔、有机质孔、有机黏土复合孔、裂缝6类储集空间，各种储集空间中均有油气赋存，高成熟（R_o大于1.2%）页岩的介孔和微孔是主要的储集空间，含油孔径下限低至2 nm。研究成果明确了古龙页岩油在各种类型孔隙、各种孔径孔隙中均有油气富集的特点，为页岩油原位富集理论提供了可靠的技术支撑。
In order to deepen the understanding of pore types, pore structures and occurrence characteristics of shale oil in Qingshankou Formation shale reservoirs in Gulong Sag, and to clarify oil and gas occurrence, accumulation locations and the lower limit of oil-bearing pore sizes, experimental methods such as thin section identification, scanning electron microscopy, argon ion-field emission electron microscopy and energy spectrum analysis are used to classify reservoir spaces of Gulong shale by combining pore geometry, genesis and their relationship with matrix particles. Environmental scanning electron microscopy is used to observe the occurrence of oil and gas in various reservoir space types, achieving multi-data fusion and full-scale characterization of pore structures by integrating multiple pore-structure characterization methods. Laser confocal visualization analysis technique for shale oil in-situ micro-area is applied to analyze micro-areas distribution characteristics in Gulong shale oil. Based on field emission electron microscopy, nitrogen adsorption before and after sequential oil washing and 2D nuclear magnetic resonance(NMR) analysis of pressure-maintained cores, the lower limit of oil-bearing pore sizes is revealed. The results show that Gulong shale exhibits 6 reservoir space types, including intergranular pores, intercrystalline pores, dissolved pores, organic matter pores, organic clay composite pores and fractures, all showing hydrocarbon occurrence. Mesopores and micropores in high-maturity shale(R_o > 1.2%) are the main reservoir spaces, with lower limit of oil-bearing pore size as low as 2 nm. The research confirms that Gulong shale oil is enriched in pores of various types and sizes, providing reliable technical support for in-situ shale oil enrichment theories.

关键词(KeyWords)： 古龙页岩;储集空间类型;储集性;含油性;孔隙结构;赋存状态;含油孔径下限
Gulong shale;reservoir space type;reservoir property;oil-bearing property;pore structure;occurrence state;lower limit of oil-bearing pore size

Abstract:

Keywords:

基金项目(Foundation): 黑龙江省重点研发计划项目“多资源协同陆相页岩油绿色开采全国重点实验室”（JD2023GJ02）

作者(Author): 陈国龙,冯子辉,邵红梅,高波,潘会芳,王继平
CHEN Guolong,FENG Zihui,SHAO Hongmei,GAO Bo,PAN Huifang,WANG Jiping

DOI: 10.19597/J.ISSN.1000-3754.202509040

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