宿晓岑,巩磊,朱如凯,付晓飞,崔景伟,柳波
SU Xiaocen,GONG Lei,ZHU Rukai,FU Xiaofei,CUI Jingwei,LIU Bo

• 1:多资源协同陆相页岩油绿色开采全国重点实验室
• 2:东北石油大学地球科学学院
• 3:东北石油大学环渤海能源研究院
• 4:中国石油勘探开发研究院

摘要(Abstract)：

陆相页岩油储层中的天然裂缝系统是决定储层渗流特性和油气运移效率的关键因素。以松辽盆地古龙凹陷青山口组为研究对象，基于岩心观察及薄片分析，系统研究了构造裂缝与页理缝的发育特征、空间分布及控制因素，并揭示其在油气成藏过程中的地质意义。结果表明：构造裂缝多以高角度、多方向组合形式出现，具备良好的垂向连通性，主要受岩石脆性矿物含量、力学层厚度及断层活动的影响，表现出较强的空间异质性；页理缝则沿页理面近水平发育，密度高且分布均匀，主要受矿物组成、有机质丰度及热演化程度、构造抬升及异常高压等因素的控制，表现出明显平行页理分布规律和热演化驱动特征；2类裂缝通过多尺度、多方向的空间交织与渗流耦合，构建了复杂且高效的三维裂缝网络体系，显著提升了致密页岩储层的孔隙连通性和渗透率，促进了油气的赋存、运移与聚集。研究成果可为陆相页岩油的甜点评价、储层改造及高效开发提供理论指导和技术支撑。
Natural fracture system in continental shale oil reservoirs is the key factor determining reservoir flow characteristics and hydrocarbon migration efficiency. Taking Qingshankou Formation in Gulong Sag of Songliao Basin as research object, development characteristics, spatial distribution and controlling factors of structural fractures and lamellation fractures are systematically studied based on core observation, and thin section analysis, revealing their geological significance in hydrocarbon accumulation process.The results show that, structural fractures predominantly occur as high-angle, multi-directional combinations with good vertical connectivity,which are mainly controlled by brittle mineral content, mechanical layer thickness and fault activity, showing high spatial heterogeneity. Lamellation fractures develop nearly horizontally along bedding planes, with high density and uniform distribution,which are mainly controlled by mineral composition, organic matter abundance and thermal evolution degree, tectonic uplift and abnormal overpressure, showing obvious bedding-parallel patterns and thermal evolution-driven characteristics. The 2 fracture types form a complex and efficient 3D fracture network system through multi-scale and multi-directional spatial interweaving and flow coupling,significantly improving pore connectivity and permeability in tight shale reservoirs,thereby promoting hydrocarbon occurrence, migration and accumulation. The research provides theoretical guidance and technical support for sweet spot evaluation, reservoir stimulation and efficient development of continental shale oil.

关键词(KeyWords)： 陆相页岩油;天然裂缝;构造裂缝;页理缝;储层渗流;油气富集
continental shale oil;natural fractures;structural fractures;lamellation fractures;reservoir flow;hydrocarbon enrichment

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目“变质岩潜山多尺度裂缝耦合关系及网络结构模式研究”（42472191）和“中高熟陆相页岩油富集理论与绿色有效开发基础研究”（U24B6004）;; 中国国家留学基金管理委员会（CSC）项目“国家建设高水平大学公派研究生项目”（202408230148）和“国家公派高级研究学者、访问学者、博士后项目”（202408230103）

作者(Author): 宿晓岑,巩磊,朱如凯,付晓飞,崔景伟,柳波
SU Xiaocen,GONG Lei,ZHU Rukai,FU Xiaofei,CUI Jingwei,LIU Bo

DOI: 10.19597/J.ISSN.1000-3754.202509053

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