王海勇,潘哲君,冯子辉,李建智,姜海月,裴昌蓉,陈思琪,陈健奇,赵新文,王文涛,陈凤祥,张景远
Wang Haiyong,Pan Zhejun,Feng Zihui,Li Jianzhi,Jiang Haiyue,Pei Changrong,Chen Siqi,Chen Jianqi,Zhao Xinwen,Wang Wentao,Chen Fengxiang,Zhang Jingyuan

• 1:东北石油大学地球科学学院
• 2:多资源协同陆相页岩油绿色开采全国重点实验室
• 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)：

页岩油储层具有黏土矿物质量分数高、纳米孔隙发育、岩石颗粒小等特点，孔隙度、渗透率对应力影响更加敏感，为进一步研究页岩油储层不同岩性应力敏感性及其影响因素，对松辽盆地青山口组页岩油储层开展应力敏感性实验研究。通过覆压孔隙度和渗透率实验明确了其应力敏感性，通过X射线衍射、低温氮气吸附及岩石粒度分析等实验明确了页岩储层矿物组分、孔隙结构和颗粒大小以及与孔隙度损害率的耦合关系。结果表明，古龙页岩不同岩性应力敏感性不同，渗透率应力敏感性要远远高于孔隙度应力敏感性；应力敏感性与孔径、颗粒大小、黏土矿物质量分数、有机质含量密切相关，孔径越大、颗粒越小、黏土矿物质量分数越高、有机质含量越高，孔隙度损害率越大，应力敏感性越强。研究成果有助于优化页岩油储层敏感性评价实验方案、指导页岩油的效益开发，对于页岩油储量提交、成藏机理研究等具有重要意义。
Shale oil reservoirs are characterized by high clay mineral mass fraction, nano-pores development and small rock grains, and porosity and permeability are more sensitive to stress. In order to further study stress sensitivity of shale oil reservoirs with different lithologies and its influencing factors, experiment is carried out to study stress sensitivity of shale oil reservoirs in Qingshankou Formation of Songliao Basin. Stress sensitivity of shale reservoir is determined by overburden porosity and permeability experiments. Coupling relationships of mineral composition, pore structure and grain size with porosity damage rate are determined by X-ray diffraction, low-temperature nitrogen adsorption and rock grain size analysis. The results show that stress sensitivity of Gulong shale varies with different lithologies, and stress sensitivity of permeability is much higher than that of porosity. Stress sensitivity is closely related to pore size, grain size, mass fraction of clay mineral and organic content. The larger the pore size is, the smaller the grain size is, the higher the mass fraction of clay mineral is, the higher the organic content is, the higher the porosity damage rate is and the higher the stress sensitivity is. The research contributes to optimize experimental scheme of shale oil reservoir sensitivity evaluation and guide economic development of shale oil, being of great significance for shale oil reserves submission and accumulation mechanism research.

关键词(KeyWords)： 应力敏感性;古龙页岩;孔隙结构;颗粒大小;黏土矿物含量
stress sensitivity;Gulong shale;pore structure;grain size;clay mineral content

Abstract:

Keywords:

基金项目(Foundation): 黑龙江省自然科学基金联合基金重点项目“地层高温高压下页岩原位储集性参数测定与表征方法”（ZL2024D004）;; 黑龙江省“揭榜挂帅”科技攻关项目“古龙页岩油油藏工程理论、CO2提产机理及合理排采制度研究”（DQYT 2022-JS-758）;; 中国石油青年科技专项“不同类型页岩地层原位高温超压环境孔隙度评价模型及变化机理研究”（2024DQ03009）

作者(Author): 王海勇,潘哲君,冯子辉,李建智,姜海月,裴昌蓉,陈思琪,陈健奇,赵新文,王文涛,陈凤祥,张景远
Wang Haiyong,Pan Zhejun,Feng Zihui,Li Jianzhi,Jiang Haiyue,Pei Changrong,Chen Siqi,Chen Jianqi,Zhao Xinwen,Wang Wentao,Chen Fengxiang,Zhang Jingyuan

DOI: 10.19597/J.ISSN.1000-3754.202412021

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