陈挺,吕琦,孙志刚,于春磊,王硕桢,高云龙
CHEN Ting,Lü Qi,SUN Zhigang,YU Chunlei,WANG Shuozhen,GAO Yunlong

• 1:中国石化胜利油田分公司勘探开发研究院
• 2:中国石化页岩油气勘探开发重点实验室
• 3:山东省非常规油气勘探开发重点实验室
• 4:中国石化胜利油田博士后科研工作站

摘要(Abstract)：

为形成一种适用于济阳坳陷页岩油储层渗流特征参数的高效而且精确的测试方法，基于一维非稳态渗流模型，建立了非稳态页岩油流动实验方法，分析不同裂缝发育情况下页岩的液测渗透率和启动压力梯度。结果表明：非稳态压力恢复法可准确测试页岩渗透率，测试时间可缩短约90%；由于气液两相间基础物性的巨大差异，液测渗透率约为气测渗透率的0.47%～2.83%；结合数值仿真和压力衰竭测试，可获得页岩液测启动压力梯度（101～102 MPa/m），其随着渗透率的增加呈幂指数递减；层理贯穿缝发育可显著降低页岩的启动压力梯度；相较于稳态法测试，非稳态压力衰竭法测试启动压力梯度数值略小。研究成果可为页岩油储层渗流参数的高效实验测试及开发方案的制定提供技术支撑。
In order to develop an accurate and effective method for testing flow characteristics parameters of shale oil reservoirs in Jiyang Depression, an unsteady shale oil flow experiment method is established based on 1D unsteady flow model, so as to analyze liquid measured permeability and startup pressure gradient of shale with different fracture development conditions. The results show that unsteady pressure buildup method can be used to accurately measure shale permeability, shortening testing time by about 90%. Due to much difference of basic properties between gas and liquid phases, liquid measured permeability is about 0.47%～2.83% of gas measured permeability.Combining with numerical simulation and pressure depletion test gets liquid measured startup pressure gradient of shale(101～102 MPa/m), which decreases exponentially with permeability increase. Development of bedding penetrating fractures can significantly reduce shale startup pressure gradient. Compared with steady state test, startup pressure gradient tested by unsteady state pressure depletion method is slightly lower. The research provides technical support for efficient experimental testing of shale oil reservoir flow parameters and development plan design.

关键词(KeyWords)： 页岩油;非稳态测试;渗流特征;裂缝发育;启动压力梯度;济阳坳陷
shale oil;unsteady state test;flow characteristics;fracture development;startup pressure gradient;Jiyang Depression

Abstract:

Keywords:

基金项目(Foundation): 中国石油化工股份有限公司项目“基质型页岩油流动规律表征方法研究”（KL22007）;中国石油化工股份有限公司项目“东营凹陷页岩油开发优化关键技术研究”（P21060-2）

作者(Author): 陈挺,吕琦,孙志刚,于春磊,王硕桢,高云龙
CHEN Ting,Lü Qi,SUN Zhigang,YU Chunlei,WANG Shuozhen,GAO Yunlong

DOI: 10.19597/J.ISSN.1000-3754.202303023

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