摘要
针对微裂缝发育的页岩油储层物理性质和渗流机制过于复杂、油藏开采难度较大的问题,深入分析了微裂缝发育页岩油储层非线性渗流特性,以提高开采效率。选取某大型含油气叠合盆地作为研究对象,利用ABAQUS软件模拟微裂缝发育页岩油储层,分析其非线性渗流特性。模拟结果表明,所构建的非线性渗流模型,有效模拟了微裂缝发育页岩油储层的压力分布;伴随渗流距离的增加,不同基质渗透率以及裂缝长度时,储层的基质内压力与渗流速度逐渐降低,呈现典型的非线性变化趋势;渗流距离对渗流速度有显著的负向影响,伴随流体流动距离的增加,受阻力等因素影响,渗流速度降低。油藏开采时,需要针对不同渗透率的区域,合理控制裂缝长度,提高开采效率。
In response to the complex physical properties and seepage mechanisms of shale oil reservoirs with microcrack development,and the difficulty of reservoir exploitation,a deep analysis of the nonlinear seepage characteristics of shale oil reservoirs with microcrack development was conducted to improve exploitation efficiency.A large superimposed basin containing oil and gas was selected as the re-search object,and the nonlinear seepage characteristics of shale oil reservoir developed by microcrack were analyzed by ABAQUS soft-ware.The simulation results show that the nonlinear seepage model can effectively simulate the pressure distribution of shale oil reser-voirs with microcrack.With the increase of seepage distance,with different matrix permeabilities and fracture lengths,the pressure and seepage velocity in the reservoir matrix gradually decrease,showing a typical nonlinear trend.Seepage distance has a significant negative impact on seepage velocity.With the increase of fluid flow distance,seepage velocity decreases due to factors such as resistance.When oil reservoir is exploited,it is necessary to control the fracture length reasonably for different permeability areas and improve the exploi-tation efficiency.
作者
王猛
余亮
朱腾腾
陈雨露
贺振华
Wang Meng;Yu Liang;Zhu Tengteng;Chen Yuu;He Zhenhua(Gas Production Plant of Yanchang Gas Field,Shaanxi Yanchang Petroleum(Group)Co.,Ltd.)
出处
《能源与环保》
2025年第8期82-87,97,共7页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
陕西省科技厅2024年自然科学基础研究计划项目(2024JC-YBQN-0347)。
关键词
微裂缝发育
页岩油储层
非线性
渗流特性分析
基质渗透率
裂缝长度
microcrack development
shale oil reservoir
nonlinear
analysis of seepage characteristics
matrix permeability
crack length
作者简介
王猛(1986-),男,吉林通化人,高级工程师,硕士,现从事天然气勘探开发工作。
