摘要
根据流体在特低渗透多孔介质中的渗流特征,考虑储层渗透率随压力梯度的变化规律,建立了变渗透率渗流油藏数学模型。在黑油模型基础上,提出了特低渗透油藏变渗透率数值模拟方法,并对吉林油田红75特低渗透区块进行数值模拟计算。模拟结果表明:在特低渗透油藏开发过程中,拟线性渗流仅发生在井筒及人工压裂缝附近小部分区域内,地层大部分区域内发生变渗透率渗流,变渗透率渗流占地层渗流的主导地位。以变渗透率渗流油藏数学模型为基础的数值模拟方法能够更准确地预测特低渗透油藏的动态开发特征。
According to the percolation characteristics of fluid in ultra-low permeability porous media,and conNo.5 Abstract IXsidering the reservoir permeability varying with the pressure gradient,the mathematical model of the variable permeabilityreservoir is established.Based on the black oil model,the method of the variable permeability numericalsimulation for the ultra-low permeability reservoir is presented,the variable permeability numerical simulation isapplied for the Hong 75 block of ultra-low permeability reservoir in Jilin Oilfield.The simulation results show thatthe reservoir permeability reaches constant in a small range near the wellbore while the variable permeability percolationplays a dominant role in the fluid percolation of formation.The variable permeability percolation numericalsimulation can predict the percolating process of the fluid in the low permeability porous media more exactly.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第5期98-103,195-196,共6页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家自然科学基金项目(10672187)
中国石油天然气股份公司重点科技攻关项目(06-02A-02-01)
关键词
特低渗透
数学模型
变渗透率
渗流
数值模拟
ultra-low permeability
mathematical model
variable permeability
percolation
numerical simulation
