低渗透油藏污染井流入动态通式及影响因素研究  

General formula for inflow performance in low permeability reservoir and the influential factors

作　　者：王厉强[1] 王洪辉[1] 李彦[2] 赵子刚 郭子仪 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [2]中国石化胜利油田分公司胜利工程设计咨询有限责任公司,山东东营257026 [3]中国石油青海油田分公司采油一厂,甘肃敦煌736202 [4]中国石油青海油田分公司钻采工艺研究院,甘肃敦煌736202

出　　处：《大庆石油地质与开发》2007年第1期88-91,共4页Petroleum Geology & Oilfield Development in Daqing

摘　　要：基于低渗透非达西渗流理论及对Kro/Boμ函数形态的分析,推导了低渗污染井在油藏饱和及未饱和状态下的无因次流入动态表达式,并对影响无因次流入动态的因素进行了敏感性研究。结果表明,低渗透油藏中启动压力梯度、污染程度和供给半径对无因次流入动态都有较显著的影响。结合胜利油田某井产量递减分析,表明该通式能有效地预测和分析油井动态。无因次流入动态通式及敏感性分析结果可为低渗透油藏的现场开发实践提供理论依据。Based on the non-Darcy percolation theory in low permeability reservoir and analysis of the function Kro/Boμ, a dimensionless IPR equation for damaging well in low permeability reservoir both under saturated and unsaturated states is derived. Furthermore, a sensitivity research on factors which influence the IPR curve is made. The result shows that the kick - off pressure gradient, degree of damage and supply radius have remarkable effect on IPR in low permeability reservoir. Combined with the production decline analysis of a well in Shengli Oilfield, the fact is confirmed that this method can effectively predict and analyze the oil well performance. The dimensionless IPR equation and the result of sensitivity research can provide the development practice in low permeability reservoir with academic support.

关 键 词：低渗透油藏 启动压力梯度 污染 流入动态 

分 类 号：TE33[石油与天然气工程—油气田开发工程]