【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。更多还原

【Abstract】 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.更多还原