非均质渗透率构型低渗透油藏产能计算及反演参数分析

Productivity calculation and inversion theoretical research on permeability heterogeneous configuration parameters

基于非均质油藏渗透率构型的3种非固定常数的典型分布模式,考虑低渗透油藏启动压力梯度函数的影响,将渗透率构型引入到启动压力梯度函数表征方程,推导考虑启动压力梯度和渗透率非均质构型下的产能计算公式,建立利用生产动态资料反演渗透率构型参数的优化算法;利用压力梯度、产量及启动压力梯度特征参数,确定注采井间的、渗透率构型的非均质分布特征参数。数值模拟结果表明:文中优化算法合理,有利于完善低渗透非均质油藏的渗流理论,可为油藏精细描述和开发挖潜提供支持。

Based on three nonlinear permeability distribution configurations of heterogeneous reservoir,and considering threshold pressure gradient function,to build model of productivity formula.Established dynamic production data inversion algorithm,it can be achieved inverse parameter characteristics of threshold pressure gradient function.Result of numerical simulation is reasonable and feasible,it helps improve theory of low permeability reservoirs,and further provide technical basis to determine fine description and corresponding measures for field.