低渗透非均质油藏油水两相渗流敏感系数理论模型

Sensitivity of Two-Phase Non-Darcy Flow of in Low-Permeability Heterogeneous Reservoirs

本文研究了低渗透油藏低速非达西油水两相渗流的反问题 ,建立了基于动态信息的油藏敏感系数计算模型 ,给出了井底压力和水油比关于渗透率和孔隙度的敏感系数的有效算法 ,为油藏数值模自动拟合和油藏精细描述算法提供了理论基础 .

We have obtained theoretically equations for computing sensitivity coefficients of wellbore pressures and water-oil ratio on two-phase problems in low-permeability heterogeneous reservoirs based on Wu's rigorous adjoint method. The equations are simplified into the Darcy flow case when the threshold pressure gradient is equal to zero. Our method can be used to estimate reservoir parameters as well as to solve strong nonlinear inverse problems.