低渗油藏流固耦合效应及其应用

以渤南油田义37块沙三^8低渗油层为例，研究了低渗透油藏流固耦合效应及其对低渗透油藏开发的影响。低渗油藏变形包括弹性应变和塑性应变两种机理，随着有效压力逐渐增加，岩样渗透率逐步下降，岩石从弹性应变逐渐转变为塑性应变，二者之间存在转换机制；本文通过对实验结果的分析，建立了低渗储层渗透率随应力变化模型，分析了流固耦合对渤南低渗透油田开发的影响，为低渗透油藏开发方案调整提供依据。

Fluid-solid coupling effect in low permeability rocks and its application

The low permeability Sha III8 formation of Yi 37 of Bonan oilfield is used to study the fluid-solid coupling effect and its effect to the development of low permeability reservoir.The experiment of permeability measurement at the continuous confining pressure showed that the permeability decreases continuously with the confining pressure increases.During this process,the core changes from viscoelastic strain to deformation behavior between which there is a critical point.The effect of fluid-solid coupling t...