应力敏感性对低渗透气井产能的影响

我国低渗透气藏资源丰富,是今后天然气开发的重要领域。然而,低渗透气藏在开发中具有较强的应力敏感性,影响气藏的产能建设,因此,认清应力敏感性对低渗透气藏产能的影响是开发的基础。文中在对低渗透气藏岩心进行应力敏感伤害实验研究的基础上,考虑气藏含气饱和度为100%和不同含水饱和度的情况,模拟分析了在低渗透气藏开发过程中应力敏感性所产生的渗透率变化规律,从而得出在不同应力敏感系数和不同渗透率情况下应力敏感性对气井产能的影响程度,为低渗透气藏合理开发提供依据。

Influence of stress sensitivity on gas well productivity for low permeability gas reservoir

The resources of low permeability gas reservoirs are rich in our country,which is an important direction of natural gas development in the future.However,low permeability gas reservoirs have strong stress sensitivity,influencing the productivity construction of gas reservoir.Therefore,recognizing the influence of stress sensitivity on gas well productivity in low permeability gas reservoir becomes very urgent in the development process.Based on the experimental study on the stress sensitivity damage of cores from low permeability gas reservoir,this paper considered the gas saturation of 100% and different water saturation,simulated and analyzed the permeaility change law caused by stress sensitivity in the process of low permeability gas reservoir development,thus obtaining the influence degree of stress sensitivity on gas well productivity under the conditions of different stress sensitivity coefficient and permeability,which provided the basis for rational development of low permeability gas reservoirs.