Fluid seepage into rock pores not only generates poroelastic stress but also exerts seepage force on the rock skeleton. However, since the mechanism of the effect of seepage force on the stress field around the wellbore is not clear, conventional methods calculate the stress field only taking into account the poroelastic stress without the coupled effects of seepage force and rock deformation. Based on the theory of porous medium, this paper presents an analytical solution of the circumferential stress field formed by the seepage force around the wellbore and introduces the solution into traditional calculation models to overcome these issues. The numerical study by MATLAB^® was used to simulate the stress field around the wellbore. Numerical simulation results show that the seepage force generates a circumferential tensile action and reduces in-situ circumferential compressive stress around the wellbore. Under the effect of seepage force, the effective circumferential stress around the wellbore becomes smaller. When considering seepage force, effective circumferential stress along the θ = 0 direction at the wellbore wall is reduced by about 32% compared with traditional numerical results. In addition, the circumferential stress field formed by the seepage force increases the possibility of rock failure at the well wall. The analytical results indicate that the seepage force should be considered in the stress field calculation around the wellbore, especially in reservoirs with low permeability.

流体渗入岩石孔隙中不仅会产生孔隙弹性应力，而且还会在岩石骨架上施加渗流力。但是，由于渗流力对井筒周围应力场的影响机理尚不清楚，因此常规方法仅考虑多孔弹性应力来计算应力场，而没有渗流力和岩石变形的耦合作用。基于多孔介质理论，本文提出了一种由井眼周围的渗流力形成的周向应力场的解析解，并将该解引入了传统的计算模型以克服这些问题。通过MATLAB数值研究^®用来模拟井眼周围的应力场。数值模拟结果表明，渗流力产生了周向拉力并减小了井眼周围的原位周向压应力。在渗透力的作用下，井眼周围的有效周向应力变小。考虑渗流力时，沿θ的有效圆周应力 与传统的数值结果相比，井眼壁= 0方向减少了约32％。另外，由渗流力形成的周向应力场增加了井壁处岩石破裂的可能性。分析结果表明，在井眼周围的应力场计算中应考虑渗透力，特别是在低渗透性油藏中。