本文采用限元工具建立实际水平井眼弹塑性模型,结合有效塑性应变准则,在某气田原地地应力及岩石强度参数的基础之上,研究了酸化前后井壁稳定性的变化情况,地层压力衰竭后井壁稳定性情况及它们对完井方式选择的影响,研究表明酸化措施对完井方式的选择有较大影响,酸化前可采用裸眼完井,在酸化后需采用支撑井壁类的完井方式,地层压力衰竭也对完井方式选择有一定影响。 Based on the in-situ stress and rock strength parameters of a gas field, the change of wellbore stability before and after acidification was studied by using the finite element tool to establish the actual horizontal wellbore elastoplastic model. Combined with the effective plastic strain criterion, the formation pressure After failure, the stability of wellbore wall and their influence on the choice of completion method have been studied. The results show that the acidification measures have a great influence on the choice of completion method. Before the acidification, the openhole completion can be used. After acidification, Completion methods, formation pressure failure also have some impact on the choice of completion method.