Well integrity represents an objective/solution for protecting human life and environment while retaining oil production rate during the life of the well. Characterization of cement behavior plays an important role in ensuring the well integrity and can be effectively considered when it comes to the prevention of casing failure. In this research, firstly, petrophysical data at one of the wells drilled into Maroon Oilfield in southwest of Iran was used to build a one-dimensional geomechanical model of the formation encompassing the well, based on which geomechanical characteristics of the formation were estimated. Subsequently, mechanical parameters of the cement sheath used in the considered well and the friction parameters of the cement-formation contact surface were determined via laboratory tests on samples of the cement. Next, using the obtained data and considering the environmental conditions in the well, a reference numerical model was constructed for a particular section of the studied well utilizing ABAQUS Software followed by analyzing the wellbore stability under existing conditions. Finally, sensitivity analysis and parametric studies were performed to investigate the impact of friction parameters of contact surfaces, and mechanical properties of the cement on the well integrity. The results indicated that, higher Young's modulus and/or lower Poisson's ratio, cohesion, and friction angle in the cement sheath further contributed to larger plastic strains in the sheath. Moreover, with increasing the friction of formation-cement and cement-casing contact surfaces, plastic strain of the cement was observed to decrease. In the parametric analysis, the coefficient of friction between cement-formation and cement-casing has decreased by About 45% and 60%, respectively, and the amount of PEEQ in cement increases by up to 30 mm.

井的完整性是保护人的生命和环境，同时在井的寿命中保持产油率的目标/解决方案。水泥行为的表征在确保井的完整性方面起着重要作用，在防止套管破裂方面可以有效地加以考虑。在这项研究中，首先，利用伊朗西南部Maroon油田钻探的其中一口井的岩石物理数据，建立了涵盖该井的一维地层力学模型，并据此估算了地层的地质力学特征。随后，通过对水泥样品的实验室测试，确定了所考虑的井中使用的水泥护套的机械参数和水泥形成接触面的摩擦参数。下一个，使用获得的数据并考虑井中的环境条件，使用ABAQUS软件为研究井的特定部分构建了参考数值模型，然后分析了在现有条件下的井眼稳定性。最后，进行了敏感性分析和参数研究，以研究接触面的摩擦参数以及水泥的机械​​性能对井的完整性的影响。结果表明，水泥护套中较高的杨氏模量和/或较低的泊松比，内聚力和摩擦角进一步导致了护套中较大的塑性应变。此外，随着地层水泥和水泥套管接触面的摩擦增加，观察到水泥的塑性应变降低。在参数分析中，