【摘要】 为分析套管-水泥-地层油气井系统压裂过程中水泥层的受力状态,根据系统中各结构层接触面上的位移连续条件以及弹性力学理论基础,得到了水泥层两界面的应力状态表达式;在有限元仿真软件中建立了井筒组合体力学模型,分析模型组合体在不同系统内压、水泥层材料参数以及施工误差等因素影响下水泥层的受力状态。结果表明内外载荷、水泥层材料参数以及偏心等因素都会对水泥层的受力产生一定影响。更多还原

【Abstract】 In order to analyze the stress state of the cement layer during the fracturing process of the casing-cement-formation oil and gas well system, the stress state expression of the two interfaces of the cement layer is obtained according to the displacement continuity condition on the contact surface of each structural layer in the system and the theoretical basis of elastic mechanics. A mechanical model of the wellbore assembly was established in the finite element simulation software to analyze the stress state of the cement layer under different factors such as internal pressure of the model assembly, cement layer material parameters and construction errors. The analysis results show that factors such as internal and external loads, cement material parameters, and eccentricity have a certain impact on the stress of the cement layer.更多还原