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通过室内单轴劈裂拉伸、单轴压缩和三轴压缩等试验,获得某油田H-1井多夹层盐岩力学性能参数,回归得到相应的Mohr-Coulomb准则表达式,并利用ABAQUS软件对多夹层盐穴储气库进行了数值模拟计算,分析了储气库的埋深、顶跨、顶部盐岩厚度、顶部相邻夹层厚度及弹性模量等参数对多夹层盐穴储气库最小允许运行压力的影响规律。结果表明:储气库最小允许运行压力随着顶跨的增加而升高,随着顶部相邻夹层弹性模量的增加而降低,而顶部盐岩和相邻夹层厚度对其影响不显著。研究成果可为多夹层盐岩地层储气库的安全运行提供参考。
Through uniaxial tensile splitting, uniaxial compression and triaxial compression tests, the mechanical properties of multi-layered salt rock in H-1 well of a certain oilfield were obtained. The corresponding Mohr-Coulomb criterion expressions were obtained by regression and the ABAQUS software was used Multi-layered salt cavern gas reservoir was calculated by numerical simulation. The effects of gas reservoir depth, top span, top salt thickness, top adjacent interlayer thickness and elastic modulus on the multi-layered salt cavern gas reservoir were analyzed. Allow the impact of operating pressure rules. The results show that the minimum allowable operating pressure of gas reservoir increases with the increase of head span and decreases with the increase of the elastic modulus of the adjacent top sandwich, while the thickness of top salt rock and adjacent interlayer has no significant effect on it. The research results can provide references for the safe operation of gas reservoirs in multi-salt rock stratum.