论文部分内容阅读
良好的腔体形状有利于围岩应力释放,能够有效提高盐穴储气库的安全稳定性。基于等应力轴比理论设计了一种椭球形状腔体,并将该椭球腔体形状与前人设计的圆柱腔体、顶部放大腔体和底部放大腔体形状在盐穴有效库容量损失、盐穴腔壁破损区大小、腔壁顶底板变形大小、腔壁底板变形大小4个方面进行对比分析,结果表明:基于等应力轴比理论设计的腔体在变形、受力方面更为合理,能够在储气库运行过程中保持有效库容量,溶腔周围破损区域最少,顶底板变形值最小。进一步说明盐穴储气库的形状设计是由盐穴腔体所处位置的地应力场及盐穴储层的材料共同决定的。
Good cavity shape is conducive to rock stress release, can effectively improve the safety and stability of salt cavern gas storage. An ellipsoidal cavity is designed based on the theory of isobaric axial ratio. The shape of the ellipsoid cavity is similar to that of the cylindrical cavity, the top amplification cavity and the bottom amplification cavity in the former. , The size of the damaged cavity of the salt cavity, the deformation of the top and bottom of the cavity wall, and the deformation of the cavity wall were compared and analyzed. The results show that the cavity based on the theory of equal stress axis is more reasonable in terms of deformation and force , Which can maintain the effective storage capacity during operation of the gas storage, minimize the damage area around the dissolution chamber, and minimize the deformation of the top and bottom plates. It is further explained that the shape design of salt cavern gas reservoir is determined by the field stress field of salt cavern cavity and the material of salt cavern reservoir.