呼图壁地下储气库部分区域地表垂直形变机理研究

Research on surface vertical deformation in the Hutubi underground gas storage reservoir

摘要:

利用在呼图壁地下储气库开展的2013～2015年7期二等水准测量获得的高差数据，对受地表气井压力变化影响而发生的地下储气库地表垂直变形进行了分析。研究表明，呼图壁地下储气库区的地表变形除了构造成因引起的盆地下沉以外，其他成因有2个方面：一个是呼图壁地区的地下水超采影响着该地区的地表垂直变化；另一个是储气库集采气期间受井口压力变化影响的地表沉降，根据计算，储气库每MPa气井压力变化影响到的地表变化为0.625～1.125mm。

Abstract:

In this paper，we use the elevation data collected from the Hutubi underground gas storage reservoir during the 7 periods of the second leveling surveying from 2013 to 2015 and analyze the vertical deformation caused by the gas well pressure of the underground gas storage reservoir. The research has shown that tectonic origin is the basic influence of sedimentation for the Hutubi underground gas storage reservoir. Other influences fall into two aspects：Groundwater overdraft in Hutubi influences the vertical variation of the surface in this region. The land surface changed by per unit pressure of gas storage affects about 0.625～1.125mm.