静态密闭状态下大甸子井孔隙度与体积压缩系数时序特征分析  

Analysis of the Porosity and Temporal Characteristics of the Volume Compression Coefficient of the Dadianzi Well in a Static and Hermetically Sealed State

作　　者：梁莹[1] 张立丰[1] 李惠[1] 

机构地区：[1]内蒙古自治区地震局,内蒙古呼和浩特010010

出　　处：《地震工程学报》2015年第4期1103-1108,共6页China Earthquake Engineering Journal

基　　金：震情跟踪项目(2015010305)

摘　　要：以内蒙古大甸子观测井为数据收集对象,利用原始水位观测数据得到该井静态密闭下气压系数、水位与气压的关系以及孔隙度与气压系数的关系,从而分析该井静态密闭状态下孔隙度与体积压缩系数时序特征。结果表明,孔隙度与固体骨架的体积压缩系数和含水层内水的体积压缩系数间存在幂函数关系;在第一象限内,各井含水层介质固体骨架的体积压缩系数随着孔隙度的增大而增大;含水层内水的体积压缩系数随着孔隙度的增大而减小。This study analyzes the relationship between porosity and temporal characteristics of the volume compressibility coefficient of the Dadianzi well and provides reliable data and information for earthquake prediction.Data from the Dadianzi well are digitized data of the water level that are checked by data processing and are used because the well observation system is relatively stable,the measuring instrument works properly,and the observed data have high reliability.On the basis of relevant theories from mechanics,elasticity,and fluid mechanics,making use of the elastic state of the aquifer medium and a three-phase change model of material volume,the porosity,volume compression coefficient of the solid skeleton,and volume compression coefficient of water in the aquifer were calculated using digitized data of the well water level.The results show that there exists a power function relation among the three aforementioned factors.In the first quadrant,the volume compression coefficient of the well aquifer solid skeleton increases with an increase in porosity,whereas the volume compression coefficient of water decreases with an increase in porosity.

关 键 词：大甸子井水位 静态密闭 孔隙度 体积压缩系数 

分 类 号：P618.13[天文地球—矿床学]