地层多孔介质中地层水蒸发盐析研究进展

Research progress of formation water evaporation and salting out in formation porous media

近年来地下储气库发展迅速,为了解决地下储气库注采过程中地层出现的结盐问题,针对储气库周期性运行过程中注气期和采气期两个阶段,研究地层的温度和压力等条件发生变化时造成地层存在不同程度的结盐现象,得出地下储气库结盐主要原因是由于高矿化度的地层水蒸发作用导致盐析结晶。对地层多孔介质内水分蒸发扩散热力学条件方面研究进行了总结。

In recent years,underground gas storage has developed rapidly.In order to solve the problem of salt formation in underground gas storage during injection and production,the temperature and pressure of stratum is studied for the two phases of gas injection and gas production during the periodic operation of the gas storage.When the conditions such as temperature and pressure change,there are different degrees of salt formation in the formation.It is concluded that the main reason for salt formation in underground gas storage is the salt precipitation and crystallization due to the evaporation of formation water with high salinity.Therefore,this paper summarizes the research on the thermodynamic conditions of water evaporation and diffusion in the formation porous media.