深部盐岩溶解速率试验研究

Experimental Research on Dissolution Rate of Salt Rock in Depth

利用自制仪器对某超深地层(约2000m)盐岩、含泥盐岩进行了常温和高温溶解试验,发现密度与时间关系呈现指数衰减,并对其参数进行了拟合,得出常温下纯盐岩的溶解速率是含泥盐岩的1.26倍,高温86℃和高温50℃时的溶解速率分别是常温下的2.32和1.49倍。根据质量守恒原理,分别推导得出了常温和高温下溶解速率与密度的函数关系。通过实验数据得出,常温和高温下溶解速率与密度都可以近似成线性关系,并对各个参数进行了拟合,为深部盐岩溶腔建腔模拟提供了基本参数。

Dissolution experiment of salt rock and mud - contai- ning salt rock from some extra - deep stratum was made under normal temperature and high temperature using self - made de- vices. And it was found out that the density of solution was expo- nentially decaying with time, some parameters were obtained by fitting. The dissolution rate of salt rock is 1.26 times of that of mud - containing salt rock under normal temperature, and the dissolution rate of salt rock under 86℃ is 2.32 times of that un- der normal temperature, while the dissolution rate under 50℃ is 1.49 times of that under normal temperature. Based on the mass conservation principle, the function relationships between disso- lution rate and the density of solution under normal temperature and high temperature have been deduced. The experimental data present that the relationships between dissolution rate and the density of solution under normal and high temperature can be considered to be linear approximately, and the parameters have been fitted which are useful to the model of the process of dissol- ving cavity.