察尔汗盐湖S4层晶间卤水的粘滞性

VISCOSITY OF STRATA S4 INTERCRYSTALLINE BRINE IN QARHAN SALT LAKES

1991年 9月— 1 994年 1 2月 ,经 3年半的粘度测知 ,0 5m水深处 ,察尔汗盐湖晶间卤水运动粘滞系数多年平均值为 3 0 68× 1 0 - 2 cm2 /s;3 0m水深处 ,多年平均值为 3 32 4×1 0 - 2 cm2 /s;6 0m水深处 ,多年平均值为 4 0 94× 1 0 - 2 cm2 /s;9 0m水深处 ,多年平均值为5 71 7× 1 0 - 2 cm2 /s;1 2m水深处 ,多年平均值为 5 2 0 7× 1 0 - 2 cm2 /s。从 1 991年 9月— 1 994年 1 2月 ,各卤水深处卤水运动粘滞系数不论是年均值还是月均值均随时间推移而逐渐减小。1 992年 3月— 1 994年 1 2月期间 ,多年来 ,3月份卤水运动粘滞系数为 3 473× 1 0 - 2 cm2 /s,6月份为 3 390× 1 0 - 2 cm2 /s,9月份为 3 496× 1 0 - 2 cm2 /s,1 2月份为 2 576× 1 0 - 2 cm2 /s。由此看出 ,9、3、6月份的值较高 ,1 2月份的较低。晶间卤水运动粘滞系数 (v)等值线基本上是南北走向分布 ,即自东而西减小 ,首采区v值较低 ;表层卤水粘滞系数小 ,深部卤水粘滞系数较大。从 1 991年 9月— 1 992年 1 2月 ,各年份卤水运动粘滞系数的平均值均随卤水深度增加而增加。卤水的粘度系数除与温度及不同种类盐的溶液有关外 ,在察尔汗这种多种盐类组成的卤水中 ,其卤水的运动粘滞系数比重在 1 2 0— 1 30范围内时 。

Three and half years' determination of viscosity of strata S4 intercrystalline brine from 1991 to 1994, shows that the kinematic viscosity coefficient has a positive relationship with its concentration, but a negative with one temperature in Qarhan Salt Lakes. Besides, at the same temperature, if the type of brine positive ions are mainly dominated by Mg 2+ , then its viscosity will be the biggest, but if dominated by K +, then it will be the smallest and the condition of Na + is between that of Mg + and K +. On the other hand, considering negative ions, obviously that of sulphate's is bigger than the type of chloride. As for verticle space, the kinematic viscosity coefficient increases with brine depth and horizontally it becomes smaller and smaller from East to West; In times from 1991 to 1994, the brine kinematic viscosity coefficient decreases gradually as a whole trend weather for annual averages or monthly averages, but during the same year, viscosity is relatively bigger in March, June, September than that in December.