江陵凹陷深层富钾卤水井内降温析盐情况探讨  

Salting Law by Cooling Deep Potassium-bearing Brine in Jiangling Depression

作　　者：李瑞琴[1,2] 刘成林[2] 陈侠[1] 陈永志[2] 王春连[2] 

机构地区：[1]天津科技大学,天津300457 [2]中国地质科学院矿产资源研究所,北京100037

出　　处：《盐湖研究》2013年第1期1-6,共6页Journal of Salt Lake Research

基　　金：江陵凹陷深层富钾卤水勘查与开发利用(锦辉公司出资;中国地质科学院矿产资源研究所负责勘查)

摘　　要：江陵凹陷位于湖北省江汉盆地西南部,其赋存有高温高压深层富钾卤水,该卤水资源在开发过程中遇到的主要问题是采卤过程中的结盐堵井。不考虑压力等其它因素,只探讨单一因素温度对氯化钠溶解度的影响,资料分析显示在50～150℃之间时,温度与溶解度线性关系较好;探索了岗钾1井井内析盐规律,发现在井深为1 600～2 400 m时析盐量最大。根据此规律,建议采用注入淡水法,使井内卤水得到稀释,以达到防止结盐的目的;建议稀释到对氯化钠溶液浓度略小于28.3%,注水井深2 400 m。Jiangling depression is located in the southwest of Jianghan basin in Hubei province. The potas- sium-bearing brine with higher temperature and pressure had been discovered in Jiangling depression. The main problem is that salt plugs the well when the brine is mined. By consulting related materials, the geothermal temperature and depth in Jiangling depression is in a linear relationship. The paper focused on the influence of temperature on the solubility of NaCI. Data reveals that when the temperature is between 50~C and 150~C, the temperature is in good linear relationship with depth, only having a inflection point at 125~C. The research preliminarily explores the salting law in Gangjia 1 well, discovering that in the depth between 1 600 m and 2 400 m, the maximum salt separares out. According to the salting law, it＇ s suggested to inject fresh water to the well in order to dilute brine and prevent salt plugging the well. The solubility of NaCI should be less than 28.3% and the fresh water should be injected to the depth of 2 400 m.

关 键 词：江陵凹陷 岗钾1井 卤水 降温析盐 结盐堵井 

分 类 号：P619.211[天文地球—矿床学]