酸性溶液对碳酸盐岩溶蚀实验

Experimental Simulation of Dissolution of Carbonate Rocks in Acid Solution

通过模拟高温、高压条件下酸性溶液对碳酸盐岩溶解实验,实验结果表明,其他条件相同时,酸性溶液优先溶蚀灰质白云岩中方解石成分;在设定温度、压力范围内方解石溶蚀量总是大于白云石溶蚀量。以CO_2水溶液作为反应溶液时,温度、压力条件对碳酸盐岩的溶蚀有控制作用,在埋藏较浅地区下方解石溶蚀量最大,当温度、压力条件更低或更高时方解石溶蚀量相对较低;相比于方解石,白云石溶蚀量相对较低。

Dissolution experiment of carbonate rocks in acid solution under simulated high temperature and pressure conditions was carried out. The results show that, under the same conditions, acid solution can preferentially dissolve the calcite component in dolomite;the ability of dissolution of dolomite is lower than the ability of dissolution of calcite. Temperature and pressure control the dissolution of carbonate rocks,and the maximum ability of dissolution is at 20 Mpa/45 ℃; while with the increase of burial depth, dissolution of dolomite is at a low level.