摘要
以沁水盆地南部煤层注CO_2过程中矿物的溶解作用为研究内容,运用PHREEQC进行数值模拟。研究表明:方解石和白云石在地层水中的溶解度随温度增加而降低,随CO_2分压增大而增大;一定盐度区间内,盐效应可增加矿物的溶解度;同离子效应会降低矿物的溶解度,当地层水中部分阳离子含量高时不利于煤层气开采,但对煤层进行碳封存有利。
The mineral dissolution in coal bed water of southern Qinshui basin was mainly studied.Numerical simulation is carried out by using PHREEQC. Research shows that the solubility of calcite and dolomite in coalbed water decreases with the increase of temperature, and increases with CO2 partial pressure increased. Salt effect increase the solubility of minerals within a certain range. Common ion effect decrease the solubility of minerals. High content of calcium ion, magnesium ion or potassium ion in coalbed water is not conducive to enhance CBM Recovery, but is conducive to coal carbon sequestration.
作者
贾立龙
高莎莎
JIA Li-long;GAO Sha-sha(Xi'an Research Institute, China Coal Technology and Engineering Group Corp, Xi'an 710077, China;School of Earth Science and Resources,Chang'an University, Xi'an 710064,China)
出处
《煤炭技术》
CAS
2019年第3期89-91,共3页
Coal Technology
基金
国家自然科学基金青年科学基金项目(41502153)
中央高校基本科研业务费专项资金资助(300102278101)
