CAJ | 학술논문

查明煤中矿物质在不同温度和 CO2分压条件下溶解度变化规律，能为注入 CO2过程中煤储层渗透率分析提供重要依据。借助水文地球化学模拟软件 PHREEQC对在不同温度和CO2分压条件下煤中各矿物的溶解度进行了水化学模拟，得出不同温度和 CO2分压条件下矿物质溶解度的变化规律。结果表明：在无CO2分压时，随着温度的升高各矿物的溶解度增加；当溶液中CO2分压增加到一定程度时，随着温度的升高各矿物的溶解度降低(石英除外)；在温度相同时，随着 CO2分压的增加，所有矿物(石英除外)溶解度均增加，方解石的溶解度随着 CO2分压的升高呈现出迅速增加的趋势，其他矿物随着CO2分压的升高，溶解度增加的速率较为缓慢。
사명매중광물질재불동온도화 CO2분압조건하용해도변화규률，능위주입 CO2과정중매저층삼투솔분석제공중요의거。차조수문지구화학모의연건 PHREEQC대재불동온도화CO2분압조건하매중각광물적용해도진행료수화학모의，득출불동온도화 CO2분압조건하광물질용해도적변화규률。결과표명：재무CO2분압시，수착온도적승고각광물적용해도증가；당용액중CO2분압증가도일정정도시，수착온도적승고각광물적용해도강저(석영제외)；재온도상동시，수착 CO2분압적증가，소유광물(석영제외)용해도균증가，방해석적용해도수착 CO2분압적승고정현출신속증가적추세，기타광물수착CO2분압적승고，용해도증가적속솔교위완만。
Identification of the variation regularities of solubility of coal minerals under different temperature and CO2 partial pressure can provide an important basis for the analysis of coal reservoir permeability during CO2 in-jection. With the hydrogeochemistry software-PHREEQC, hydrochemical simulation was conducted for the solu-bility of coal minerals under the different temperature and CO2 partial pressure conditions, the variation of coal mineral solubility under different temperature and CO2 partial pressure was obtained. The results showed that when there was no CO2 partial pressure, the solubility of the minerals increased with the rise of temperature, when CO2 partial pressure of the solution increased to certain extent, the solubility of the minerals except for quartz decreased with the rise of temperature, at the same temperature and with the increase of CO2 partial pressure, the solubility of all minerals except for quartz increased, the solubility of calcite showed rapid increase with the increase of CO2 partial pressure, but other minerals showed slow increase in solubility.