In response to global warming, it is important to explore alternative disposal technologies for greenhouse gas emissions in the geothermal power sector. One alternative which has received widespread focus is co-injection of non-condensable gases with the waste fluids from geothermal operations.

Passarella et al. (2015) simulated the interaction between brine with dissolved CO₂ and H₂S, and a sample of greywacke in their laboratory. The present work aimed to numerically model the results from the experiment using TOUGHREACT. The goal of this study was to develop numerical simulation techniques to investigate the effects of the reinjection of brine with dissolved NCG. The resulting model provided insights into the geochemical interaction of greywacke with brine-NCG solutions under simulated reservoir conditions. The numerical simulations show that mineral dissolution occurred to a greater degree than precipitation, leading to increased permeability and porosity. It was also observed that the mineral reactive surface areas evolved as mineral dissolution progressed, through etch pit formation. Additionally, flow rate had an impact on the overall reaction rates such that a decrease in injection rate led to a corresponding decrease in reaction rates. Lastly, both experimental data and model outputs indicated that CO₂ was minimally sequestered in the simulation, while H₂S was clearly captured as pyrite.

A similar numerical investigation was conducted on the co-injection of NCG with steam condensates subsequently. The modelling results indicate predominant mineral dissolution, CO₂ is expected to be captured as magnesite within the reactor, while H₂S is still captured as pyrite.

为了应对全球变暖，重要的是探索地热发电部门中温室气体排放的替代处置技术。一种备受关注的替代方法是将不可冷凝气体与地热作业产生的废液一起注入。

Passarella等。（2015）模拟了盐水与溶解的CO ₂和H ₂之间的相互作用。S，以及他们实验室中的greywacke样品。本工作旨在使用TOUGHREACT对实验结果进行数值建模。这项研究的目的是开发数值模拟技术，以研究溶解的NCG注入盐水的影响。所得模型提供了在模拟储层条件下格里瓦克与盐水-NCG溶液的地球化学相互作用的见解。数值模拟表明，矿物的溶解程度比降水的溶解程度大，从而导致渗透率和孔隙度的增加。还观察到，通过蚀刻坑的形成，矿物反应性表面积随着矿物溶解的进行而演化。此外，流速对总反应速率有影响，以致注入速率的降低导致反应速率的相应降低。最后，实验数据和模型输出均表明在模拟中，₂被最小限度地隔离，而H ₂ S被清楚地捕获为黄铁矿。

随后对NCG与蒸汽冷凝物的共注入进行了类似的数值研究。模拟结果表明主要的矿物溶解，预计反应器内会将CO ₂捕获为菱镁矿，而将H ₂ S仍捕获为黄铁矿。