Fluid-rock interaction experiments with andesite at 100℃ for potential carbon storage in geothermal reservoirs  

作　　者：Grace E.Belshaw Elisabeth Steer Yukun Ji Herwin Azis Benyamin Sapiie Bagus Muljadi Veerle Vandeginste 

机构地区：[1]School of Chemistry,University of Nottingham,Nottingham,UK [2]GeoEnergy Research Centre,University of Nottingham,Nottingham,UK [3]British Geological Survey,Keyworth,UK [4]State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,China University of Mining and Technology,Xuzhou,China [5]PT Supreme Energy,Jakarta,Indonesia [6]Faculty of Earth Sciences and Technology,Institut Teknologi Bandung,Bandung,Indonesia [7]Faculty of Engineering,University of Nottingham,Nottingham,UK [8]Department of Materials Engineering,KU Leuven,Campus Bruges,Bruges,Belgium

出　　处：《Deep Underground Science and Engineering》2024年第3期369-382,共14页深地科学（英文）

基　　金：Engineering and Physical Sciences Research Council;Grant/Award Number:EP/M000567/1。

摘　　要：Geothermal energy extraction often results in the release of naturally occurring carbon dioxide(CO_(2))as a byproduct.Research on carbon storage using volcanic rock types other than basalt under both acidic and elevated temperature conditions has been limited so far.Our study uses batch reactor experiments at 100℃ to investigate the dissolution of andesite rock samples obtained from an active geothermal reservoir in Sumatra(Indonesia).The samples are subjected to reactions with neutral-pH fluids and acidic fluids,mimicking the geochemical responses upon reinjection of geothermal fluids,either without or with dissolved acidic gases,respectively.Chemical elemental analysis reveals the release of Ca^(2+)ions into the fluids through the dissolution of feldspar.The overall dissolution rate of the rock samples is 2.4×10^(–11)to 4.2×10^(–11)mol/(m^(2)·s),based on the Si release during the initial 7 h of the experiment.The dissolution rates are about two orders of magnitude lower than those reported for basaltic rocks under similar reaction conditions.This study offers valuable insights into the potential utilization of andesite reservoirs for effective CO_(2) storage via mineralization.

关 键 词：ANDESITE carbon sequestration geothermal reservoirs plagioclase dissolution 

分 类 号：P314[天文地球—固体地球物理学]