Reactive Transport Modeling of Long-Term CO2 Sequestration Mechanisms at the Shenhua CCS Demonstration Project,China

作     者：Guodong Yang Yilian Li Aleks Atrens Danqing Liu Yongsheng Wang Li Jia Yu Lu 

作者机构：School of Environmental StudiesChina University of GeosciencesWuhan 430074China The Queensland Geothermal Energy Centre of ExcellenceSchool of Mechanical and Mining EngineeringThe University of QueenslandSt Lucia Qld 4072Australia China Shenhua Coal Liquefaction Co.Ltd.OrdosOrdos 017209China The Administrative Center for China's Agenda 21Beijing 100038China 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2017年第28卷第3期

页      面：457-472页

核心收录：

学科分类：083002[工学-环境工程] 083001[工学-环境科学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the Global Climate and Energy Project(No.2384638-43106-A) the National Natural Science Foundation of China(No.41072180) the Special Scientific Research Fund of Public Welfare Profession of the Ministry of Land and Resources of China(No.201211063) a bilateral project of China Australia Geological Storage of CO2 Project Phase 2(CAGS2) 

主　　题：carbon capture and storage(CCS) CO2 sequestration geochemical interaction mineral trapping CCS demonstration project reactive transport modeling 

摘      要：Carbon dioxide injection into deep saline aquifers results in a variety of strongly coupled physical and chemical processes. In this study, reactive transport simulations using a 2-D radial model were performed to investigate the fate of the injected CO2, the effect of CO2-water-rock interactions on mineral alteration, and the long-term CO2 sequestration mechanisms of the Liujiagou Formation sandstone at the Shenhua CCS（carbon capture and storage） pilot site of China. Carbon dioxide was injected at a constant rate of 0.1 Mt/year for 30 years, and the fluid flow and geochemical transport simulation was run for a period of 10 000 years by the TOUGHREACT code according to the underground conditions of the Liujiagou Formation. The results show that different trapping phases of CO2 vary with time. Sensitivity analyses indicate that plagioclase composition and chlorite presence are the most significant determinants of stable carbonate minerals and CO2 mineral trapping capacity. For arkosic arenite in the Liujiagou Formation, CO2 can be immobilized by precipitation of ankerite, magnesite, siderite, dawsonite, and calcite for different mineral compositions, with Ca（2＋）, Mg（2＋）, Fe（2＋） and Na＋ provided by dissolution of calcite, albite（or oligoclase） and chlorite. This study can provide useful insights into the geochemistry of CO2 storage in other arkosic arenite（feldspar rich sandstone） formations at other pilots or target sites.