水文地质工程地质2018，Vol.45Issue(2)：109-116,8.DOI:10.16030/j.cnki.issn.1000-3665.2018.02.17
地质封存二氧化碳沿断层泄漏数值模拟研究
Numerical simulation of CO2 leakage along faults from geologic carbon dioxide sequestration
摘要
Abstract
Safety and storage performance are the most attracting issues for geological CO2 storage (GCS),in which the site uncertainties caused by faults/fractures are complex.Based on the reservoir multiphase flow simulator TOUGH2/ECO2N,the time,the CO2 leakage rate and the amount of leakage from the deep saline aquifer along the fault were studied under various conditions.The results of 15 site-scale models show that the CO2 injection scheme,fault properties (location,occurrence,geometry,and structure) and the combination of rock formations in the system have effects on CO2 leakage.Under the same reservoir environment and fault occurrence conditions,the CO2injection rate increases from 1.59 kg/s to 6.34 kg/s,the CO2 leakage occurs 3 706 days earlier and the leakage amount increases by 32.43％ in 20 years.The effect of fault location on CO2 storage is significant.In this study,a fault located at 100 m from the injection well will cause the CO2 leakage to be as high as 63.39％ of the injection after 20 years.Under the same conditions,the inclination/ narrow faults have less effect on the leakage of CO2 and brine than the vertical/ thick faults.An increase in the fault permeability by one time can lead to the leakage of CO2 to increase by 2.11％ and the leakage rate to increase by 0.006 ～0.01 kg/s.关键词
CO2地质封存(GCS)/咸水层/CO2泄漏/断层/TOUGH2Key words
geological CO2 storage (GCS)/saline aquifer/leakage/fault/TOUGH2分类
天文与地球科学引用本文复制引用
张志雄,谢健,戚继红,胡立堂,张可霓,吴礼舟..地质封存二氧化碳沿断层泄漏数值模拟研究[J].水文地质工程地质,2018,45(2):109-116,8.基金项目
国家能源应用技术研究及工程示范项目(NY20111102-1) （NY20111102-1）
多源同汇地下水流系统水动力弥散混合特征沙槽模型研究(41402223) （41402223）
