鄂尔多斯盆地马家沟组二氧化碳地质封存有利区优选  

Optimization of favorable areas for carbon dioxide geological storage in Majiagou Formation in Ordos Basin

作　　者：路萍[1,2] 白勇 刘伟刚 陈曦 郑化安 刘杰 陈永振 高建平 LU Ping;BAI Yong;LIU Weigang;CHEN Xi;ZHENG Hua’an;LIU Jie;CHEN Yongzhen;GAO Jianping(Department of Geology,State Key Laboratory of Continental Dynamics,Northwest University,Xi’an,710069;Shaanxi Provincial Institute of Energy Resource and Chemical Engineering,Xi’an,710069)

机构地区：[1]西北大学地质系/大陆动力国家重点实验室,西安710069 [2]陕西省能源化工研究院,西安710069

出　　处：《地质论评》2021年第3期816-827,共12页Geological Review

基　　金：国家重点研发计划项目(编号:2019YFE0100100)的成果。

摘　　要：CO2地质封存(CCS)技术是目前国际上实现CO2大规模低成本减排的最佳选择之一,而CO2地质封存的首要问题是CO2封存有利区优选。针对鄂尔多斯盆地马家沟组CO2地质封存有利区优选研究不足的现状,本文借助大量的地质、钻井、地球物理及测试分析,对鄂尔多斯盆地马家沟组地层水矿化度条件、温压条件、储层条件、构造条件及盖层条件进行研究分析,从而对CO2地质封存区域边界进行确定。在此基础上,出于CO2地质封存技术性和经济性考虑,进一步再优选出储层条件优越、距离CO2捕集装置较近、勘探程度较高、地层埋深合适且对其他矿产开发影响甚微的地区进行CO2地质封存。结果表明:(1)确定鄂尔多斯盆地适宜CO2地质封存的地区位于摆宴井—沙井子断裂以东、渭北隆起北缘断裂以北、黄河断裂以西、伊盟隆起以南的广大地区,主要包括伊陕斜坡和天环坳陷内的除中央古隆起缺失区以外的马家沟组分布地区;(2)乌审旗—靖边—延安岩溶斜坡区(Ⅰ1)为盆内最佳CO2地质封存区;(3)榆林—米脂岩溶盆地区(Ⅰ2)是CO2地质封存的有利场所。Objective:CO2 geological storage(CGS)technology is currently one of the best international options for achieving large-scale low-cost CO2 emission reduction,and the primary issue of CGS is the selection of favorable areas for CO2 storage.In view of the insufficient research on the optimization of the favorable area for CGS in the Ordos Basin,this paper mainly optimizes favorable areas suitable for CGS in the Majiagou Formation in the Ordos Basin.Methods:Firstly,we determine the boundary of the CGS area in the whole Basin through the study of formation water conditions,basic physical conditions,reservoir conditions,structural conditions and caprock conditions with a help of a large amount of geological,drilling,geophysical and laboratory experimental data.Results:After determining the boundary of the CGS area,it can be optimized to carry out CO2 geological sequestration in the areas with favorable reservoir conditions,relatively close to CO2 emission sources,high degree of exploration,appropriate depth of formation and little impact on other mineral development.Conclusions:Combined with the early research,we make a conclusion that:(1)The areas suitable for geological storage of CO2 in the Ordos Basin are located in the east of the Baiyanjing—Shajingzi fault,the north of the northern margin of the Weibei uplift,the west of the Yellow River fault,and the south of the Yimeng uplift,mainly including Iraq The Majiagou Formation in the Shaanxi Slope and Tianhuan Depression except for the missing area of the central paleo-uplift;(2)The Wushenqi—Jingbian—Yan’an karst slope area(Ⅰ1)is the best CGS in the basin Area;(3)Yulin—Mizhi karst basin area(Ⅰ2)is a favorable place for CGS.

关 键 词：CO2地质封存 有利区优选因素 岩溶斜坡区 马家沟组 鄂尔多斯盆地 

分 类 号：P618.13[天文地球—矿床学]