TITLE:
CO2 Geological Storage Suitability Assessment of Sichuan Basin
AUTHORS:
Jijiao Fan, Jianqiang Guo, Senqi Zhang, Xiaofeng Ji
KEYWORDS:
Suitability Evaluation, Sichuan Basin, Geological Storage of Carbon Dioxide, Tectonic Unit
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.2 No.11,
October
28,
2014
ABSTRACT: The paper chooses the secondary tectonic units
of Sichuan Basin as the evaluation object, and considers regional crustal stability
conditions, basic geological conditions, reservoir and cap rock conditions, storage
potential conditions, geothermal conditions, research degree and potential resources
conditions, social and economic conditions as first-level indexes. Based on collected
data and a comprehensive analysis of 16 level-two indexes and 9 level-three indexes,
and with the application of comprehensive index method, the conclusions regarding
the suitability partition of the secondary tectonic units of Sichuan Basin are as
follows: Central Sichuan low-flat structural belt is highly suitable for carbon
dioxide geological storage, West Sichuan low-slope structural belt is relatively
suitable, and SW low-slope structural belt is unsuitable for carbon dioxide geological
storage, South Sichuan low-slope structural belt is relatively unsuitable, whereas
East Sichuan high-slope faulted fold belt, and North Sichuan low-flat structural
belt are fairly suitable for carbon dioxide geological storage. Based on the above,
with a comprehensive analysis of corresponding hydrographic and geological conditions,
and at the same time considering the non-cov- ered oil or gas resources and the
buried structure, six CO2 geological target formations are identified, including
lower Jurassic Ziliujing Group, upper Triassic Xujiahe Group, middle Triassic Leikoupo
Group, lower Triassic Jialingjiang Group and Feixianguan Group, and lower Permian
Qixia Group. This paper provides an important guidance and reference for the selection
criteria of CO2 geologic storage sites in Sichuan Basin.