CO2 migration and distribution in multiscale-heterogeneous deep saline aquifers

Journal Article (2021)
Author(s)

Jie Ren (Hohai University)

Yuan Wang (Hohai University)

Di Feng (Hohai University)

J. Gong (Hohai University, TU Delft - Reservoir Engineering)

Research Group
Reservoir Engineering
Copyright
© 2021 Jie Ren, Yuan Wang, Di Feng, J. Gong
DOI related publication
https://doi.org/10.46690/ager.2021.03.08
More Info
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Publication Year
2021
Language
English
Copyright
© 2021 Jie Ren, Yuan Wang, Di Feng, J. Gong
Research Group
Reservoir Engineering
Issue number
3
Volume number
5
Pages (from-to)
333-346
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Abstract

Large volumes of carbon dioxide (CO2) captured from carbon emission source can be stored in deep saline aquifers as a mean of mitigating climate change. The deep saline aquifers are naturally heterogeneous at multiple scales. It is important to generate representative multiscale heterogeneous fields of various hydrogeologic properties and understand storage safety by studying CO2 migration and distribution in such fields. In this work, a new multiscale heterogeneous model with partly fine multi-facies heterogeneous domain is proposed. A method based on transition probability theory is referred to establish a multi-facies model. A new multiscale heterogeneous model with partly fine multi-facies heterogeneous domain is built up according to the categorized permeability data obtained from the Geological Carbon Storage Frio site in USA. TOUGH2/ECO2N is applied to simulate CO2 migration and distribution in such a multiscale heterogeneous model. The CO2 plume shows obvious viscous fingering and non-uniform migration both in layered and vertical directions, implying vertical and horizontal heterogeneity which cannot be represented by a single-scale model or simulated with the assumption of homogeneous formation. The profile of CO2 migration shown in the numerical simulation at a time of 10 days is in a good accordance with the seismic data of Frio situ in qualitative and quantitative aspects.