Understanding the chemico-mineralogical changes of caprock sealing in deep saline CO2 sequestration environments: a review study

D. W. Jayasekara; P. G. Ranjith; W. A.M. Wanniarachchi; T. D. Rathnaweera

doi:10.1016/j.supflu.2020.104819

Understanding the chemico-mineralogical changes of caprock sealing in deep saline CO₂ sequestration environments: a review study

D. W. Jayasekara, P. G. Ranjith, W. A.M. Wanniarachchi, T. D. Rathnaweera

Civil & Environmental Engineering

Research output: Contribution to journal › Review Article › Research › peer-review

58 Citations (Scopus)

Abstract

The long-term CO₂ storage in deep saline aquifers mainly depends on the performance of caprock. However, one of the major concerns with deep saline CO₂ sequestration at geological time scales is the back-migration of injected CO₂ through the caprock due to chemico-mineralogical variations with time. Several studies, including geo-chemical models and laboratory tests, have investigated the behaviours of caprock in the presence of CO₂. This paper reviews laboratory and numerical studies of the geo-chemical properties of caprock, highlights the gaps in research and provides suggestions for future research on caprock characteristics in deep saline aquifers after CO₂ injection. Accordingly, a significant attention should be paid on potential field scale caprock reactivity in long term scale associated with geological CO₂ sequestration.

Original language	English
Article number	104819
Number of pages	15
Journal	Journal of Supercritical Fluids
Volume	161
DOIs	https://doi.org/10.1016/j.supflu.2020.104819
Publication status	Published - 1 Jul 2020

Keywords

Caprock
Deep saline aquifers
Geo-chemical models
Geo-chemical properties
Laboratory analyses

Access to Document

10.1016/j.supflu.2020.104819

Cite this

@article{426959ae49e74ca4ab2976bc79e09a1e,

title = "Understanding the chemico-mineralogical changes of caprock sealing in deep saline CO2 sequestration environments: a review study",

abstract = "The long-term CO2 storage in deep saline aquifers mainly depends on the performance of caprock. However, one of the major concerns with deep saline CO2 sequestration at geological time scales is the back-migration of injected CO2 through the caprock due to chemico-mineralogical variations with time. Several studies, including geo-chemical models and laboratory tests, have investigated the behaviours of caprock in the presence of CO2. This paper reviews laboratory and numerical studies of the geo-chemical properties of caprock, highlights the gaps in research and provides suggestions for future research on caprock characteristics in deep saline aquifers after CO2 injection. Accordingly, a significant attention should be paid on potential field scale caprock reactivity in long term scale associated with geological CO2 sequestration.",

keywords = "Caprock, Deep saline aquifers, Geo-chemical models, Geo-chemical properties, Laboratory analyses",

author = "Jayasekara, \{D. W.\} and Ranjith, \{P. G.\} and Wanniarachchi, \{W. A.M.\} and Rathnaweera, \{T. D.\}",

note = "Funding Information: The authors would like to acknowledge the authors and researchers of all the literature cited in this paper. In addition, we thank Lilian Khaw, a graduate research student academic support lecturer at Monash University, for her comments, which greatly improved the manuscript. Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = jul,

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doi = "10.1016/j.supflu.2020.104819",

language = "English",

volume = "161",

journal = "Journal of Supercritical Fluids",

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T2 - a review study

AU - Jayasekara, D. W.

AU - Ranjith, P. G.

AU - Wanniarachchi, W. A.M.

AU - Rathnaweera, T. D.

N1 - Funding Information: The authors would like to acknowledge the authors and researchers of all the literature cited in this paper. In addition, we thank Lilian Khaw, a graduate research student academic support lecturer at Monash University, for her comments, which greatly improved the manuscript. Publisher Copyright: © 2020

PY - 2020/7/1

Y1 - 2020/7/1

N2 - The long-term CO2 storage in deep saline aquifers mainly depends on the performance of caprock. However, one of the major concerns with deep saline CO2 sequestration at geological time scales is the back-migration of injected CO2 through the caprock due to chemico-mineralogical variations with time. Several studies, including geo-chemical models and laboratory tests, have investigated the behaviours of caprock in the presence of CO2. This paper reviews laboratory and numerical studies of the geo-chemical properties of caprock, highlights the gaps in research and provides suggestions for future research on caprock characteristics in deep saline aquifers after CO2 injection. Accordingly, a significant attention should be paid on potential field scale caprock reactivity in long term scale associated with geological CO2 sequestration.

AB - The long-term CO2 storage in deep saline aquifers mainly depends on the performance of caprock. However, one of the major concerns with deep saline CO2 sequestration at geological time scales is the back-migration of injected CO2 through the caprock due to chemico-mineralogical variations with time. Several studies, including geo-chemical models and laboratory tests, have investigated the behaviours of caprock in the presence of CO2. This paper reviews laboratory and numerical studies of the geo-chemical properties of caprock, highlights the gaps in research and provides suggestions for future research on caprock characteristics in deep saline aquifers after CO2 injection. Accordingly, a significant attention should be paid on potential field scale caprock reactivity in long term scale associated with geological CO2 sequestration.

KW - Caprock

KW - Deep saline aquifers

KW - Geo-chemical models

KW - Geo-chemical properties

KW - Laboratory analyses

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