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Micro- and macroscale consequences of interactions between CO2 and shale rocks

Micro- and macroscale consequences of interactions between CO2 and shale rocks

Category
Academic literature review
Abstract
In carbon storage activities, and in shale oil and gas extraction (SOGE) with carbon
dioxide (CO2) stimulation fluid, CO2 comes into contact with shale rock and its pore fluid. As a
reactive fluid, the injected CO2 displays a large potential to modify the shale’s chemical, physical,
and mechanical properties, which need to be well studied and documented. The state of the art on
shale–CO2 interactions published in several review articles does not exhaust all aspects of these
interactions, such as changes in the mechanical, petrophysical, or petrochemical properties of shales.
This review paper presents a characterization of shale rocks and reviews their possible interaction
mechanisms with different phases of CO2. The effects of these interactions on petrophysical,
chemical and mechanical properties are highlighted. In addition, a novel experimental approach is
presented, developed and used by our team to investigate mechanical properties by exposing shale
to different saturation fluids under controlled temperatures and pressures, without modifying the
test exposure conditions prior to mechanical and acoustic measurements. This paper also underlines
the major knowledge gaps that need to be filled in order to improve the safety and efficiency of
SOGE and CO2 storage
Client
  • Research Council of Norway (RCN) / 268445
  • EC/H2020 / 764531
Language
English
Affiliation
  • SINTEF Industry / Petroleum
Year
2020
Published in
Energies
ISSN
1996-1073
Publisher
MDPI
Volume
13:1167
Issue
5
Page(s)
1 - 30