Research articles
ScienceAsia 50 (2024):ID 2024075 1-10 |doi:
10.2306/scienceasia1513-1874.2024.075
CO2-brine-rock interactions in Permian carbonate formations, North-eastern Thailand
Thitiphan Assawincharoenkija,b, Piyaphong Chenraia,b,c,*, Sukonmeth Jitmahantakulb,c, Falan Srisuriyachaid, Soraya Suninbuna, Kanit Laosritrakula, Chawisa Phujareanchaiwone
ABSTRACT: This study described the results of carbon dioxide-brine-rocks interactions of carbonate rock samples from
the Pha Nok Khao (PNK) and the Huai Hin Lat (HHL) Formations in Thailand. The aim of this study was to investigate
geochemical and physical changes in carbonate formations commonly used for long-term storage of carbon dioxide
(CO2
). The samples were classified into five lithological facies: fractured limestone, grained limestone, mud limestone,
dolomite, and sandstone. The mineral compositions and textures of the samples were analyzed by using petrography,
X-ray diffraction (XRD), X-ray fluorescence (XRF), and Inductively Coupled Plasma-Optical Emission Spectrometer (ICPOES). The results revealed changes in geochemical and physical properties after soaking the samples in CO2
-dissolved
brine water. When exposed to low pH CO2
-brine water, mineral compositions in carbonate rocks such as dolomite,
quartz, and calcite undergo dissolution, leading to increased porosity. The study identified lithology, formation of
brine water, and effective porosity as key control factors in CO2
-brine-rock interactions. The findings suggested that
long-term CO2
storage in the PNK carbonate reservoirs might not be useful due to its potential dissolution in an acidic
environment. The dissolution could affect the bulk porosity and strength of the reservoir formation leading to fracture
failure after hundreds of years of CO2
injection. This study had implications on the feasibility of carbon capture and
storage strategies, highlighting the need for further investigation and consideration of alternative storage options.
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| a |
Applied Mineral and Petrology Special Task Force for Activating Research (AMP STAR), Department of Geology,
Faculty of Science, Chulalongkorn University, Bangkok 10330 Thailand |
| b |
Basin Analysis and Structural Evolution Research Unit (BASE RU), Department of Geology, Faculty of Science,
Chulalongkorn University, Bangkok 10330 Thailand |
| c |
MSc Program in Petroleum Geoscience, Faculty of Science, Chulalongkorn University, Bangkok 10330 Thailand |
| d |
Department of Mining and Petroleum Engineering, Faculty of Engineering, Chulalongkorn University,
Bangkok 10330 Thailand |
| e |
Department of Earth Sciences, Faculty of Science, Kasetsart University, Bangkok 10900 Thailand |
* Corresponding author, E-mail: Piyaphong.c@chula.ac.th
Received 9 May 2023, Accepted 9 May 2024
|
