Petrographic-mineralogical and textural changes in reservoir and sealing rocks (Zaosie anticline) as a result of a long-term experiment in CO2-brine-rock interactions

Carbon capture and storage (CCS) has been identified as an urgent, strategic and essential approach to reduce anthropogenic CO2 emissions, and mitigate the severe consequences of climate change. CO2 storage is the last step in the CCS chain and can be implemented mainly through oceanic and underground geological sequestration, and mineral carbonation. This review paper aims to provide state-of-the-art developments in CO2 storage. The review initially discussed the potential options for CO2 storage by highlighting the present status, current challenges and uncertainties associated with further deployment of established approaches (such as storage in saline aquifers and depleted oil and gas reservoirs) and feasibility demonstration of relatively newer storage concepts (such as hydrate storage and CO2-based enhanced geothermal systems). The second part of the review outlined the critical criteria that are necessary for storage site selection, including geological, geothermal, geohazards, hydrodynamic, basin maturity, and economic, societal and environmental factors. In the third section, the focus was on identification of CO2 behaviour within the reservoir during and after injection, namely injection-induced seismicity, potential leakage pathways, and long-term containment complexities associated with CO2-brine-rock interaction. In addition, a detailed review on storage capacity estimation methods based on different geological media and trapping mechanisms was provided. Finally, an overview of major CO2 storage projects, including their overall outcomes, were outlined. This review indicates that although CO2 storage is a technically proven strategy, the discussed challenges need to be addressed in order to accelerate the deployment of the technology. In addition, beside the necessity of technoeconomic aspects, public acceptance of CO2 storage plays a central role in technology deployment, and the current ethical mechanisms need to be further improved.

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“…Formation and dissolution of minerals can affect the rock porosity and consequently change the capacity of the host reservoir [52].…”

Section: Saline Aquifersmentioning

confidence: 99%

A review of developments in carbon dioxide storage

et al. 2017

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“…The tested samples were placed on the Petri dishes in glass cylinders (reservoir rocks and cap rocks separately) positioned in the reactors, and inundated with artificially prepared brine so as not to come to direct contact with the rock and the walls of the reactor (Wdowin et al 2013 A set of the closed reactors was connected with a CO 2 -containing cylinder. The duration of experiment was 20 months, at room temperature (20-25°C) at the container-gas pressure (i.e.…”

Section: Methodsmentioning

confidence: 99%

“…Considering these phenomena during planning of CO 2 storage projects reduces risks of gas leakage from the underground reservoir, and consequent failure of the storage operation (Wdowin et al 2013(Wdowin et al , 2014.…”

Section: Introductionmentioning

confidence: 99%

CO2-brine-rock interactions as a result of long term experiment onto rock samples from Chabowo anticline, Poland

Wdowin

Tarkowski

Manecki

2013

geol

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Abstract:The presented work concerns investigations of CO 2 -brine-rock interactions conducted over a period of 20-months. Experiments were carried out at laboratory scale with the use of equipment specifically designed for this purpose. Research materials (reservoir and cap rocks) were taken from the Chabowo 3 well located within Chabowo anticline. The experiments were carried out at room temperature (about 25ºC) and pressure about 6 MPa. For samples before and after the experiment a numerous investigations were carried out i.e. petrophysical (porosity, surface area, threshold diameter, average capillary, framework and bulk densities) and petrological-mineralogical characteristics. Also brine used for examination before and after experiment was analyzed (chemical analysis). Petrophysical results have shown a significant decrease of porosity (from 17.0% to 7.5%) and surface area (from 0.395 m 2 /g to 0.196 m 2 /g) in case of sandstone. These changes are caused probably by crystallization of halite in pore spaces, because mineralogical analysis (XRD) has shown the presence of halite (3-5% vol. in the rock) after experiment. More detailed results were obtained during mineralogical analyses of thin sections. These results have shown in sandstone samples a small increase of porosity and a small decrease of feldspar and cements (carbonate and clay) as well as matrix which suggests dissolution of these constituents. For claystone -after experiment XRD clay fraction has shown absence of clay minerals such as montmorillonite, which may also be caused by interaction between the rock, CO 2 and brine. Dissolution of some minerals is evidenced by chemical analysis of brine where amounts of most tested ions increase after experiment for both sandstone and claystone.

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Section: Carbon Capture and Sequestrationmentioning

confidence: 99%

“…261 It should be noted that the formation and dissolution of minerals are two uncertain factors that may affect the porosity of reservoirs, thereby leading to the misjudgment of the reservoir capacity. 262 Depleted and developing oil and gas reservoirs. Injecting CO 2 in depleted or developing oil and gas reservoirs is now considered to be one of the most effective storage options.…”

Section: Carbon Dioxide Sequestrationmentioning

confidence: 99%