Parametric study on the integrity of wellbores in CO2 storage sites
Title
Parametric study on the integrity of wellbores in CO2 storage sites
Subject
Carbon capture
Carbon dioxide
Oil wells
Petroleum reservoir engineering
Boreholes
Oil field equipment
Oil well drilling
Petroleum reservoirs
Cements
Abandoned wells
Oil well cementing
Description
Carbon capture and storage is considered as an amelioration technique to address the increasing level of carbon dioxide in the atmosphere. Depleted oil and gas reservoirs are potential candidates for the long sequestration of the captured carbon dioxide. The huge number of drilled oil and gas wells in these hydrocarbon reservoirs around the world, however, pose a threat to the integrity of geological CO2 storage projects. These wells are direct connections to the Earth's surface and even when capped, any defects in their structure can become high leakage pathways. To predict the consequences of this possible loss, a model was developed and introduced by the authors based on coupling the geochemical and geomechanical alterations benefitting from a plastic-damage model. This model simulates the alteration of the rock-cement-casing assemblage in abandoned wells for carbon storage sites. In this paper, a parametric study has been established to investigate the wellbore integrity at various conditions found underground. The results show that separation at the cement-casing interfaces is highly probable in injection wells. The abandoned wells will maintain their integrity within the first thousand years after exposure to CO2-bearing fluids. Our observations suggest that the compaction of the cement-rock interfacial transition zone helps the cement sheath maintain its integrity for a longer period of time. 2020 Elsevier Ltd
268
Publisher
Construction and Building Materials
Date
2021
Contributor
Bagheri, Mohammadreza
Shariatipour, Seyed M.
Ganjian, Eshmaiel
Type
journalArticle
Identifier
9500618
10.1016/j.conbuildmat.2020.121060
Collection
Citation
“Parametric study on the integrity of wellbores in CO2 storage sites,” Lamar University Midstream Center Research, accessed May 15, 2024, https://lumc.omeka.net/items/show/25852.