A review of oil well cement alteration in CO2-rich environments

Bagheri, Mozhgan; Shariatipour, Seyed M.; Ganjian, Eshmaiel

doi:10.1016/j.conbuildmat.2018.07.250

Cited by 66 publications

(47 citation statements)

References 95 publications

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“…Thus, it can be considered that assessing the CO 2 degradation process in the quasi-static state is appropriate, since many of the cementation defects (e.g. voids, mud channels, small fractures) are not extensive enough to allow considerable fluid flows, and that most of the literature evaluates the integrity of the well materials in a static environment (Bagheri et al, 2018;Teodoriu and Bello, 2020). To simulate the quasi-static condition in the wet carbonation experiments, the top of the cement-casing specimens showing interfacial defect was kept open to allow a material exchange flow with the reactive medium.…”

Section: Cement-casing Specimensmentioning

confidence: 99%

“…As long-term CO 2 storage is the objective of CCS projects (Guthrie et al, 2018), it is possible to point out that fluid leakage is the main perceived risk associated with these projects (Iyer et al, 2018;Onishi et al, 2019). In this context, the wellbore integrity is identified as the most critical issue to the CCS infrastructure since it may provide a https://doi.org/10.1016/j.ijggc.2020.103077 Received 10 October 2019; Received in revised form 18 May 2020; Accepted 22 May 2020 pathway for fluid to escape from the subsurface environment to shallow formations or, in the worst scenario, back to the surface (Bagheri et al, 2018;Li and Nygaard, 2018). Thus, preserving the wellbore integrity throughout the project's operational life cycle (construction, injection, monitoring and abandonment) is a key issue for CCS effectiveness (Omosebi et al, 2017;Postma et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Wellbore integrity in a saline aquifer: Experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin

Vecchia

Santos

Schütz

et al. 2020

International Journal of Greenhouse Gas Control

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From our work, significant progress has been made in understanding the degradation of cement-casing systems. The CO 2 degradation process was evaluated in specimens with a large interfacial defect, such as large annular spaces, voids and/or channels, which may be the result of a poor cementing job. From the experiments showing no interfacial defect, no signs of degradation were observed, while from experiments showing interfacial defect, both the cement and steel undergo significant degradation. In the well casing, the CO 2 -rich brine affects the steel phase, leaching Fe 2+ ions into solution and promoting FeCO 3 precipitation on the material surface, while on the cement sheath, two processes are occurring: (i) the portlandite dissolution and (ii) the cement carbonation process. Then, iron (Fe 2+ ) starts to migrate into the cement structure, compromising the material's self-healing and pore-blocking features, while calcium (Ca 2+ ) starts to compose the corrosion film from the formation of mixed carbonates (Fe x Ca y CO 3 ) so reducing the corrosion layer's protection. Finally, both ions (Ca 2+ and Fe 2+ ) become so abundant in the material vicinity that they may form calcium carbonate (CaCO 3 ) on the corrosion layer and iron carbonate (FeCO 3 ) in the cement matrix. Thus, from our results, the degradation mechanisms of the cement-casing system in CO 2 -rich brine was revised.

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Section: Cement-casing Specimensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wellbore integrity in a saline aquifer: Experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin

Vecchia

Santos

Schütz

et al. 2020

International Journal of Greenhouse Gas Control

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“…The utility of their addition to cement is two-fold: the elimination of waste and the enhancement of the cement. These additions are understood as technological solutions, designed to improve both the performance of high-strength cements and cement behavior against aggressive environmental agents [4]. Hence, the incorporation of these additions to cement can be seen as an attempt to reduce manufacturing costs, while simultaneously searching for materials that are more respectful towards the environment.…”

Section: Introductionmentioning

confidence: 99%

Reusing Discarded Ballast Waste in Ecological Cements

García

Gaya

2019

Materials

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Numerous waste streams can be employed in different cement production processes, and the inclusion of pozzolans will, moreover, permit the manufacture of concrete with improved hydraulic properties. Pozzolanic materials can be added to Ordinary Portland Cement (OPC) in the range of 10%–20% by mass of cement. One such example is the phyllosilicate kaolinite (K), and its calcined derivative metakaolin (MK), incorporated in international cement manufacturing standards, due to its high reactivity and utility as a pozzolan. In the present paper, discarded ballast classed as Construction and Demolition Waste (C&DW) is reused as a pozzolanic material. Various techniques are used to characterize its chemical, mineralogical, and morphological properties, alongside its mechanical properties, such as compressive and flexural strength. Discarded ballast in substitution of cement at levels of 10% and 20% produced type II or IV pozzolanic cements that yielded satisfactory test results.

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“…CO2-bearing fluids react with the cement matrix and penetrate the cement matrix due to either of the diffusion or the advection phenomena (Druckenmiller and Maroto-Valer, 2005;Haghi et al, 2017). Usually, the diffusion is responsible for the permeation of CO2-bearing fluids into the cement matrix, while the advection almost acts on the cement surfaces in cracks, the cement-casing interface, and the cementrock interface (Huet, Prevost and Scherer, 2010;Deremble et al, 2011;Duguid, Radonjic and Scherer, 2011;Gherardi, Audigane and Gaucher, 2012;Bagheri, Shariatipour and Ganjian, 2018). The permeation of CO2-bearing fluids accompanied by so-called carbonation process (Scherer and Huet, 2009;Huet, Tasoti and Khalfallah, 2011;Kari, Puttonen and Skantz, 2014;Ashraf, 2016;Šavija and Luković, 2016;Rezagholilou, Papadakis and Nikraz, 2017).…”

Section: Introductionmentioning

confidence: 99%

Durability of oilwell cement in CO2-rich environments

Bagheri¹,

Shariatipour²,

Ganjian

2019

Sustainable Construction Materials and Technologies (SCMT)

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The anthropogenic emissions of carbon dioxide (CO2) into the atmosphere is considered as one of the main reasons for global warming. The injection of CO2 into underground formations is an immediate to mid-term option to decrease the level of this gas in the atmosphere. Depleted oil and gas reservoirs are among the best candidates for the carbon capture and storage projects (CCS). The reason for this is based on the well-characterised structure of these type of underground formations through the different periods of their life. One of the most concerned problems associated with CCS projects is CO2 leakage through well cements. Oilwell cements exposed to CO2-bearing fluids undergo geomechanical and geochemical changes which may endanger their integrity. This paper aims at providing a framework to predict the lifespan of a cement exposed to CO2-bearing fluid using numerical modelling based on coupling geochemical and geomechanical processes. The main processes of the radial compaction and the radial cracking are investigated. It was shown that the radial cracking process leads to a definite lifespan of the cement matrix after being exposed to CO2-bearing fluids, while the radial compaction process can increase the durability of the cement matrix. Generally, this process becomes more effective with increasing the radial stress on the cement sheath from the surrounding rocks.

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A review of oil well cement alteration in CO2-rich environments

Cited by 66 publications

References 95 publications

Wellbore integrity in a saline aquifer: Experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin

Wellbore integrity in a saline aquifer: Experimental steel-cement interface degradation under supercritical CO2 conditions representative of Brazil’s Parana basin

Reusing Discarded Ballast Waste in Ecological Cements

Durability of oilwell cement in CO2-rich environments

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