Geological Storage of CO&lt;sub&gt;2&lt;/sub&gt; to Enhance Coalbed Methane Production

Zhang, Bei Bei; Song, X

doi:10.4028/www.scientific.net/amr.524-527.1173

Cited by 3 publications

(2 citation statements)

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“…The depth of CO 2 burial is generally more than 800 m, to achieve the supercritical state of CO 2 ( T > 31.1 °C, P > 7.38 MPa). The geological structures used for CCS generally include abandoned oil fields, unworkable gas fields, saline aquifers, and infertile coal mines. − At the same time, scientists use the collected CO 2 to displace reservoir oil and drive gas (natural gas, coalbed methane), improving the efficiency of mining. − …”

Section: Introductionmentioning

confidence: 99%

Effects of Impurities on CO₂ Sequestration in Saline Aquifers: Perspective of Interfacial Tension and Wettability

Chen

Chai

Shen

et al. 2017

Ind. Eng. Chem. Res.

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In recent years, the reduction of CO 2 emissions has become a joint effort throughout the world, and carbon capture and sequestration (CCS) is an effective approach to solving the problem of CO 2 emissions. In the present study, the effects of adding CH 4 , Ar, and H 2 S to CO 2 on the interfacial tension (IFT) and wettability (contact angle, CA) of the CO 2 /water/silica system have been investigated using molecular dynamics simulation methods at 20 MPa and 318 K when the molar concentration of impurity gas was fixed at 20%. For the conditions studied, (1) CH 4 has no significant effect; (2) Ar leads to a higher IFT, a larger CA on silica surfaces with a high hydroxyl density, and a smaller CA on silica surfaces with a low hydroxyl density; and (3) H 2 S causes a decrease of the IFT and an increase of the CA. Capillary pressure and gas storage capacity were predicted using IFT and CA data, and the variation of IFT and CA were explained based on density profiles normal to the gas/water and gas/silica interfaces. These findings might be helpful for better understanding the effects of impurities on CCS.

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Section: Introductionmentioning

confidence: 99%

Effects of Impurities on CO₂ Sequestration in Saline Aquifers: Perspective of Interfacial Tension and Wettability

Chen

Chai

Shen

et al. 2017

Ind. Eng. Chem. Res.

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“…Potential areas for CO 2 storage include depleted oil and gas reservoirs, coal bed seams and deep saline formations. Also, the environmental and geo-mechanical benefits of CO 2 injection and storage have been extended to processes such as enhanced oil recovery (EOR) (Bachu et al, 2004, Godec et al, 2013, Gozalpour et al, 2005 enhanced gas recovery (EGR) (Al-Hashami et al, 2005, Hou et al, 2012 and enhanced coal bed methane production (ECBM) (Pini et al, 2011, Zhang andSong, 2012).…”

Section: Introductionmentioning

confidence: 99%

Carbon dioxide injection and associated hydraulic fracturing of reservoir formations

Eshiet

Sheng

2013

Environ Earth Sci

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The storage potential of subsurface geological systems makes them viable candidates for long term disposal of significant quantities of CO 2 . The geo-mechanical responses of these systems as a result of injection processes as well as the protracted storage of CO 2 are aspects that require sufficient understanding. A hypothetical model has been developed that conceptualises a typical well-reservoir system comprising an injection well where the fluid (CO 2 ) is introduced and a production/abandoned well sited at a distant location. This was accomplished by adopting a numerical methodology (Discrete Element Method), specifically designed to investigate the geo-mechanical phenomena whereby the various processes are monitored at the inter-particle scale. Fracturing events were simulated. In addition, the influence of certain operating variables such as injection flow rate and fluid pressure was studied with particular interest in the nature of occurring fractures and trend of propagation, the pattern and magnitude of pressure build-up at the well vicinity, pressure distribution between well regions and pore velocity distribution between well regions.Modelling results generally show an initiation of fracturing caused by tensile failure of the rock material at the region of fluid injection; however, fracturing caused by shear failure becomes more dominant at the later stage of injection. Furthermore, isolated fracturing events were observed to occur at the production/abandoned wells that were not propagated from the injection point. This highlights the potential of CO 2 introduced through an injection well, which could be used to enhance oil/gas recovery at a distant production well. The rate and magnitude of fracture development is directly influenced by the fluid injection rate. Likewise, the magnitude of pressure build-up is greatly affected by the fluid injection rate and the distance from the point of injection.The DEM modelling technique illustrated provides an effective procedure that allows for more specific investigations of geo-mechanical mechanisms occurring at sub-surface systems. The application of this 2 Corresponding Author:Address: School of Civil Engineering, University of Leeds, UK e-mail: y.sheng@leeds.ac.uk 2 methodology to the injection and storage of CO 2 facilitates the understanding of the fracturing phenomenon as well as the various factors governing the process.

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Geomechanical Modelling Application to Support Reservoir Selection for Carbon Dioxide Utilization and Storage

Korelskiy¹,

Petrakov²,

Sobolev³

et al. 2021

Day 2 Wed, October 13, 2021

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During recent years reduction of carbon dioxide emission driving development of different technologies for CO2 capturing and utilization. Carbon dioxide injection in underground reservoirs is on of effective methods for storage or utilization as enhanced oil recovery agent. Selection of the potential reservoir for CO2 injection is critically important for long term gas storage. In this paper demonstrated software solutions and workflows for modelling of geomechanical modelling of CO2 injection. Injection of CO2 into the reservoir entails a change in reservoir pressure and a change in reservoir temperature. In turn, the stress-strain state of the massif changes, which can lead to the destruction of the reservoir rock and host rocks, reactivation of faults, and, as a consequence, the loss of the integrity of the seal and uncontrolled interstratal crossflows. This paper will describe an example of choosing a reservoir for CO2 injection based on the study of the stress-strain state of the rock mass and its changes due to gas injection. Currently, there are various approaches to CO2 recovery into the reservoir, including injection into depleted gas reservoirs, aquifers and oil reservoirs for the purpose of enhanced oil recovery. For injection planning, it is extremely important to understand both the initial injection conditions and their changes over time. In the work on the published materials, the world experience of CO2 injection into the reservoir with the aim of its utilization was studied. Using the tools of combined geomechanical modeling of the reservoir, the modeling of the change in the stress-strain state of the massif during the injection process was carried out and the conditions under which the destruction of the reservoir cap and the reactivation of faults occur. The influence of uncertainty in elastic-strength parameters on the critical state of the rock mass and the potential of the permissible injection volume is shown. Comparison of injection potential into reservoirs with terrigenous and carbonate seals has been performed.

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Geological Storage of CO<sub>2</sub> to Enhance Coalbed Methane Production

Cited by 3 publications

References 6 publications

Effects of Impurities on CO₂ Sequestration in Saline Aquifers: Perspective of Interfacial Tension and Wettability

Effects of Impurities on CO₂ Sequestration in Saline Aquifers: Perspective of Interfacial Tension and Wettability

Carbon dioxide injection and associated hydraulic fracturing of reservoir formations

Geomechanical Modelling Application to Support Reservoir Selection for Carbon Dioxide Utilization and Storage

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Geological Storage of CO<sub>2</sub> to Enhance Coalbed Methane Production

Cited by 3 publications

References 6 publications

Effects of Impurities on CO2 Sequestration in Saline Aquifers: Perspective of Interfacial Tension and Wettability

Effects of Impurities on CO2 Sequestration in Saline Aquifers: Perspective of Interfacial Tension and Wettability

Carbon dioxide injection and associated hydraulic fracturing of reservoir formations

Geomechanical Modelling Application to Support Reservoir Selection for Carbon Dioxide Utilization and Storage

Contact Info

Product

Resources

About

Effects of Impurities on CO₂ Sequestration in Saline Aquifers: Perspective of Interfacial Tension and Wettability

Effects of Impurities on CO₂ Sequestration in Saline Aquifers: Perspective of Interfacial Tension and Wettability