Core flooding experiments of CO2 enhanced coalbed methane recovery

Sander, Regina; Connell, Luke D.; Pan, Zhejun; Camilleri, Michael; Heryanto, Deasy; Lupton, Nicholas

doi:10.1016/j.coal.2014.06.007

Cited by 50 publications

(23 citation statements)

References 28 publications

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“…Again, it can be shown that the swelling deformation rises by 3.8, 3.6, 6.2, 2.6, 1.4, and 1.4%, when the pressure rises from 7 to 8 MPa, for a moisture concentration at 0.00, 0.38, 0.75, 1.42, 2.66, and 3.13%. Figure 4 shows the experimental results of Sander et al (2014). The responses of the modified model (Fig.…”

Section: Influence Of Moisture Content On Coal Deformationmentioning

confidence: 99%

The influence of moisture content on coal deformation and coal permeability during coalbed methane (CBM) production in wet reservoirs

Talapatra

Karim

2020

J Petrol Explor Prod Technol

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Moisture adsorption in the coal seams affects the gas adsorption capacity and can alter the coal deformation and permeability criteria of the coal seam. The effect of dynamic loss of moisture content, both on moisture and gas sorption-induced coal swelling/shrinkage strains, during the coalbed methane (CBM) production, is crucial. This study investigates the interactions among coal matrix, absorbed gas, and moisture content, based on the coal swelling/shrinkage strains and gas adsorption decay criteria. Consequently, a mathematical model of the coal deformation is developed for the proper evaluation of the moisture effect. For developing the model, this paper considers the standard gas flow and moisture loss equations to assess the volumetric content, equilibrium pressure, and density of the moisture. Finally, it comprehensively analyzes the sensitive factors and effects of elemental parameters of moisture content on coal deformation and coal permeability. The results show that moisture content at adsorbed state significantly changes the coal swelling/shrinkage strain and that distorted swelling and shrinkage characteristics can promote the permeability alternation in wet coal reservoirs. Moreover, the intermolecular attraction between the coal structure and the moisture content has a significant effect on methane adsorption/desorptioninduced deformation in coal structure. This study also designs the coal deformation strains as a function of moisture content by the Langmuir type model and evaluates the hysteresis rate between the swelling and shrinkage characteristics. The findings of this paper can characterize a wet coal reserve for CBM production and anticipate future production under different operating conditions.

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Section: Influence Of Moisture Content On Coal Deformationmentioning

confidence: 99%

The influence of moisture content on coal deformation and coal permeability during coalbed methane (CBM) production in wet reservoirs

Talapatra

Karim

2020

J Petrol Explor Prod Technol

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“…16 Their results indicated that the transport rate of CH 4 is dependent on its adsorption on coals. More recently, core ooding experiments of CO 2 -ECBM was performed by Sander et al 17 They reported that the displacement efficiency of CO 2 -ECBM was up to 100% of the initial methane. Ranathunga et al 18 conducted experiments to investigate applicability of CO 2 enhanced coal bed methane recovery to low rank coal.…”

Section: Introductionmentioning

confidence: 99%

Molecular simulation of CO₂/CH₄/H₂O competitive adsorption and diffusion in brown coal

et al. 2019

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“…Since elastic modulus has a proportional relationship with the swelling-induced stress in coal seams, that is why it is considered as a vital factor to predict the permeability in coal seams during the CO 2 injection (Sander et al 2014). Previous studies have analyzed the effect of elastic modulus on the methane production along with the quantity of producible methane in coal seams and predicted that the higher value of permeability results from the lower value of elastic modulus (Figs.…”

Section: The Role Of Elastic Modulusmentioning

confidence: 99%

“…Influence of elastic modulus of coal on permeability prediction(Sander et al 2014)Fig. 12Influence of elastic modulus on the amount of recoverable methane from a coalbed(Viete and Ranjith 2007) …”

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confidence: 99%

A study on the carbon dioxide injection into coal seam aiming at enhancing coal bed methane (ECBM) recovery

Talapatra

2020

J Petrol Explor Prod Technol

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Coal seams, particularly deep unmineable coal reservoirs, are the most important geological desirable formations to store CO 2 for mitigating the emissions of greenhouse gas. An advantage of this process is that a huge quantity of CO 2 can be sequestrated and stored at relatively low pressure, which will reduce the amount of storage cost required for creating additional platform to store it. The study on CO 2 storage in coal seam to enhance coal bed methane (ECBM) recovery has drawn a lot of attention for its worldwide suitability and acceptability and has been conducted since two decades in many coalmines. This article focuses on the coal seam properties related to CO 2 adsorption/desorption, coal swelling/shrinkage, diffusion, porosity and permeability changes, thermodynamic/thermochemical process, flue gas injection, etc. Here, the performance analysis of both CO 2 storage and ECBM recovery process in coal matrixes is investigated based on the numerical simulation. In this study, a one-dimensional mathematical model of defining mass balances is used to interpret the gas flow and the gas sorption and describe a geomechanical relationship for determining the porosity and the permeability alteration at the time of gas injection. Vital insights are inspected by considering the relevant gas flow dynamics during the displacement and the influences of coal swelling and shrinkage on the ECBM operation. In particular, pure CO 2 causes more displacement that is more efficient in terms of total CH 4 recovery, whereas the addition of N 2 to the mixture assists to make quicker way of the initial methane recovery. However, this study will support future research aspirants working on the same topic by providing a clear conception and limitation about this study. Keywords CBM recovery • Carbon dioxide storage • Gas flow dynamics • Gas adsorption • Coal swelling List of symbols t Overall porosity c Cleat porosity p Macroporosity n c Number of components n Adsorbed phase concentration (mol/m 3) c Actual gas phase concentration (mol/m 3) c 1 Effective pressure coefficient (1/Pa) c 2 Swelling coefficient u Superficial velocity of fluid (m/s)

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Core flooding experiments of CO2 enhanced coalbed methane recovery

Cited by 50 publications

References 28 publications

The influence of moisture content on coal deformation and coal permeability during coalbed methane (CBM) production in wet reservoirs

The influence of moisture content on coal deformation and coal permeability during coalbed methane (CBM) production in wet reservoirs

Molecular simulation of CO₂/CH₄/H₂O competitive adsorption and diffusion in brown coal

A study on the carbon dioxide injection into coal seam aiming at enhancing coal bed methane (ECBM) recovery

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Core flooding experiments of CO2 enhanced coalbed methane recovery

Cited by 50 publications

References 28 publications

The influence of moisture content on coal deformation and coal permeability during coalbed methane (CBM) production in wet reservoirs

The influence of moisture content on coal deformation and coal permeability during coalbed methane (CBM) production in wet reservoirs

Molecular simulation of CO2/CH4/H2O competitive adsorption and diffusion in brown coal

A study on the carbon dioxide injection into coal seam aiming at enhancing coal bed methane (ECBM) recovery

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Molecular simulation of CO₂/CH₄/H₂O competitive adsorption and diffusion in brown coal