COAL SEAM RESERVOIR SIMULATION

1994 ◽  
Vol 34 (1) ◽  
pp. 114
Author(s):  
M.D. Stevenson ◽  
W.V. Pinczewski ◽  
K. Meaney ◽  
L. Paterson
Keyword(s):  
Reservoir Simulation ◽  
Coalbed Methane ◽  
History Matching ◽  
Vertical Wells ◽  
Coal Seams ◽  
Methane Recovery ◽  
Nitrogen Injection ◽  
Enhanced Coalbed Methane Recovery ◽  
The Usa ◽  
Reservoir Simulator

Numerical reservoir simulation in coal seams is different from conventional reservoir simulation because of the capacity for coal to adsorb large amounts of gas, including methane, carbon dioxide and nitrogen, and the need to model coal as a dual porosity system. These factors require specialised numerical simulators written to address these particular issues. This paper describes the development and applications of a reservoir simulator, SIMED II, to a number of applications in the coalbed methane context. SIMED II is an implicit finite-difference code developed to describe simultaneous gas and water flow in coal when there is more than one gas component present. Applications presented in this paper include (1) history matching and forecasting in vertical wells, (2) evaluation of dewatering during the cavity completion method of stimulating coal seams, (3) economic evaluation of nitrogen injection for enhanced coalbed methane recovery, and (4) application to the design and development of gassy coal mines involving gas drainage from horizontal wells. These applications have been directed at locations in the Sydney and Bowen basins in Australia, and the San Juan basin in the USA.

scholarly journals Research on the Processes of Injecting CO2 into Coal Seams with CH4 Recovery Using Horizontal Wells

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 416 ◽  
Author(s):  
Jarosław Chećko ◽  
Tomasz Urych ◽  
Małgorzata Magdziarczyk ◽  
Adam Smolinski
Keyword(s):  
Carbon Dioxide ◽  
Coalbed Methane ◽  
Recovery Process ◽  
Coal Bed ◽  
Structural Parameter ◽  
Storage Site ◽  
Coal Seams ◽  
Methane Recovery ◽  
Enhanced Coalbed Methane Recovery ◽  
Research Activities

The paper presents a research study on modeling and computer simulation of injecting CO2 into the coal seams of the Upper Silesian Coal Basin, Poland connected with enhanced coal bed methane (ECBM) recovery. In the initial stage of the research activities, a structural parameter model was developed specifically with reference to the coal-bearing formations of the Upper Carboniferous for which basic parameters of coal quality and the distribution of methane content were estimated. In addition, a lithological model of the overall reservoir structure was developed and the reservoir parameters of the storage site were analyzed. In the next stage of the research, the static model was supplemented with detailed reservoir parameters as well as the thermodynamic properties of fluids and complex gases. The paper discusses a series of simulations of an enhanced coalbed methane recovery process with a simultaneous injection of carbon dioxide. The analyses were performed using the ECLIPSE software designed for simulating coal seam processes. The results of the simulations demonstrated that the total volume of CO2 injected to a designated seam in a coal mine during the period of one year equaled 1,954,213 sm3. The total amount of water obtained from the production wells during the whole period of the simulations (6.5 years) was 9867 sm3. At the same time, 15,558,906 sm3 of gas was recovered, out of which 14,445,424 sm3 was methane. The remaining 7% of the extracted gas was carbon dioxide as a result of reverse production of the previously injected CO2. However, taking into consideration the phenomena of coal matrix shrinking and swelling, the total amount of injected CO2 decreased to approximately 625,000 sm3.

Gas Transportation and Enhanced Coalbed Methane Recovery Processes in Deep Coal Seams: A Review

2016 ◽  
Vol 30 (11) ◽  
pp. 8832-8849 ◽  
Author(s):  
X. G. Zhang ◽  
P. G. Ranjith ◽  
M. S. A. Perera ◽  
A. S. Ranathunga ◽  
A. Haque
Keyword(s):  
Coalbed Methane ◽  
Coal Seams ◽  
Methane Recovery ◽  
Recovery Processes ◽  
Enhanced Coalbed Methane Recovery ◽  
Enhanced Coalbed Methane

Predicted Enhanced Coalbed Methane Recovery and CO2 Sequestration in West Henan Province

2014 ◽  
Vol 962-965 ◽  
pp. 168-171 ◽  
Author(s):  
Run Chen
Keyword(s):  
Primary Production ◽  
Coalbed Methane ◽  
Greenhouse Gas Emission ◽  
Henan Province ◽  
Coal Seams ◽  
Methane Recovery ◽  
Factors Affecting ◽  
Enhanced Coalbed Methane Recovery ◽  
Recovery Potential ◽  
Sequestration Potential

CO2injection into coal seams can not only enhance coalbed methane recovery (ECBM), but also reduce greenhouse gas emission into atmosphere. This paper describes some factors affecting CBM primary production, ECBM recovery and CO2sequestration in coal seams; and calculates CBM recovery quantity with primary production, the ECBM recovery potential quantity and CO2sequestration capacity in coal seams of West Henan Province. The results show that CBM primary and ECBM recovery potential quantity are estimated to be over 2147.278 and 1656.217 Gm3. The prediction also indicates that CO2sequestration potential quantity is about 3233.79 Gm3.

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