scholarly journals Enhanced coal bed methane production and sequestration of CO2 in unmineable coal

2005 ◽  
Author(s):  
James Locke ◽  
Richard Winschel
Keyword(s):  
Methane Production ◽  
Coal Bed ◽  
Coal Bed Methane

The Research of Variation Regularity of Coal Bed Methane Production in CO2 Flooding

2013 ◽  
Vol 868 ◽  
pp. 677-681
Author(s):  
Yang Liu ◽  
Di Wu
Keyword(s):  
Methane Production ◽  
Injection Pressure ◽  
Initial Pressure ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Mixed Gas ◽  
Methane Recovery ◽  
Factors Affecting ◽  
Gas Concentration ◽  
Injection Process

CO2flooding can increase coal bed methane production rate, enhance coal bed methane recovery and store CO2into underground. It has good application prospect for CBM development. This paper analyzes the adsorption-desorption law of mixed gas in the coal during the CO2injection process, as well as the diffusion and seepage law of gas in the coal seam. The sensitivity of factors affecting coal bed methane production is studied and then the coal bed methane production under different conditions is simulated numerically. The results show that methane concentration and coals permeability are the two key factors affecting the output of coal bed gas and their influence on productivity are even more significant than injection pressure and initial pressure. The higher injection pressure, coals permeability and gas concentration, the greater amount of methane the coal reservoirs will yield. When the coals permeability and the gas concentration in coal reservoirs increase, the growth rate of methane production accelerates accordingly.

scholarly journals Enhanced coal bed methane (ECBM) recovery: optimization of CBM production using different injected gas composition and rate for south sumatra CBM field, Indonesia

2018 ◽  
Vol 67 ◽  
pp. 03015 ◽  
Author(s):  
Abdul Wahid ◽  
Fariz Adriansyah Putra ◽  
Muhamad Taufiq Hidayat ◽  
Muhammad Yusuf
Keyword(s):  
Methane Production ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Co2 Injection ◽  
Technical Limitation ◽  
Recovery Method ◽  
National Production ◽  
The Difference ◽  
Cbm Production ◽  
Carbon Dioxide Co2

Indonesia, whose 453 TCF potential coal bed methane (CBM) reserves, rank the 6th largest CBM reserves around the world. However, the technical limitation is amongst the major issues slowing down the exploitation progress of the resources which current national CBM production only reach up to 1 MMSCFD. This paper provides a newly enhanced coal bed methane (ECBM) recovery method to improve the methane production. Scenarios of nitrogen (N2) and carbon dioxide (CO2) injection were used in this study to perform 25 years production simulation and compared with CBM primary production. Created hypothetical model based on the characteristic of coal seams CBM field in South Sumatra, Indonesia, was used to analyze the increasing methane production by using N2 and CO2 injection with different compositions and rates. The result observed about 3,52% incremental methane production by injecting N2 into CBM reservoir. In other words, this new method has an impact on enhancing the CBM national production, particularly South Sumatra CBM field, which could be useful for further CBM development in Indonesia. Mixture injection seemed to be unfavorable for the field due to the difference of gas mechanism. Thus

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