Generating the dynamic Characteristics and Predicting Techniques for Coal Bed Methane (CBM) Production using Field Performance Data

2018 ◽  
Author(s):  
R. Sitaresmi
Keyword(s):  
Dynamic Characteristics ◽  
Field Performance ◽  
Performance Data ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Cbm Production

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

scholarly journals Analysis on Production of Coal Bed Methane Considering the Change in Permeability of Coal Rock

2016 ◽  
Vol 9 (1) ◽  
pp. 289-298 ◽  
Author(s):  
Zhu Likai ◽  
Ji Youjun ◽  
Yang Tianhong ◽  
Li Xiaoyu
Keyword(s):  
Coal Mine ◽  
Confining Pressure ◽  
Gas Production ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Methane Extraction ◽  
Coal Rock ◽  
Cbm Production ◽  
Stable Yield ◽  
Set Up

Based on the mechanism of migration of the coal bed methane (CBM), and taking into account the deformation of the coal rock during the process of CBM production was also taken into account, a coupled mathematical model considering the interaction of solid and fluid for methane extraction was built. The coal gas extraction of JINcheng coal mine was taken as an example, some typical coal sample was chosen to test the permeability under different confining pressure. The curve for permeability of coal rock versus effective stress under different confining pressure was obtained, a numerical model considering the variation of permeability for methane extraction was set up. The influence of deformation of coal rock on the gas production was simulated and analyzed. The simulation results indicate that the productivity curve considering deformation of rock is closer to the actual production data, at the initial stage of production, the gas rate is less than the case without considering deformation of rock, but the time of stable yield will last longer, and this matches the actual methane extraction, therefore, we recommend that the deformation of coal seam should be considered during the prediction of methane production for JINcheng coal mine.

BIO-ENHANCEMENT OF COAL BED METHANE RESOURCES IN THE SOUTHERN SYDNEY BASIN

2003 ◽  
Vol 43 (1) ◽  
pp. 595 ◽  
Author(s):  
M. Faiz ◽  
L. Stalker ◽  
N. Sherwood ◽  
A. Saghafi ◽  
M. Wold ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Late Cretaceous ◽  
Geological Structure ◽  
Gas Content ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Gas Generation ◽  
Biogenic Methane ◽  
High Production ◽  
Cbm Production

Coals in the Sydney Basin contain large amounts of gas ranging in composition from pure methane (CH4) to pure carbon dioxide (CO2). These gases are derived from thermogenic, magmatic and biogenic sources and their present-day distribution is mainly related to geological structure, depth and proximity to igneous intrusions.A coal bed methane (CBM) study of the Camden area of the Sydney Basin has been jointly conducted by Sydney Gas Company NL (SGC) and the Commonwealth Scientific and Industrial Research Organisation (CSIRO). The delineation of high production fairways is vital for any CBM project development to be commercially successful. An integrated research project employing various methods of reservoir characterisation, including geological, geochemical, geomechanical and gas storage analyses contribute to this delineation for the Camden area, where SGC is currently developing the 300-well Camden Gas Project.In particular, accurate determinations of gas content, saturation levels, composition and origin, as well as interpretations about distribution, are essential for identifying sweet spots for CBM production optimisation. The extent of gas saturation is a function of numerous factors, including amounts of gas generated between the Permian and Late Cretaceous, amounts expelled from the system during Late Cretaceous-Tertiary uplift and amounts of subsequent secondary biogenic methane generated and absorbed in the coals. The extent of this secondary biogenic gas generation appears to be greatest in coals proximal to the basin margins, where meteoric waters carrying bacteria and nutrients had ready access. Significant enhancement of methane content also occurs, however, in deeper parts of the basin where permeable structures exist.The integrated study shows that high production CBM wells drilled to date by SGC are located in zones of enhanced permeability. In these locations original thermogenic wet gases have been removed and additional secondary biogenic methane has been generated due to microbial alteration of coal, hydrocarbons and carbon dioxide. This process has replenished the coals by enhancing the methane contents of the respective seams and this phenomenon can be termed ‘bio-enhancement’ in the context of CBM production.

Method for estimating the wells interference using field performance data

2018 ◽  
pp. 64-69 ◽  
Author(s):  
E.V. Yudin ◽  
◽  
A.E. Gubanova ◽  
V.A. Krasnov ◽  
◽  
...  
Keyword(s):  
Field Performance ◽  
Performance Data
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