scholarly journals Natural Gas, Marginal Coal Bed Methane, Extraction

2012 ◽  
Author(s):  
Timothy J Skone
Keyword(s):  
Natural Gas ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Methane Extraction

A Comparative Analysis between Coal-Bed Methane and Shale Gas in China Based on Cases

2015 ◽  
Vol 737 ◽  
pp. 794-799
Author(s):  
Liang Yu Xia ◽  
Jing Yi Wen
Keyword(s):  
Comparative Analysis ◽  
Natural Gas ◽  
Shale Gas ◽  
Net Present Value ◽  
Cost Benefit Analysis ◽  
Supply And Demand ◽  
Cost Benefit ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Single Well

Owing to the growing gap of natural gas between supply and demand in China, the unconventional natural gas, including coal-bed methane (CBM) and shale gas, has been considered as strategic energy sources. An assessment by China’s Ministry of Land and Resources (MLR) announced that China has potentially resources of 36.7 trillion cubic meters of CBM and 25 trillion cubic meters of shale gas, larger than those of the U.S. Controversial views about their commercial prospects and priorities in order are available. This research aims at exploring which is more economically viable and worth the priority. A cost-benefit analysis (CBA) based on average single well data is employed to carry out a comparative analysis between two typical fields, the coal-bed methane (CBM) fields in the Qinshui basin and the shale gas fields in Sichuan basin. The net present value (NPV), the internal rate of return (IRR) and the payback period are used as indicators in this analysis. The results indicate that CBM is superior to shale gas in viability under the current technological and economic conditions, and the future of the CBM industry is clearer than that of the shale gas industry, but the latter is still promising if the drilling costs can be reduced significantly with technical progress. We suggest that the CBM industry should be given the priority to, and the policy for shale gas should focus on promoting technical innovations.

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.

PESA year in review 2019 – development and production

2020 ◽  
Vol 60 (2) ◽  
pp. 371
Author(s):  
Matthew Quinn
Keyword(s):  
Natural Gas ◽  
Coal Seam ◽  
Liquefied Natural Gas ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
North West ◽  
The North ◽  
Carnarvon Basin

Australia’s production has been steadily increasing since 2013 with the main contributors being the large liquefied natural gas (LNG) projects. The North Carnarvon Basin accounted for over half of Australian production in 2019, dominated by North West Shelf LNG, Gorgon, Wheatstone and Pluto. Just under a quarter of production was from the Bowen-Surat Basin, with the highest producing project being the Condabri, Talinga and Orana cluster of coal seam assets. The next most prolific basin was the Browse Basin at just over 10%, with Prelude and Ichthys, followed by the Gippsland at 7%. During the year, the Greater Enfield Project, in the North Carnarvon Basin, was brought onstream, which involved a 30-km tie-in of the Laverda and Cimatti fields to the Ngujima-Yin floating production, storage and offloading vessel at the Vincent Field via sub-sea pipelines. Also brought into production during 2019 was the Roma North and Project Atlas, Bowen-Surat Basin, coal bed methane projects. Gas from Roma North is exclusively contracted to the Gladstone LNG consortium while Project Atlas gas will be supplied to domestic customers.

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