Coalbed methane - Wikipedia
Coalbed methane (CBM or coal-bed methane), [1] coalbed gas, or coal seam gas (CSG [1]) is a form of natural gas extracted from coal beds. [2] In recent decades it has become an important source of energy in United States, Canada, Australia, and other countries.
What is coal seam gas? – GISERA
Coal seam gas (CSG), also known as coal bed methane, is a mixture of a number of gases but is mostly made up of methane (generally 95-97 per cent pure methane). It is typically attached by adsorption to the coal matrix, and is held in the coal by the pressure of formation water in the coal cleats and fractures.
Coal seam gas | Environment | Department of Environment, …
2024年7月22日 · Coal seam gas (CSG) is a type of unconventional gas. It is a natural gas, consisting primarily of methane, which is found in coal deposits. Coal seam gas collects in the coal seams by bonding to the surface of coal particles.
Gas content, geochemical characteristics and implications of …
3 天之前 · Gas content of coal seams was estimated by following the China National Standard GB/T 23,249 − 2009. Based on practical experience in geological exploration, a series of steps have been adopted ...
Coal Seam - an overview | ScienceDirect Topics
Coal seam gas, also known as coal bed methane, is a natural, colorless, odorless mixture of various gases (primarily methane) that is extracted from coal at a depth of ∼200–1000 m. The chemical composition of CSG and conventional gas is the same.
International Journal of Coal Geology - ScienceDirect
2023年11月1日 · Despite the presence of significant free gas in deep CBM reservoirs, production remains challenging due to the extremely low permeability of coal seams. Additionally, high in-situ stress and complex mechanical parameters of deep coal seams can significantly reduce hydraulic fracturing performance, further complicating the development of deep CBM.
Coalbed methane: A review - ScienceDirect
2012年11月1日 · Coalbed methane (CBM) is also known as coal seam gas (CSG), coal seam methane (CSM), and coal seam natural gas (CSNG)—all of which are identical for the purposes of this paper. It is recognised, however, that any gas coming from coal is not just pure methane.
Coal Seam Gas—Extraction, Use and Emissions - MDPI
2022年7月31日 · Coal seam gas is primarily made up of methane gas, generally 95–98%. This gas is also called coal bed methane (CBM) if extracted from a coal deposit as unconventional natural gas for economic purposes.
Investigation into the variation characteristics and influencing ...
2024年8月13日 · Coalbed methane (CBM), also known as coal seam gas, is a significant mineral resource that coexists with coal. During its formation, when coal is shallowly buried, bacterial...
Reduced-Order Model of Coal Seam Gas Extraction Pressure
3 天之前 · A full-order numerical model for coal mine gas extraction was computed based on the cross-combination of different parameters, yielding results for the distribution of coal seam gas pressure, gas extraction flow rate x 4, and gas extraction concentration x 5. A total of 480 experimental samples were generated.