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Index / Coalbed Methane / Exploration
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Index / Coalbed Methane / Exploration

The year-end 2008 PGC potential natural gas resource estimate, which is the volume the Committee believes could be found and produced in future years, is comprised of 1,673 Tcf resident in traditional gas reservoirs and 163 Tcf resident in coalbed reservoirs. Estimated traditionally reservoired resources are 519 Tcf (21.6%) higher than in 2006, whereas estimated coalbed methane resources are 3 Tcf (1.9%) lower. The changes arose primarily from analysis of new data for the Gulf Coast, Rocky Mountain, Atlantic, and Mid-Continent areas, which jointly account for 87% of estimated traditional resou... More →
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Index / Coalbed Methane / Exploration

Listed below is a selection of recently published geoscientific articles on coal seam methane and shale gas. These references have been sourced from the American Geological Institute GeoRef database and other literature sources and are available through the PIRSA Geoscience Library. Blue text indicates that a hyperlink to abstracts (or full articles) is available. To hyperlink, access the Adobe PDF of this journal on the PIRSA Minerals website http://www.minerals.pir.sa.gov.au then go to: Publications, MESA Journals.... More →
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Index / Coalbed Methane / Exploration

China is the largest coal producing country in the world as well as the largest coal consuming country in the world. The national coalbed methane resources are 37 trillion cubic meters, located no deeper than 2,000 meters underground: 40 percent of the resources are in East China gas reservoirs; 18 percent are in Central China; 26 percent are in West China; and 16 percent are in South China. Over 46 percent of China's coal mines are rich in gas and over 1.3 billion cubic meters of gas are being emitted each year without being effectively used.
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Index / Coalbed Methane / Exploration

The Illinois Basin is an elliptical intercratonic basin that covers approximately 34 million acres in Illinois, Southwestern Indiana and Western Kentucky. All coals of economic interest are found in the Pennsylvanian-aged strata in which 75 individual seams have been identified and of which 20 have been actively mined since the 1800s. The coals that have potential for gas production are found in the middle and upper Lower Pennsylvanian rocks of the Carbondale and Spoon formations. These coals vary in thickness from a few inches to over fifteen feet. The coals vary in rank from high volatile A ... More →
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Index / Coalbed Methane / Exploration

Eastern States includes Virginia prior to 2006. Other States includes Oklahoma, Pennsylvania, Utah, Virginia, West Virginia, and Wyoming for data prior to 2000. These states are individually listed or grouped in Eastern States and Western States for 2000 and later. See Definitions, Sources, and Notes link above for more information on this table.
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Index / Coalbed Methane / Exploration

The Central Louisiana Coalbed Methane Basin (CELCOM) is part of a much larger coalbed methane basin, the Tertiary Coalbed Methane Basin, which covers parts of seven states. It is given its own name primarily for the purpose of reference in communication. In the entirety of the Tertiary Coalbed Methane Basin, there appears to be only one coalbed methane gas-producing well. This well was completed in the CELCOM in 1989. Within the United States, there are 16 known coalbed methane basins that contain approximately 8,000 methane gas-producing wells. To date, coalbed methane production accounts for... More →
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Index / Coalbed Methane / Exploration

The development of Arkansas's coalbed natural gas resources began in 2001 and has yielded an approximate cumulative production of 10 Bcf. Estimated 2007 annual production of CBM is approximately 3 Bcf. CDX Gas LLC, a Texas based energy company, is currently the only producer of this resource and has drilled approximately 37 Z-pinnate horizontal wells and 15 vertical wells in Sebastian County, Arkansas. The wells are completed in the Pennsylvanian Lower Hartshorne coal and approximately 564,238 feet of horizontal pinnate lateral has been drilled in Arkansas. On average, approximately 15,000 fee... More →
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Index / Coalbed Methane / Exploration

By evaluating and prioritizing coalbed methane provinces and basins for the purpose of drilling and testing their potential as an alternative energy source (electrical power generation and home heating), remote Alaska's coalbed methane potential has been realized. On the basis of geologic and hydrologic criteria, the Northern Alaska Province (Colville Basin), Upper Yukon Province (Yukon Basin), and Alaska Peninsula Province (Chignik Basin) are considered of primary economic importance to making a contribution to the rural Alaskan gas supply. Detailed basin analysis of the North Slope has defin... More →
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Index / Coalbed Methane / Exploration

High coalbed methane producibility commonly occurs in areas of upward-flow potential associated with permeability barriers (no-flow boundaries). Outcrop studies combined with examination of existing geologic maps and precipitation patterns therefore provide valuable information on coal resources (coal thickness and orientation), ground-water flow and permeability barriers (cleat orientation, faulting, coal pinchout), and gas generation potential (surface coal rank and coal quality). These data are then combined to delineate areas of potentially higher gas content and, therefore, higher coalbed... More →
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Index / Coalbed Methane / Exploration

Coalbed methane (CBM) production has become well established in many basins of both the eastern and western United States. Exploration and production of CBM in the Tertiary Gulf Coast Basin has lagged behind these other basins, although the presence of lignitic coals in the Paleocene/Eocene Wilcox Formation has long been known. Some possible reasons for this lack of interest may be the perceptions that the Wilcox coals are immature (lignite) and that the extent and thicknesses of these coals is poorly known.... More →
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Index / Coalbed Methane / Exploration

This MSc study of the coal-bearing Karoo strata in the Central Kalahari Sub-basin attempts to work out the dynamics of coal depositional environments, in particular the forces responsible for changes in the accommodation space (e.g., subsidence vs. sedimentation rates). This is hoped to be achieved by a detailed review of the temporal and spatial stratigraphic variation of the coalbearing successions, including the analysis of facies changes based on over 800, widely distributed borehole records (e.g., core descriptions, gamma and spontaneous potential logs), field observations and palaeocurre... More →
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Index / Coalbed Methane / Exploration

Coalbed methane is natural gas that occurs in coal beds. The geological process that turns plant material into coal generates methane gas. This gas was a deadly nuisance that produced explosions in underground coal mines, so the mines had to be ventilated to remove the gas. In the early 1980's, the mining industry began to capture and sell this gas rather than release it to the atmosphere. Thus, a new industry was createdthe commercial production of methane from subsurface coal beds. In Kansas, most of the activity has been in the southeastern part of the state, primarily Montgomery, Wilson, w... More →
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Index / Coalbed Methane / Exploration

Coal is an organic-rich rock derived from plant material deposited in a swamp, marsh, or bog. Coal varies by grade (percentage of mineral impurities), type (organic composition), and rank (level of coalification). Rank describes the transformation from peat (unconsolidated plant remains) through lignite, subbituminous, bituminous, semianthracite, and anthracite coal (rock) from increasing burial pressure, temperature, and time. The coalfield in eastern Oklahoma is divided into the northeast Oklahoma shelf and the Arkoma Basin based on physiographic and structural differences. The commercial co... More →
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Index / Coalbed Methane / Exploration

Montana's vast coal reserves account for about 25% of the nation's total of about 120 billion tons, much of which have large potential reserves of methane.
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Index / Coalbed Methane / Exploration

The depth and maturity of the coal deposits and distance to infrastructure and markets have prevented economic exploitation of all except the Leigh Creek Coalfield. Over the last 20 years, coal research in the state has focused on proving up known deposits for mining and power generation, and only limited greenfield coal exploration has taken place. CSM is now an important source of gas in eastern Australia and is being produced primarily from the Bowen and Surat basins in Queensland and New South Wales. CSM exploration is under way in South Australia, Tasmania, Victoria and Western Australia.... More →
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