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Raton basin assessment of coalbed methane resources. [USA - Colorado and New Mexico]

Journal Article:

Abstract

Coalbed methane resources of the Raton basin were assessed through an analysis of public and proprietary sources encompassing stratigraphic, structural, hydrologic, coal rank, and gas-content data. Mapping of coal seams within the Vermejo Formation and Raton Formation revealed several net-coal thickness maxima of 80 ft along the synclinal axis of the basin. However, this sizable coal resource is distributed among multiple, thin, laterally discontinuous coal seams; approximately 60 percent of the total coal in the Raton Formation and 50 percent in the Vermejo Formation occur in seams thinner than 4 ft. Coal rank of the basal Vermejo Formation ranges from high-volatile C to low-volatile bituminous, indicating adequate thermal maturity for methane-generation. Coal seam gas contents show considerable scatter, ranging from 4 to 810 CF/T (ash free), and vary more closely with depth below the hydrologic potentiometric surface than with depth below ground level. Exclusive of shallow and intruded coal seams, in-place coalbed methane resources are estimated at 8.4 to 12.1 TCF, with a mean average of 10.2 TCF. The apparent highest concentration of coalbed methane (24 BCF/mi[sup 2]) occurs along the La Veta trough in Colorado in an area that is geologically less well studied. A second maximum of 8  More>>
Authors:
Stevens, S H; Kelso, B S; Lombardi, T E; Coates, J -M [1] 
  1. Advanced Research International, Arlington, VA (USA)
Publication Date:
Feb 01, 1993
Product Type:
Journal Article
Reference Number:
CLA-93-080977; EDB-93-101929
Resource Relation:
Journal Name: Quarterly Review of Methane from Coal Seams Technology; (United States); Journal Volume: 10:3
Subject:
01 COAL, LIGNITE, AND PEAT; 03 NATURAL GAS; COAL DEPOSITS; METHANE; RESOURCE ASSESSMENT; USA; COAL RANK; COAL RESERVES; COAL SEAMS; COLORADO; DEPTH; GASES; GEOLOGIC STRUCTURES; GEOMETRY; HYDROLOGY; MAPPING; NEW MEXICO; OVERBURDEN; SEDIMENTARY BASINS; STRATIGRAPHY; THICKNESS; ALKANES; DEVELOPED COUNTRIES; DIMENSIONS; FLUIDS; GEOLOGIC DEPOSITS; GEOLOGY; HYDROCARBONS; MATHEMATICS; MINERAL RESOURCES; NORTH AMERICA; ORGANIC COMPOUNDS; RESERVES; RESOURCES; 011000* - Coal, Lignite, & Peat- Reserves, Geology, & Exploration; 030200 - Natural Gas- Reserves, Geology, & Exploration
OSTI ID:
6300552
Country of Origin:
United States
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 8756-9655; CODEN: QRMTEA
Submitting Site:
CLA
Size:
Pages: 7-13
Announcement Date:

Journal Article:

Citation Formats

Stevens, S H, Kelso, B S, Lombardi, T E, and Coates, J -M. Raton basin assessment of coalbed methane resources. [USA - Colorado and New Mexico]. United States: N. p., 1993. Web.
Stevens, S H, Kelso, B S, Lombardi, T E, & Coates, J -M. Raton basin assessment of coalbed methane resources. [USA - Colorado and New Mexico]. United States.
Stevens, S H, Kelso, B S, Lombardi, T E, and Coates, J -M. 1993. "Raton basin assessment of coalbed methane resources. [USA - Colorado and New Mexico]." United States.
@misc{etde_6300552,
title = {Raton basin assessment of coalbed methane resources. [USA - Colorado and New Mexico]}
author = {Stevens, S H, Kelso, B S, Lombardi, T E, and Coates, J -M}
abstractNote = {Coalbed methane resources of the Raton basin were assessed through an analysis of public and proprietary sources encompassing stratigraphic, structural, hydrologic, coal rank, and gas-content data. Mapping of coal seams within the Vermejo Formation and Raton Formation revealed several net-coal thickness maxima of 80 ft along the synclinal axis of the basin. However, this sizable coal resource is distributed among multiple, thin, laterally discontinuous coal seams; approximately 60 percent of the total coal in the Raton Formation and 50 percent in the Vermejo Formation occur in seams thinner than 4 ft. Coal rank of the basal Vermejo Formation ranges from high-volatile C to low-volatile bituminous, indicating adequate thermal maturity for methane-generation. Coal seam gas contents show considerable scatter, ranging from 4 to 810 CF/T (ash free), and vary more closely with depth below the hydrologic potentiometric surface than with depth below ground level. Exclusive of shallow and intruded coal seams, in-place coalbed methane resources are estimated at 8.4 to 12.1 TCF, with a mean average of 10.2 TCF. The apparent highest concentration of coalbed methane (24 BCF/mi[sup 2]) occurs along the La Veta trough in Colorado in an area that is geologically less well studied. A second maximum of 8 BCF/mi[sup 2] occurs southeast of Vermejo Park in New Mexico. Successful coalbed methane development in the Raton basin will require favourable coal seam geometry, depth, and reservoir properties in addition to sufficient in-place resources. Local fracturing and enhanced permeability may occur along folds, such as the Vermejo anticline, that splay off the Sangre de Cristo thrust belt. 16 refs., 9 figs.}
journal = {Quarterly Review of Methane from Coal Seams Technology; (United States)}
volume = {10:3}
journal type = {AC}
place = {United States}
year = {1993}
month = {Feb}
}