Fracturing techniques depend on coal seam characteristics
- S.A. Holditch and Associates, Inc., College Station, TX (US)
Over the past few years, while investigating the types of fracture treatments conducted in coal, the authors have categorized five separate stimulation scenarios. These scenarios are described as follows: A shallow coal seam where a horizontal fracture will be created. A series of thin coal seams in a depth range where single, planar vertical fractures will be created. A single thick coal seam where the hydraulic fracture will be confined entirely in the coal and complex fracture system (multivertical or T-shaped fractures) created. An hydraulic fracture where the fracture is initially contained within a single coal seam, but during the latter portion of the treatment the fracture begins to propagate vertically into the bounding layers. A high-permeability (highly cleated-fractured) coal seam that does not require stimulation.
- OSTI ID:
- 6570242
- Journal Information:
- Oil and Gas Journal; (USA), Vol. 88:30; ISSN 0030-1388
- Country of Publication:
- United States
- Language:
- English
Similar Records
A comparative evaluation of vertical and horizontal drainage wells for the degasification of coal seams
Observation of induced fractures intercepted by mining in the Warrior Basin, Alabama. Topical report. Rock Creek methane from multiple coal seams completion project
Related Subjects
01 COAL, LIGNITE, AND PEAT
COAL SEAMS
HYDRAULIC FRACTURING
NATURAL GAS
ENHANCED RECOVERY
DIRECTIONAL DRILLING
NATURAL GAS WELLS
PERMEABILITY
VERTICAL INTEGRATION
WELL STIMULATION
COAL DEPOSITS
COMMINUTION
DRILLING
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FRACTURING
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC DEPOSITS
MINERAL RESOURCES
RECOVERY
RESOURCES
STIMULATION
WELLS
030300* - Natural Gas- Drilling
Production
& Processing
030200 - Natural Gas- Reserves
Geology
& Exploration
011000 - Coal
Lignite
& Peat- Reserves
Geology
& Exploration