Fracturing techniques depend on coal seam characteristics

Journal Article · Mon Jul 23 04:00:00 EDT 1990 · Oil and Gas Journal; (USA)

OSTI ID:6570242

Ely, J W; Holditch, S A ^[1]

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1. 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), Journal Name: Oil and Gas Journal; (USA) Vol. 88:30; ISSN OIGJA; ISSN 0030-1388
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
011000 -- Coal
Lignite
& Peat-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
030300* -- Natural Gas-- Drilling
Production
& Processing
COAL DEPOSITS
COAL SEAMS
COMMINUTION
DIRECTIONAL DRILLING
DRILLING
ENERGY SOURCES
ENHANCED RECOVERY
FLUIDS
FOSSIL FUELS
FRACTURING
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC DEPOSITS
HYDRAULIC FRACTURING
MINERAL RESOURCES
NATURAL GAS
NATURAL GAS WELLS
PERMEABILITY
RECOVERY
RESOURCES
STIMULATION
VERTICAL INTEGRATION
WELL STIMULATION
WELLS