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Title: Method for in situ gasification of a subterranean coal bed

Abstract

The method of the present invention relates to providing controlled directional bores in subterranean earth formations, especially coal beds for facilitating in situ gasification operations. Boreholes penetrating the coal beds are interconnected by laser-drilled bores disposed in various arrays at selected angles to the major permeability direction in the coal bed. These laser-drilled bores are enlarged by fracturing prior to the gasification of the coal bed to facilitate the establishing of combustion zones of selected configurations in the coal bed for maximizing the efficiency of the gasification operation.

Inventors:
 [1]
  1. Morgantown, WV
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
OSTI Identifier:
862839
Patent Number(s):
4026356
Assignee:
United States Energy Research and Development Administration (Washington, DC)
Patent Classifications (CPCs):
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; situ; gasification; subterranean; coal; bed; relates; providing; controlled; directional; bores; earth; formations; especially; beds; facilitating; operations; boreholes; penetrating; interconnected; laser-drilled; disposed; various; arrays; selected; angles; major; permeability; direction; enlarged; fracturing; prior; facilitate; establishing; combustion; zones; configurations; maximizing; efficiency; operation; especially coal; gasification operation; situ gasification; coal bed; earth formations; earth formation; combustion zone; subterranean earth; combustion zones; permeability direction; subterranean coal; coal beds; providing controlled; gasification operations; holes penetrating; situ gas; controlled directional; /166/175/

Citation Formats

Shuck, Lowell Z. Method for in situ gasification of a subterranean coal bed. United States: N. p., 1977. Web.
Shuck, Lowell Z. Method for in situ gasification of a subterranean coal bed. United States.
Shuck, Lowell Z. Tue . "Method for in situ gasification of a subterranean coal bed". United States. https://www.osti.gov/servlets/purl/862839.
@article{osti_862839,
title = {Method for in situ gasification of a subterranean coal bed},
author = {Shuck, Lowell Z},
abstractNote = {The method of the present invention relates to providing controlled directional bores in subterranean earth formations, especially coal beds for facilitating in situ gasification operations. Boreholes penetrating the coal beds are interconnected by laser-drilled bores disposed in various arrays at selected angles to the major permeability direction in the coal bed. These laser-drilled bores are enlarged by fracturing prior to the gasification of the coal bed to facilitate the establishing of combustion zones of selected configurations in the coal bed for maximizing the efficiency of the gasification operation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {5}
}

Patent:

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