Method of preparing a wet coal seam for production in situ

Details Method of preparing a wet coal seam for production in situ Method of preparing a wet coal seam for production in situ

1978-01-20

1979-01-23

Novosad, Stephen J.

Wells

Processes

Specific pattern of plural wells

166251, E21B 4324

Patent

active

041355784

ABSTRACT:
A water bearing underground coal seam is prepared for production by in situ techniques by drilling a series of wells into the seam. Paths of maximum permeability are determined by taking oriented cores in selected wells. The coal seam is partially dewatered by removing water from the seam in selected wells. Reaction zones are established in the coal, first along the paths of maximum permeability, then reaction zones are established substantially perpendicular to the original paths of maximum permeability.

REFERENCES:
patent: 2923535 (1960-02-01), Ljungstrom
patent: 2973811 (1961-03-01), Rogers
patent: 3016953 (1962-01-01), Marx
patent: 3115928 (1963-12-01), Campion et al.
patent: 3152638 (1964-10-01), Geffen et al.
patent: 3334687 (1967-08-01), Parker
patent: 3517744 (1970-06-01), Horton
patent: 3997005 (1976-12-01), Komar
patent: 4010800 (1977-03-01), Terry
patent: 4024914 (1977-05-01), Kreinin
patent: 4062404 (1977-12-01), Pasini et al.

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