Method of in situ gasification, cooling and liquefaction of a su

Details Method of in situ gasification, cooling and liquefaction of a su Method of in situ gasification, cooling and liquefaction of a su

1975-03-14

1976-04-06

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166302, 166303, E21B 4324

Patent

active

039483207

ABSTRACT:
A method of liquefying a coal formation in situ wherein the coal formation has been preheated as by a coal gasification project, includes the steps of establishing injection and removal passages connecting the coal formation to the surface, injecting water having a temperature below the formation temperature into the formation to gradually lower the temperature of the formation while forming synthesis gas, injecting a solvent material, having the capability of dissolving the coal, into the formation after it has been reduced to the desired temperature, injecting synthesis gas into the formation to hydrogenate the coal, allowing the formation to subside as the coal is dissolved therein so that more surface area of coal is exposed to the solvent, and removing the admixture of coal and solvent material from the formation as a synthetic crude oil.

REFERENCES:
patent: 1532826 (1925-04-01), Lessing
patent: 2595979 (1952-05-01), Pevere et al.
patent: 2919909 (1960-01-01), Rule
patent: 3770398 (1973-11-01), Abraham et al.

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