Method for maximizing shale oil recovery from an underground for

Details Method for maximizing shale oil recovery from an underground for Method for maximizing shale oil recovery from an underground for

1977-09-30

1980-08-26

Pate, III, William F.

Mining or in situ disintegration of hard material

Tunnel recovery of fluid material

299 11, 299 19, E21C 4110, E21C 4300

Patent

active

042192374

ABSTRACT:
A method for maximizing shale oil recovery from an underground oil shale formation which has previously been processed by in situ retorting such that there is provided in the formation a column of substantially intact oil shale intervening between adjacent spent retorts, which method includes the steps of back filling the spent retorts with an aqueous slurry of spent shale. The slurry is permitted to harden into a cement-like substance which stabilizes the spent retorts. Shale oil is then recovered from the intervening column of intact oil shale by retorting the column in situ, the stabilized spent retorts providing support for the newly developed retorts.

REFERENCES:
patent: 1004419 (1911-09-01), Griffith
patent: 3459003 (1969-08-01), O'Neal
patent: 3527500 (1970-09-01), Thompson
patent: 3588175 (1971-06-01), Whiting
patent: 4017119 (1977-04-01), Lewis
patent: 4120355 (1978-10-01), Knepper

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