Withdrawal of gases and liquids from an in situ oil shale retort

Details Withdrawal of gases and liquids from an in situ oil shale retort Withdrawal of gases and liquids from an in situ oil shale retort

1980-06-02

1982-11-02

Purser, Ernest R.

Mining or in situ disintegration of hard material

Tunnel recovery of fluid material

299 13, E21C 4110, E21B 4324

Patent

active

043570518

ABSTRACT:
An in situ oil shale retort is formed within a subterranean formation containing oil shale. The retort contains a fragmented permeable mass of formation particles containing oil shale. A production level drift extends below the fragmented mass, leaving a lower sill pillar of unfragmented formation between the production level drift and the fragmented mass. During retorting operations, liquid and gaseous products are recovered from a lower portion of the fragmented mass. A liquid outlet line extends from a lower portion of the fragmented mass through the lower sill pillar for conducting liquid products to a sump in the production level drift. Gaseous products are withdrawn from the fragmented mass through a plurality of gas outlet lines distributed across a horizontal cross-section of a lower portion of the fragmented mass. The gas outlet lines extend from the fragmented mass through the lower sill pillar and into the production level drift. The gas outlet lines are connected to a gas withdrawal manifold in the production level drift, and gaseous products are withdrawn from the manifold separately from withdrawal of liquid products from the sump in the production level drift.

REFERENCES:
patent: 1919636 (1933-07-01), Karrick
patent: 2481051 (1949-09-01), Uren
patent: 3001776 (1961-09-01), Van Poollen
patent: 4043595 (1977-08-01), French
patent: 4143917 (1979-03-01), Sweany
patent: 4192553 (1980-03-01), Studebaker et al.
patent: 4263969 (1981-04-01), Ginsburgh
patent: 4269449 (1981-05-01), del Rio

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