Thermal recovery of viscous hydrocarbons using arrays of radiall

Details Thermal recovery of viscous hydrocarbons using arrays of radiall Thermal recovery of viscous hydrocarbons using arrays of radiall

1980-04-11

1981-10-27

Purser, Ernest R.

Mining or in situ disintegration of hard material

Tunnel recovery of fluid material

166 50, 166272, E21C 4110

Patent

active

042969697

ABSTRACT:
Normally immobile mineral values are recovered from a subterranean formation by penetrating the formation with an access shaft and drilling two radial arrays of substantially horizontal wells out into the formation from the shaft, one array of wells being substantially shorter than the other array. A mobilizing fluid is injected into the formation via alternate longer wells so that an outer zone of high fluid mobility is created in the formation. Then the mobilizing fluid is injected into all of the longer wells to sweep the mineral values to the shorter wells where such values are recovered. Improved sweep efficiency of the mineral values is achieved thereby.

REFERENCES:
patent: 4020901 (1977-05-01), Pisio et al.
patent: 4160481 (1979-07-01), Turk et al.

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