Viscous oil recovery using controlled pressure well pair drainag

Details Viscous oil recovery using controlled pressure well pair drainag Viscous oil recovery using controlled pressure well pair drainag

1983-12-12

1985-02-19

Novosad, Stephen J.

Wells

Processes

Electric current or electrical wave energy through earth for...

166268, E21B 4324

Patent

active

044999488

ABSTRACT:
A relatively closely spaced injection well and production well pair is used as a single electrode and is used in a way that significantly increases the effective radius of an electrode production location. This is achieved by appropriately spacing of the wells and flowing aqueous fluid between wells at a pressure below the pressure driving oil toward the production well. The controlled pressure flowing aqueous fluid forms a highly conductivity flow path for oil flowing toward the production well. The effectiveness of the increased well pair drainage radius is achieved or augmented by injecting aqueous fluid, preferably steam or hot water, into the formation at a pressure great enough to drive oil toward the well pair and using the formation injection well as an electrode for electrically heating the oil. More than one well pair may be used either as a separate or the same electrode. One injection well or one production well may be used to form two or more well pairs. Several well pairs may be used in a suitable producing and injection pattern.

REFERENCES:
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patent: 3272261 (1966-09-01), Morse
patent: 3848671 (1974-11-01), Kern
patent: 3931856 (1976-01-01), Barnes
patent: 3948319 (1976-04-01), Pritchett
patent: 4010799 (1977-03-01), Kern et al.
patent: 4084637 (1978-04-01), Todd
patent: 4320801 (1982-03-01), Rowland et al.

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