Wells – Processes – Specific pattern of plural wells
Patent
1984-06-11
1986-11-04
Suchfield, George A.
Wells
Processes
Specific pattern of plural wells
166248, 166263, 166272, E21B 4324, E21B 4330
Patent
active
046205926
ABSTRACT:
A subterranean viscous oil bearing formation is progressively produced in a preselected direction by a combination of steps conducted in sets of wells spaced from each other in the preselected direction. A first set of wells is used to both apply electrical heat to the formation and inject brine, preferably at low rates. Then electrical heating and brine injection are applied to a second set of wells spaced in the preselected direction from the first set of wells. Electrical heating in the first of wells is ceased and hot aqueous fluid injection is commenced. These steps are moved in sequence to coact with each other and traverse and produce the formation thereby providing a more energy efficient process. Variations cover electrically stimulated huff and puff backflowing or producing steps to control wellbore resistance and distribute the heat uniformly in the proper direction. A pressure maintenance fluid may also be injected in the depleted part of the formation.
REFERENCES:
patent: 3547193 (1970-12-01), Gill
patent: 3605888 (1971-09-01), Crowson et al.
patent: 3946809 (1976-03-01), Hagedorn
patent: 3948319 (1976-04-01), Pritchett
patent: 4037655 (1977-07-01), Carpenter
patent: 4084637 (1978-04-01), Todd
patent: 4456065 (1984-06-01), Heim et al.
patent: 4489782 (1984-12-01), Perkins
patent: 4499948 (1985-02-01), Perkins
Atlantic Richfield Company
Folzenlogen M. David
Martin Michael E.
Suchfield George A.
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