Wells – Processes – Cyclic injection then production of a single well
Patent
1989-12-06
1991-08-06
Suchfield, George A.
Wells
Processes
Cyclic injection then production of a single well
166271, 166272, 166280, 166297, 166308, E21B 4324, E21B 43267
Patent
active
050369180
ABSTRACT:
A method for controlling formation fines when producing viscous oil from a consolidated or loosely consolidated formation having at least two wells therein. Both wells are perforated and hydraulically fractured at a lower level via a viscous gel fluid having a size and temperature resistant proppant therein. The proppant is of a size sufficient to filter formation fines from the oil. Cyclic steam-flooding and oil production are continued in one well, while the other well is shut-in. Prior to steam break through, the lower perforated intervals are isolated with production packers containing knock-out plugs. A correlatable selected upper interval in both wells is perforated and hydraulic fracturing is repeated. Cyclic steam-flooding and oil production are continued in the upper interval until steam break through occurs. Cyclic steam-flooding is ceased and production strings are directed through the knock-out plugs into the lower interval. Thereafter, steam is directed down the annulus from a first well into a second well in the upper interval, while producing oil from the lower interval. Thereafter, steam is circulated down both wells into the upper formation causing the formation of a "heat chest" and the production of hydrocarbonaceous fluids from the lower interval via the production string.
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Jennings, Jr. Alfred R.
Smith Roger C.
Malone Charles A.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Suchfield George A.
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