Recovery of heavy crude oil from shallow formations by in situ c

Details Recovery of heavy crude oil from shallow formations by in situ c Recovery of heavy crude oil from shallow formations by in situ c

1984-11-02

1987-01-27

Suchfield, George A.

Wells

Processes

With indicating, testing, measuring or locating

166261, 166269, E21B 43243

Patent

active

046388648

ABSTRACT:
This invention comprises two steps for improving in situ combustion in shallow reservoirs: (1) use small well patterns preferably with injection to producing wells distance about 200 to 250 feet; and (2) after the front reaches a distance where the air flux is about 5 SCF/(ft.sup.2 -hr), or expressed another way, where the rate of frontal advance is about 0.4 ft/day, allow the air to "ride" on top of the pay zone while simultaneously water is injected at the oil-water contact below the air entry at the sand face of the injection well.

REFERENCES:
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patent: 3369601 (1968-02-01), Bond et al.
patent: 3727686 (1973-04-01), Prates et al.
patent: 3978920 (1976-09-01), Bandyopadhyay et al.
patent: 4042026 (1977-08-01), Pusch et al.
patent: 4068715 (1978-01-01), Wu
patent: 4415031 (1983-11-01), Hunt, III
patent: 4493369 (1985-01-01), Odeh et al.

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