Wells – Processes – Separate steps of fracturing or attacking formation
Patent
1977-04-28
1978-08-29
Novosad, Stephen J.
Wells
Processes
Separate steps of fracturing or attacking formation
166263, 166303, 166306, E21B 4324
Patent
active
041097220
ABSTRACT:
Heavy or viscous oils may be recovered from subterranean deposits by one or more wells each of which is provided with at least two separate communication means from the surface of the earth, one in fluid communication with the upper part of the formation and the other well being in fluid communication with the lower part of the formation, each of said communication means being completed so as to permit injection of steam or mixtures of steam and other materials into the formation and production of heated viscous petroleum therefrom. A relatively impermeable barrier is formed between the portions of the formation where the communication is established, oriented horizontally and extending some distance into the formation. The oil recovery process comprises several separate phases of operation. In the first, steam is injected into the formation using both communication means simultaneously for a period of time followed by a soak period if desired, followed by production of heated oil from both parts of the formation using both communication means simultaneously. In the second phase, steam is injected into only one of the communication means, which may be the one in communication with either the top or bottom part of the formation, and oil production is taken from the other communication means. The horizontally-oriented impermeable barrier forces the steam to move a considerable distance into the formation away from the point of injection before moving back toward the production inlet. The injection-production sequences are then reversed, so the process effectively pressure pulses the formation to increase the distance into the formation that the push-pull steam injection process is effective.
REFERENCES:
patent: 2365591 (1944-12-01), Ranney
patent: 3120263 (1964-02-01), Hoyt
patent: 3120264 (1964-02-01), Barron
patent: 3180414 (1965-04-01), Parker
patent: 3372750 (1968-03-01), Satter et al.
patent: 3455392 (1969-07-01), Prats
patent: 3682245 (1972-08-01), Argabright et al.
patent: 3822748 (1974-07-01), Allen et al.
Park Jack H.
Widmyer Richard H.
Novosad Stephen J.
Park Jack H.
Ries Carl G.
Suchfield George A.
Texaco Inc.
LandOfFree
Thermal oil recovery method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermal oil recovery method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal oil recovery method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1627420