Simultaneous matrix acidizing using acids with different densiti

Details Simultaneous matrix acidizing using acids with different densiti Simultaneous matrix acidizing using acids with different densiti

1993-05-03

1994-03-29

Novosad, Stephen J.

Wells

Processes

Separate steps of fracturing or attacking formation

166307, E21B 4327, E21B 33138

Patent

active

052976289

ABSTRACT:
A method for simultaneously matrix acidizing two spaced apart zones of a carbonate containing formation. Initially, a lower density acid is injected into an upper zone of said formation hereby forming wormholes which make this zone more permeable. Simultaneous with the injection of the lower density acid, a higher density acid is injected into a lower spaced apart zone of said formation at a pressure sufficient to simultaneously form wormholes within said lower zone thereby acidizing each zone simultaneously. Thereafter, a solidifiable viscous gel with gel breakers is directed into the upper and lower zones which gel enters the wormholes and forms a solid gel therein which precludes entry of additional acid while displacing the acid further into the formation. Subsequently, additional acid is introduced into the upper and lower zones which acid bypasses the wormholes containing the solid gel and penetrates substantially further thereby substantially increasing the permeability of the formation.

REFERENCES:
patent: 2850098 (1958-09-01), Moll et al.
patent: 3076762 (1963-02-01), Dill
patent: 3233672 (1966-02-01), Carpenter
patent: 3354957 (1967-11-01), Every et al.
patent: 4007789 (1977-02-01), Clampitt
patent: 4237974 (1980-12-01), Scherubel
patent: 4787456 (1988-11-01), Jennings, Jr. et al.
patent: 4842068 (1989-06-01), Vercaemer et al.
patent: 4917185 (1990-04-01), Jennings, Jr. et al.
patent: 5018578 (1991-05-01), El Raba

Affiliated with

Also associated with

Rating

Simultaneous matrix acidizing using acids with different densiti does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Simultaneous matrix acidizing using acids with different densiti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous matrix acidizing using acids with different densiti will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-785970