CO.sub.2 -induced in-situ gelation of polymeric viscosifiers for

Details CO.sub.2 -induced in-situ gelation of polymeric viscosifiers for CO.sub.2 -induced in-situ gelation of polymeric viscosifiers for

1985-12-06

1987-04-14

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524127, 524206, 524424, C09K 700

Patent

active

046579443

ABSTRACT:
A water permeability contrast correction process to improve the sweep efficiency of waterflooding which involves the sequential injection of (1) an optional aqueous preflush slug to adjust connate water salinity, (2) an aqueous thickened slug comprising a sequestered polyvalent metal cation such as aluminum citrate and a gelable polymeric viscosifier such as polyacrylamide, (3) carbon dioxide to decrease the pH of the polymer slug which triggers the delayed in-situ gelation of said thickened slug to preferentially decrease water permeability in highly permeable thief zones, and (4) an aqueous drive fluid.

REFERENCES:
patent: 2573738 (1951-11-01), Smith et al.
patent: 3386509 (1968-06-01), Froning
patent: 3679000 (1972-07-01), Kaufman
patent: 3699042 (1972-10-01), Browning et al.
patent: 3727688 (1973-04-01), Clampitt
patent: 3727689 (1973-04-01), Clampitt
patent: 3741894 (1973-06-01), Storfer
patent: 3749172 (1973-07-01), Hessert et al.
patent: 3753971 (1973-08-01), Browning et al.
patent: 3762476 (1973-10-01), Gall
patent: 3768565 (1973-10-01), Persinski et al.
patent: 3782467 (1974-01-01), Hessert
patent: 3785437 (1974-01-01), Clampitt et al.
patent: 3795276 (1974-03-01), Eilers et al.
patent: 3815681 (1974-06-01), Richardson
patent: 3845822 (1974-11-01), Clampitt et al.
patent: 3909423 (1975-09-01), Hessert et al.
patent: 3926258 (1975-12-01), Hessert et al.
patent: 3952806 (1976-04-01), Trantham
patent: 3955998 (1976-05-01), Clampitt et al.
patent: 3978928 (1976-09-01), Clampitt
patent: 4018286 (1977-04-01), Gall et al.
patent: 4026361 (1977-05-01), Knapp et al.
patent: 4040484 (1977-08-01), Hessert
patent: 4055502 (1977-10-01), Swanson
patent: 4068714 (1978-01-01), Clampitt et al.
patent: 4068719 (1978-01-01), Clampitt et al.
patent: 4068720 (1978-01-01), Hessert et al.
patent: 4103742 (1978-08-01), Swanson
patent: 4110130 (1978-08-01), Hessert et al.
patent: 4129361 (1978-10-01), Threlkeld et al.
patent: 4146486 (1979-03-01), Hessert et al.
patent: 4169797 (1979-10-01), Johnson, Jr. et al.
patent: 4172041 (1979-10-01), Clampitt et al.
patent: 4191657 (1980-03-01), Swanson
patent: 4290485 (1981-09-01), Free et al.
patent: 4296811 (1981-10-01), Morris et al.
46 C.A. 6792c (1976).
Mellor, A Comprehensive Treatise on Inorganic and Theoretical Chemistry XI, 284-5 (Longman, London 1931).

Affiliated with

Also associated with

Rating

CO.sub.2 -induced in-situ gelation of polymeric viscosifiers for does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with CO.sub.2 -induced in-situ gelation of polymeric viscosifiers for, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CO.sub.2 -induced in-situ gelation of polymeric viscosifiers for will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1786122