Method using lignosulfonates for high-temperature plugging

Details Method using lignosulfonates for high-temperature plugging Method using lignosulfonates for high-temperature plugging

1977-05-09

1978-02-21

Novosad, Stephen J.

Wells

Processes

In situ combustion

166272, 166288, 166294, E21B 33138, E21B 4324

Patent

active

040747573

ABSTRACT:
A method of selective plugging of undesirable high permeability streaks and channels in oil-bearing reservoirs during high temperature (250.degree. F or higher) injection recovery processes such as steamflooding, underground combustion, flooding of a naturally occurring high-temperature reservoir or the like. Improved sweep efficiency can be effected by injecting a gel-forming solution consisting essentially of sodium or ammonium lignosulfonate and water or brine in the absence of other gelation promoters and then allowing the high temperatures of the underground formation to promote gelation. Optionally, a precooling water injection step can be used prior to placement of the gel-forming solution. This system has the advantage of gel times which are sufficiently long at temperatures in excess of 250.degree. F to permit placement of large volumes characteristic of commercial use. This method is particularly useful in selectively forming firm, strong gels in thief zones for steamflooding recovery operations.

REFERENCES:
patent: 3180748 (1965-04-01), Holmgren et al.
patent: 3198249 (1965-08-01), Willman
patent: 3547195 (1970-12-01), Elkins
patent: 3566067 (1971-03-01), Shelton et al.
patent: 3638729 (1972-02-01), Parker
patent: 3669188 (1972-06-01), Coles et al.
patent: 3897827 (1975-08-01), Felber et al.

Affiliated with

Also associated with

Rating

Method using lignosulfonates for high-temperature plugging does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method using lignosulfonates for high-temperature plugging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method using lignosulfonates for high-temperature plugging will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-121504