Acidizing stimulation method using a pH buffered acid solution

Details Acidizing stimulation method using a pH buffered acid solution Acidizing stimulation method using a pH buffered acid solution

2006-06-13

2006-06-13

Bates, Zakiya W. (Department: 3676)

Wells

Processes

Dissolving or preventing formation of solid oil deposit

C166S300000, C166S307000, C166S312000

Reexamination Certificate

active

07059414

ABSTRACT:
A method of stimulating subterranean formations in oil and gas wells using a high pH buffered acid system. The method may be used to treat sandstone formations wherein the pH buffered acid system is used as the preflush or overflush or both. The method consists of introducing into the well a hydrofluoric acid containing sandstone acidizing solution either prior to or subsequent to introduction of the pH buffered acid system. The pH buffered acid system may further be used in the treatment of carbonate reservoirs. The pH of the buffered acid solution is substantially equivalent to that of the pH of the acidizing solution. The buffered acid solution is void of either hydrofluoric acid or hydrofluoric acid precursors.

REFERENCES:
patent: 2652360 (1953-09-01), Bond et al.
patent: 2742425 (1956-04-01), Holbrook
patent: 2885004 (1959-05-01), Perry
patent: 3828854 (1974-08-01), Templeton et al.
patent: 3868996 (1975-03-01), Lybarger et al.
patent: 3889753 (1975-06-01), Richardson
patent: 3934651 (1976-01-01), Nierode et al.
patent: 3953340 (1976-04-01), Templeton et al.
patent: 4090563 (1978-05-01), Lybarger et al.
patent: 4096914 (1978-06-01), McLaughlin et al.
patent: 4122896 (1978-10-01), Scheuerman et al.
patent: 4137972 (1979-02-01), McLaughlin et al.
patent: 4261421 (1981-04-01), Watanabe
patent: 4267887 (1981-05-01), Watanabe
patent: 4304676 (1981-12-01), Hall
patent: 4480694 (1984-11-01), Watanabe
patent: 4487265 (1984-12-01), Watanabe
patent: 4548732 (1985-10-01), Scheuerman et al.
patent: 4646835 (1987-03-01), Watkins et al.
patent: 4648456 (1987-03-01), Lamb et al.
patent: 4703803 (1987-11-01), Blumer
patent: 4739833 (1988-04-01), Watanabe et al.
patent: 4877459 (1989-10-01), Cockrell, Jr. et al.
patent: 5031700 (1991-07-01), McDougall et al.
patent: 5039434 (1991-08-01), Watkins et al.
patent: 5082058 (1992-01-01), Blumer
patent: 5529125 (1996-06-01), Di Lullo Arias et al.
patent: 5979556 (1999-11-01), Gallup et al.
patent: 6308778 (2001-10-01), Girgis-Ghaly et al.
patent: 6443230 (2002-09-01), Boles et al.
patent: 6531427 (2003-03-01), Shuchart et al.
patent: 2002/0070022 (2002-06-01), Chang et al.
patent: WO 01/02698 (2001-01-01), None
patent: WO 01/83639 (2001-11-01), None
Fredd, C.N. et al.,Alternative Stimulation Fluids and Their Impact on Carbonate Acid,1996, Society of Petroleum Engineers (Paper No. 31074).
Van Domelen, M.S. et al.,Alternate Acid Blends for HPHT Applications,1995, Society of Petroleum Engieers (Paper No. 13563).
Scheueman, R.F.,A Buffer-Regulated HF Acid for Sandstone Acidizing to 550 Degree,1988, Society of Petroleum Engineers (Paper No. 30419).
Smith, C.F.,Fracture Acidizing in High Temperature Limestone,1970, American Institute of Mining.
BJ S3Acid™ System,Product Information, BJ Services Company, 2002.
BJSandstone AcidSMSystem,Product Information, BJ Services Company, 1996.

Affiliated with

Also associated with

Rating

Acidizing stimulation method using a pH buffered acid solution does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Acidizing stimulation method using a pH buffered acid solution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acidizing stimulation method using a pH buffered acid solution will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3677153