Self-diverting pre-flush acid for sandstone

Details Self-diverting pre-flush acid for sandstone Self-diverting pre-flush acid for sandstone

2003-02-20

2010-02-23

Gulakowski, Randy (Department: 1796)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S203000, C507S266000, C507S267000, C507S277000, C507S245000

Reexamination Certificate

active

07666821

ABSTRACT:
Embodiments of the Present Invention relate to a reversibly thickenable non-polymeric fluid that has low viscosity in strong acid, gels when the acid concentration is reduced by only a small amount, and is subsequently decomposed by the acid. In particular it relates to an aqueous mixture of zwitterionic surfactants, inorganic acids, and organic acids Most particularly it relates to the use of this fluid as a diverting agent for easily-damaged sandstones, for example prior to matrix acidizing.

REFERENCES:
patent: 3724549 (1973-04-01), Walter
patent: 4007789 (1977-02-01), Clampitt
patent: 4324669 (1982-04-01), Norman et al.
patent: 4591447 (1986-05-01), Kubala
patent: 4695389 (1987-09-01), Kubala
patent: 4790958 (1988-12-01), Teot
patent: 4807703 (1989-02-01), Jennings, Jr.
patent: 5360558 (1994-11-01), Pakulski et al.
patent: 5979557 (1999-11-01), Card et al.
patent: 6035936 (2000-03-01), Whalen
patent: 6148917 (2000-11-01), Brookey et al.
patent: 6258859 (2001-07-01), Dahayanake et al.
patent: 6306800 (2001-10-01), Samuel et al.
patent: 6367548 (2002-04-01), Purvis et al.
patent: 6399546 (2002-06-01), Chang et al.
patent: 6435277 (2002-08-01), Qu et al.
patent: 6482866 (2002-11-01), Dahayanake et al.
patent: 6497290 (2002-12-01), Misselbrook et al.
patent: 6569814 (2003-05-01), Brady et al.
patent: 6605570 (2003-08-01), Miller et al.
patent: 6637517 (2003-10-01), Samuel et al.
patent: 6667280 (2003-12-01), Chang et al.
patent: 6703352 (2004-03-01), Dahayanake et al.
patent: 2002/0004464 (2002-01-01), Nelson et al.
patent: 2002/0023752 (2002-02-01), Qu et al.
patent: 2002/0033260 (2002-03-01), Lungwitz et al.
patent: 2002/0147114 (2002-10-01), Dobson et al.
patent: 2003/0119680 (2003-06-01), Chang et al.
patent: 2003/0134751 (2003-07-01), Lee et al.
patent: 2003/0139298 (2003-07-01), Fu et al.
patent: 2004/0009880 (2004-01-01), Fu
patent: 2004/0176478 (2004-09-01), Dahayanake et al.
patent: 2005/0067165 (2005-03-01), Cawiezel et al.
patent: 2005/0107265 (2005-05-01), Sullivan et al.
patent: 1109356 (1981-09-01), None
patent: 2012837 (1979-08-01), None
patent: 2354541 (2001-08-01), None
patent: 2372058 (2002-08-01), None
patent: 01/29369 (2001-04-01), None
patent: 03/054352 (2003-07-01), None
patent: 03/093641 (2003-11-01), None
U.S. Appl. No. 10/065,144—A Novel Fluid System having Controllable Reversible Viscosity.
SPE 80274—Application of Novel Diversion Acidizing Techniques to Improve Gas Production in Heterogeneous FormationBy Xugang Wang, Honglan Zou, Jun Tian, Fuxiang Zhang, Xingsheng Cheng and Suzhen Li, Feb. 2003.
SPE 56529 Case Study of a Novel Acid-Diversion Technique in Carbonate Reservoirs. F.F.Chang, T.Love, C.J.Affeld, J.B.Blevins III, R.L.Thomas, and D.K.Fu.

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