Self diverting matrix acid

Details Self diverting matrix acid Self diverting matrix acid

2005-11-16

2009-08-18

Suchfield, George (Department: 3676)

Wells

Processes

Separate steps of fracturing or attacking formation

C166S282000, C166S283000, C166S307000, C166S308300, C507S240000, C507S241000, C507S244000, C507S277000, C507S934000

Reexamination Certificate

active

07575054

ABSTRACT:
A method is described for treating a subterranean formation with a low viscosity fluid system that contains a viscoelastic surfactant at a concentration too low to viscosify the fluid, but that is concentrated in the formation so that the fluid system gels. The fluid also contains a formation-dissolving agent. The fluid is used in acidizing, acid fracturing, and diversion.

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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.
SPE 80274—Application of Novel Diversion Acidizing Techniques to Improve Gas Production in Heterogeneous Formation. By Xugang Wang, Honglan Zou, Jun Tian, Fuxiang Zhang, Xingsheng Cheng and Suzhen Li.

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