Hydraulic fracturing process and compositions

Details Hydraulic fracturing process and compositions Hydraulic fracturing process and compositions

1982-11-08

1985-09-17

Guynn, Herbert B.

Compositions

Leather or fur treating

166308, E21B 4326

Patent

active

045419353

ABSTRACT:
Improved fracturing processes are described which use novel aqueous hydraulic fracturing fluids. The fluids comprise: (a) an aqueous medium, and (b) a thickening amount of a thickener composition comprising (i) a water-soluble or water-dispersible interpolymer having pendant hydrophobic groups chemically bonded thereto, (ii) a nonionic surfactant having a hydrophobic group(s) that is capable of associating with the hydrophobic groups on said organic polymer, and (iii) a water-soluble electrolyte. Additionally, the fluids preferably contain a stabilizing amount of a thiosulfate salt. As an example, an interpolymer of acrylamide and dodecyl acrylate was used in combination with a nonionic surfactant (HLB of about 10 to about 14) to thicken a dilute aqueous solution of KCl and sodium thiosulfate; the aqueous solution had excellent properties for use as a high temperature hydraulic fracturing fluid.

REFERENCES:
patent: 3022248 (1962-02-01), Anderson et al.
patent: 3739848 (1973-06-01), Lawson et al.
patent: 3922173 (1975-11-01), Misak
patent: 4250044 (1981-02-01), Hinkel
patent: 4432881 (1984-02-01), Evani

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