Wells – Processes – Specific low fluid loss feature for fracturing fluid or...
Patent
1986-02-13
1987-04-28
Novosad, Stephen J.
Wells
Processes
Specific low fluid loss feature for fracturing fluid or...
166302, 166308, E21B 3600, E21B 4326, E21B 43267
Patent
active
046606432
ABSTRACT:
A method for hydraulic fracturing a subterranean formation region to control the fracture extent in vertical and horizontal directions characterized by the injection of cold liquid into the formation region to precool the region and reduce the stresses in the formation region so that a hydraulic fracture may be propagated at a lower fluid injection pressure. The shape of the cooled region may be controlled by injection of various quantities of leakoff control agent during injection of the cold liquid and extension of the hydraulic fracture may be carried out simultaneously with the cold liquid flooding or by raising the pressure after the flood front has progressed a desired radial extent from the wellbore. The fracturing operation may be completed by injecting a pad of cold liquid with a high concentration of leakoff control agent to seal the fracture face followed by injection of liquid carrying a sufficient quantity of proppant material to maintain the fracture width and conductivity at the desired level.
REFERENCES:
patent: 3323594 (1967-06-01), Huitt et al.
patent: 3405062 (1968-10-01), Kuhn
patent: 4109721 (1978-08-01), Slusser
patent: 4476932 (1984-10-01), Emery
Oil and Gas Journal Tech-Report, Reprint of Article by J. O. Scott, the Oil and Gas Journal, Jan. 14, 1957, pp. 91-107, 166-308.
Society of Petroleum Engineers Journal, "Changes in Earth Stresses Around a Wellbore Caused by Radially Symmetrical Pressure and Temperature Gradients" Apr. 1984, T. K. Perkins and J. A. Gonzalez, pp. 129-140.
Society of Petroleum Engineers Journal, "The Effect of Thermoelastic Stresses on Injection Well Fracturing" Feb. 1985, T. K. Perkins and J. A. Gonzalez, pp. 78-88.
Atlantic Richfield Company
Martin Michael E.
Novosad Stephen J.
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