Method for hydraulic fracturing cased wellbores

Details Method for hydraulic fracturing cased wellbores Method for hydraulic fracturing cased wellbores

1990-10-10

1991-12-24

Britts, Ramon S.

Wells

Processes

Specific propping feature

166308, E21B 43267

Patent

active

050743597

ABSTRACT:
A hydraulic fracturing method for earth formations which are penetrated by inclined wellbores wherein the near wellbore region which exhibits the maximum tensile stress in response to hydraulic pressure in the wellbore is determined, and cased wellbores are perforated at the point of maximum tensile stress resulting from fracture initiation. The fracture is subsequently propagated and propped open by proppant-laden fluids having progressively increasing proppant concentrations so that the near wellbore region of the fracture is held propped open to maintain sufficient conductivity between the main fracture body and the wellbore.

REFERENCES:
patent: 4669546 (1987-06-01), Jennings et al.
patent: 4749038 (1988-06-01), Shelley
patent: 4830106 (1989-05-01), Uhri
patent: 4834181 (1989-05-01), Uhri et al.
patent: 4850431 (1989-07-01), Austin et al.
patent: 4867241 (1989-09-01), Strubhar
Yew, C. H. et al., On the Fracture Design of Deviated Wells, SPE Paper 19722, Soc. Pet. Engr., 64th Annual Tech. Conf. San Antonio, Oct. 8-11, 1989.

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