Method of completing a well in an unconsolidated formation
AssigneeSchlumberger Technology Corporation
InventorsAndrew Acock, Steve Hoover
Life of this patent
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Abstract
Herein is described a method of completing an interval of a cased well drilled through incompetent formation. This method includes a combination of three successive operations: zero-degree phasing perforation of a relatively small portion of the interval to be completed, consolidation of the formation zone around the perforations and injection of a propped fracturing fluid above fracture pressure to create a gap between the cement and the borehole and pack this gap with a proppant held by a proppant flowback-retention agent.
Claims19
A method of completing a non-completed interval provided with a cemented casing in a subterranean well, said interval drilled in an unconsolidated formation, the method comprising the succeeding steps of:
- a. perforating a portion of the interval length, wherein all the perforations are oriented in the same direction;
- then
- b. performing a consolidation treatment to the zone of the formation around the perforations and then;
- c. pumping a viscous fracturing fluid into the consolidated formation, through the perforations, at a rate and pressure sufficient to hydraulically fracturing the subterranean formation, wherein at least a portion of the fracturing fluid comprises a proppant and a proppant flowback-retention agent and wherein the injection and pressure rate of the injected fracturing fluid is selected so as to promote a screening out of the fracture at the tip to create a short wide fracture.
Dependencies are inferred from the claim text.