DIVERSION BY COMBINING DISSOLVABLE AND DEGRADABLE PARTICLES AND FIBERS
First Claim
1. A method of using a fluid within a subterranean formation, comprising:
- forming a fluid comprising fibers and particles;
introducing perforation sealers into the fluid;
introducing the fluid into the subterranean formation;
forming a seal in a perforation in the formation; and
allowing the fibers or particles or both to degrade.
1 Assignment
0 Petitions
Accused Products
Abstract
In downhole treatments in the oilfield, ball sealers seated in perforations may not fully seal and may leak fluid through gaps and asperities between the balls and the perforations. A method is given for improving the sealing of ball sealers in perforations by adding a sealing agent that forms a plug in the gaps and severely restricts or eliminates fluid flow. The sealing agent is preferably degradable or soluble, malleable fibers slightly larger than the gaps. Optionally, the particles may be non-degradable, rigid, of different shapes, and smaller than the gaps but able to bridge them. Mixtures of sealing agents may be used. The sealing agent may be added with the ball sealers, after the ball sealers, or both.
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Citations
20 Claims
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1. A method of using a fluid within a subterranean formation, comprising:
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forming a fluid comprising fibers and particles; introducing perforation sealers into the fluid; introducing the fluid into the subterranean formation; forming a seal in a perforation in the formation; and allowing the fibers or particles or both to degrade. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of using a fluid within a subterranean formation, comprising:
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forming a fluid comprising fibers and particles; introducing perforation sealers into the fluid; introducing the fluid into the subterranean formation; observing a pressure measurement of the subterranean formation; and allowing the fibers or particles or both to degrade. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification