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A method for well treatment by forming a temporary plug in a fracture, a perforation, a wellbore, or more than one of these locations, in a well penetrating a subterranean formation is provided, in which the method of well treatment includes: injecting a slurry comprising a degradable material, allo

A method for well treatment by forming a temporary plug in a fracture, a perforation, a wellbore, or more than one of these locations, in a well penetrating a subterranean formation is provided, in which the method of well treatment includes: injecting a slurry comprising a degradable material, allowing the degradable material to form a plug in a perforation, a fracture, or a wellbore in a well penetrating a formation; performing a downhole operation; and allowing the degradable material to degrade after a selected time such that the plug disappears.

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What is claimed is: 1. A method of well treatment, comprising: a) injecting a slurry comprising a degradable fiber, b) allowing the degradable fiber to form a plug in one or more than one of a perforation, a fracture, and a wellbore in a well penetrating a formation; c) performing a downhole operat

What is claimed is: 1. A method of well treatment, comprising: a) injecting a slurry comprising a degradable fiber, b) allowing the degradable fiber to form a plug in one or more than one of a perforation, a fracture, and a wellbore in a well penetrating a formation; c) performing a downhole operation; and d) allowing the degradable fiber to at least partially degrade after a selected duration such that the plug disappears. 2. The method of claim 1, wherein the degradable fiber is selected from a polymer of lactide, glycolide, polylactic acid, polyglycolic acid, amide, and mixtures thereof. 3. The method of claim 1, wherein the degradable fiber is present at a concentration of no less than 40 lbm/1,000 gal (4.8 g/L). 4. The method of claim 1, wherein the operation is a fracturing operation and the method further comprises injecting a second material to induce a screenout during the fracturing operation. 5. The method of claim 1, wherein the slurry further comprises a particulate material. 6. The method of claim 5, wherein the particulate material is degradable. 7. The method of claim 5, wherein the particulate material is a proppant. 8. The method of claim 7, wherein the proppant comprises particles having a distribution of sizes. 9. The method of claim 1, wherein the slurry further comprises an additive for delaying degradation of the degradable fiber. 10. The method of claim 1, wherein the slurry further comprises an additive for accelerating degradation of the degradable fiber. 11. The method of claim 1, further comprising modeling to optimize parameters for the well treatment, wherein the step of injecting the slurry is based on the optimized parameters. 12. The method of claim 11, wherein the optimized parameters comprise the selected duration before the degradable fiber degrades. 13. The method of claim 1, wherein the well treatment comprises hydraulic fracturing. 14. The method of claim 13, wherein the hydraulic fracturing comprises injecting a pad, said pad comprising the degradable fiber. 15. The method of claim 14, wherein the step of injecting the slurry is performed at the tail end of fracturing a layer. 16. The method of claim 13, wherein hydraulic fracturing is applied to more than one layer of a multilayer formation. 17. The method of claim 16, wherein no bridge plug or sand plug is placed in the wellbore before fracturing a subsequent layer. 18. The method of claim 16, wherein the slurry further comprises a proppant, wherein the degradable fiber forms the plug in the fracture by bridging with the proppant when placed in the fracture. 19. The method of claim 1, wherein the well treatment comprises acid fracturing or waterfrac. 20. The method of claim 1, wherein the selected duration for the plug to disappear is between 0.5 and 6 hours. 21. The method of claim 1, wherein the step of injecting the slurry is via coiled tubing installed in the well. 22. The method of claim 1 wherein the degradable fiber comprises a polyvinyl ester. 23. The method of claim 1, wherein the treatment is used to isolate a region selected from the fracture, a production zone, and a part of the wellbore, wherein the part of the wellbore is above the formation pressure. 24. The method of claim 1, wherein the degradable fiber is selected from limestone fibers and glass fibers. 25. The method of claim 1, wherein the well treatment comprises chemical strimulation.