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Improved methods and apparatus for completing an unconsolidated subterranean zone penetrated by a well bore are provided. The methods basically comprise the steps of placing a slotted liner having an internal sand screen disposed therein with dividers extending between the screen and liner, isolatin

Improved methods and apparatus for completing an unconsolidated subterranean zone penetrated by a well bore are provided. The methods basically comprise the steps of placing a slotted liner having an internal sand screen disposed therein with dividers extending between the screen and liner, isolating the slotted liner and the well bore in the zone and injecting particulate material into flow paths formed by the dividers between the sand screen and the slotted liner and into the annulus between the slotted liner and the well bore to thereby form packs of particulate material therein to prevent the migration of fines and sand with produced fluids.

대표청구항 ▼

1. An improved method of completing an unconsolidated subterranean zone subject to migration of formation fines and sand with produced fluids penetrated by a well bore having an upper and lower end comprising the steps of:(a) placing in a lower end of said well bore in said zone a slotted liner havi

1. An improved method of completing an unconsolidated subterranean zone subject to migration of formation fines and sand with produced fluids penetrated by a well bore having an upper and lower end comprising the steps of:(a) placing in a lower end of said well bore in said zone a slotted liner having open slots therein and having an internal sand screen disposed therein with dividers extending between the liner and screen whereby a first annulus with alternative flow paths is formed between said sand screen and said slotted liner and a second annulus is formed between said slotted liner and said lower well bore end; (b) isolating said second annulus between said slotted liner and said lower well bore end in said zone from said upper well bore end; and (c) injecting particulate material into either or both said second annulus between said slotted liner and said well bore and at least one of said flow paths between said sand screen and said slotted liner whereby said particulate material is caused to be packed in said first and second annuli by movement through the open slots in said slotted liner and the migration of formation fines and sand with fluids produced into said well bore from said zone is prevented upon subsequent production of fluids from said subterranean zone.