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Title: Method for gravel packing wells

This patent describes a method for gravel packing a well that penetrates an unconsolidated or poorly consolidated subterranean oil or gas reservoir. It comprises: providing a borehole casing through the reservoir; perforating the casing at preselected intervals therealong to form at least one set of longitudinal, perforation tunnels adjacent a substantial portion of the reservoir; locating a sand screen inside the casing and in juxtaposition with the perforation tunnels, an annulus being formed between the sand screen and the casing; positioning a conduit in juxtaposition with the sand screen extending substantially the length of the sand screen and having its upper extremity open to fluids; injecting a fluid slurry containing gravel down through the annulus and conduit whereby the fluid portion of the slurry is forced out of the annulus through the perforation tunnels into the reservoir and the gravel portion of the slurry deposited in the annulus and forced into the perforation tunnels into the formation; sizing the cross-sectional area of the conduit and the annulus so that if gravel forms a bridge in a portion of the annulus thereby blocking the flow of fluid slurry through the the annulus, fluid slurry containing gravel will continue to flow throughmore » the conduit and into the annulus around the gravel bridge; and terminating the injection of the slurry.« less
Publication Date:
OSTI Identifier:
Report Number(s):
US 4945991; A
PPN: US s 7-397217
Resource Type:
Resource Relation:
Patent File Date: 23 Aug 1989
Country of Publication:
United States
02 PETROLEUM; 03 NATURAL GAS; NATURAL GAS WELLS; PACKINGS; OIL WELLS; WELL COMPLETION; WELLS 020300* -- Petroleum-- Drilling & Production; 030300 -- Natural Gas-- Drilling, Production, & Processing