Wells – Processes – Graveling or filter forming
Patent
1989-08-23
1990-08-07
Neuder, William P.
Wells
Processes
Graveling or filter forming
166 51, E21B 4304
Patent
active
049459910
ABSTRACT:
A method for gravel packing a well penetrating an unconsolidated or poorly consolidated subterranean oil or gas reservoir. The well employs a borehole casing with perforation tunnels for fluid communication between the borehole casing and a substantial portion of the reservoir. A sand screen is located inside the well casing and in juxtaposition with the perforation tunnels forming an annulus between the borehole casing and the sand screen. One or more conduits are positioned coaxially adjacent the exterior of the sand screen with openings to provide fluid communication between the conduit and a substantial portion of the annulus between the borehole casing and the sand screen. A slurry of gravel is injected down through the annulus between the borehole casing and the sand screen until the annulus is filled with gravel. If injection of the slurry of gravel forms a gravel bridge in any portion of the annulus being packed thereby plugging the annulus between the casing and the sand screen, the slurry of gravel will continue to flow down the conduit and into the annulus below the gravel bridge thereby completely packing the annulus between the sand screen and the borehole casing. The oil or gas in the reservoir is then produced through the gravel packed borehole casing and the sand screen. If desired, the slurry of gravel may be injected down the well and up the conduit and annulus to accomplish complete packing. The method is also applicable to placing gravel packs in an open-hole wellbore adjacent to a substantial portion of an unconsolidated or poorly consolidated subterranean oil or gas reservoir.
REFERENCES:
patent: 2755861 (1956-07-01), Smet
patent: 3421586 (1969-01-01), Solum
patent: 3482627 (1969-12-01), Nebolsine
patent: 4558742 (1985-12-01), Huang et al.
Hager Jr. George W.
McKillop Alexander J.
Mobile Oil Corporation
Neuder William P.
Speciale Charles J.
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