Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Patent
1989-08-16
1990-12-18
Suchfield, George A.
Wells
Processes
Perforating, weakening, bending or separating pipe at an...
166 50, 166308, E21B 4326
Patent
active
049779613
ABSTRACT:
A technique is disclosed for creating parallel vertical fractures from a horizontal or inclined wellbore. Magnitude and orientation of in situ stresses within the formation are determined, and a wellbore is drilled in the direction of the minimum horizontal in situ stress. The wellbore casing is then perforated in the vertical plane by selectively placing a pair of opposing perforations within the casing. Vertical fractures are then initiated and propagated in the plane perpendicular to the minimum horizontal in situ stress by applying hydraulic pressure to fluid in the wellbore casing.
REFERENCES:
patent: 3835928 (1974-09-01), Strubhar et al.
patent: 3878884 (1975-04-01), Raleigh
patent: 4669546 (1987-06-01), Jennings, Jr. et al.
patent: 4687061 (1987-08-01), Uhri
patent: 4850431 (1989-07-01), Austin et al.
Economides, M. J. et al., "Performance and Stimulation of Horizontal Wells", World Oil, Jun. 1989, pp. 41-45.
SPE Paper 18982, "Limited Communication Between Hydraulic Fracture and (Deviated) Wellbore", Veeken et al., Mar. 6, 1989.
SPE Paper 18542, "On Fracturing Horizontal Wells", M. Y. Soliman, Nov. 1, 1988.
Chevron Research Company
Keeling Edward J.
Suchfield George A.
Touslee Robert D.
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