Wells – Processes – With indicating – testing – measuring or locating
Patent
1988-04-25
1989-12-26
Novosad, Stephen J.
Wells
Processes
With indicating, testing, measuring or locating
166271, 166245, 166308, E21B 4326, E21B 4330
Patent
active
048891860
ABSTRACT:
A process for enhanced recovery of hydrocarbons, such as oil from a geological reservoir through an injection well bore and a plurality of production well bores which extend into the geological reservoir. Flooding is performed through at least one injection well bore into a lower portion of the geological reservoir, to thereby form a substantially horizontal injection fracture which may have an upward vertical component. The vertical component is elongated along an azimuth. The vertical components of any significance size are not always formed on horizontal fractures. However, to avoid intersecting horizontal production fractures into the vertical components, certain procedures must be followed. To this end, the azimuth of the elongation of the vertical component is determined. The producing well bores are then disposed, substantially parallel with the azimuth of the elongation of the vertical component and along a line displaced from the injection well bore. Substantially horizontal production fractures are formed through the production well bores out into overlapping relation with and displaced above the injection fracture, without intersecting the vertical component. This arrangement allows for a vertical sweep, using a waterflood, through the geological reservoir between the overlapping portions of the injection fracture and the production fractures to sweep out the hydrocarbons.
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Hanson Merle E.
Thorson Lewis D.
Comdisco Resources, Inc.
Novosad Stephen J.
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