Wells – Processes – With indicating – testing – measuring or locating
Patent
1990-04-02
1991-06-25
Novosad, Stephen J.
Wells
Processes
With indicating, testing, measuring or locating
166245, 166271, 166308, E21B 4326, E21B 4330
Patent
active
050258591
ABSTRACT:
In a fluid flood process for enhancing the secondary recovery of hydrocarbons from a hydrocarbon permeable and hydrocarbon bearing reservoir using plural recovery wells, each adjacent at least one injection well. Each well has a well bore. A horizontal injection fracture extends substantially horizontally from the well bore of each of selected injection well bores. A horizontal recovery fracture extends substantially horizontally from the well bore of each of selected recovery wells and is vertically displaced from and overlapping with one or more of the injection fractures of the adjacent injection wells. A pair of overlapping injection and recovery fractures, that would overlap with a low permeable layer in the reservoir, is selectively positioned vertically at one side of such layer in the reservoir. Another pair of overlapping injection and recovery fracture is selectively positioned, with the injection fracture thereof, adjacent at the lower limit and the recovery fracture thereof adjacent at the upper limit of the reservoir at the respective well.
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Hanson Merle E.
Thorson Lewis D.
Comdisco Resources, Inc.
Novosad Stephen J.
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