Wells – Valves – closures or changeable restrictors
Patent
1977-06-14
1978-05-23
Novosad, Stephen J.
Wells
Valves, closures or changeable restrictors
E21B 4300
Patent
active
040905640
ABSTRACT:
A method for the economic recovery of significant additional quantities of oil and gas from a geo-pressured water-drive oil reservoir where oil production has ceased by conventional production techniques and equipment. The method increases the recovery from this type of reservoir, after primary depletion by conventional techniques, by producing the water (and a quantity of oil) from the wells at an abnormally high rate of flow and thereby induces a significant pressure drop in the reservoir remote from the well. This will then induce a significant release of solution gas from the oil through the reservoir. Since the residual hydrocarbon saturation in a water-wet porous media is a constant value for a given reservoir rock, a part of the gas released from solution will increase the hydrocarbon saturation and allow a portion of the oil and gas to become mobile and migrate to the producing wells to be recovered.
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Cook, Jr. Harold L.
Geer Ernest C.
Novosad Stephen J.
Transco Energy Company
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