Wells – Processes – Separating material entering well
Patent
1998-10-26
2000-10-03
Suchfield, George
Wells
Processes
Separating material entering well
166 50, 166 541, 166306, 166313, 166370, 210747, 405128, E21B 4314, E21B 4338
Patent
active
061259365
ABSTRACT:
A dual completion method for oil/gas wells, which method is designed to prevent or at least minimize, coning of water in a hydrocarbon producing well. In a preferred embodiment the method includes the steps of perforating a common zone in the oil/gas well at vertically-spaced locations and producing water-free oil and/or other hydrocarbons through the upper perforations and the well annulus or tubing, as well as preferably hydrocarbon-free water from the bottom perforations through well tubing. Careful control of hydrocarbon and water production maintains a stable hydrocarbon and water contact in the production and prevents coning of the water into the hydrocarbon and in some cases prevents coning of the hydrocarbon into the water. Production of hydrocarbon and water in this manner facilitates an equal pressure drop acting near the hydrocarbon/water contact in the well and formation to keep the water from rising in the formation. Accordingly, water is produced at a controlled rate lower in the formation than the water level, to produce a pressure sink equal to that created by the hydrocarbon production at the top of the formation. Accordingly, hydrocarbons are produced with minimum water coning at a rate that maximizes profitability.
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Harrison John M.
Suchfield George
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