METHOD OF USING SCALE FORMATION ON A SLOTTED LINER TO REDUCE WATER PRODUCTION

摘要

A method for reducing undesired water production from a hydrocarbon reservoir, wherein scale formation/deposition in a wellbore from localized water cut increases is used for zonal isolation. Slots or other aperture types are provided in a casing length such as a slotted liner, to encourage scale formation/deposition adjacent water-producing zones, thus isolating such zones and preferentially producing from hydrocarbon-producing zones.

主权项

1. A method for reducing undesired water production from a hydrocarbon wellbore, the method comprising the steps of:
a. providing a casing member having an external wall and an internal wall; b. forming at least one aperture in the casing member extending between an inlet in the external wall and an outlet in the internal wall, the at least one aperture configured to allow passage of a fluid therethrough from outside the casing member to inside the casing member, the at least one aperture comprising:
a first flow restriction adjacent the inlet; anda second flow restriction adjacent the outlet; c. positioning the casing member in the hydrocarbon wellbore; d. producing the fluid through the at least one aperture to surface; e. allowing a pressure drop in the fluid across the first flow restriction, and where the fluid is primarily water causing precipitation of a precipitate from the fluid within the at least one aperture; and f. allowing the second flow restriction to restrict flow of the fluid and the precipitate out of the outlet.