Method for injecting fluid into a formation to produce oil
AssigneeDevon Energy Production Company, L.P.
InventorsWarren Foster Peter MacPhail, Wolfgang Friedrich Johann Deeg
Life of this patent
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Abstract
A method and system for enhancing petroleum production are provided, in which a fracturing operation can be conducted in a formation through a string and then petroleum is displaced from the fractured formation by selectively injecting fluid into selected fractures in the formation while other non-selected fractures remain without fluid injection. The injected fluid flows out into the fractured formation and enhances recovery from the non-selected fractures. Petroleum is selectively collected from the non-selected fractures.
Claims20
A wellbore string for installation in a wellbore defined within a wellbore wall in communication with a formation containing reservoir fluid, the wellbore string comprising:
- an injection conduit;
- a production conduit extending parallel to the injection conduit but fluidly isolated from the injection conduit, the production conduit having a wall with an outer wall surface and defining a production conduit fluid passage;
- at least one injection flow regulator connected into the string and including:
- an outer surface,
- an injection passage through which the injection conduit passes,
- a preformed fracturing port for providing fluid communication of fracturing fluid therethrough to the outer surface, and
- a closure for the preformed fracturing port configured for manipulation by a fracturing actuator tool;
- and
- at least one production flow regulator connected into the string and axially offset along the string from the at least one injection flow regulator and including:
- an exterior surface,
- an injection opening through which the injection conduit extends,
- a production bore connected in communication with the production conduit fluid passage, and
- a production port for providing fluid communication between the production bore and the exterior surface.
A wellbore string for installation in a horizontal wellbore defined within a wellbore wall in communication with a formation containing reservoir fluid, the wellbore string comprising:
- an injection conduit;
- a production conduit extending parallel to the injection conduit but fluidly isolated from the injection conduit, the production conduit having a wall with an outer wall surface and defining a production conduit fluid passage;
- multiple injection flow regulators connected into the string, each injection flow regulator comprising:
- an outer surface,
- an injection passage through which the injection conduit passes,
- an injection port for providing fluid communication from the injection passage to the outer surface,
- a fracturing port for providing fluid communication to the outer surface,
- a production passage through which the production conduit fluid passage extends and wherein the fracturing port opens from the production passage to the outer surface, and
- a closure for the fracturing port configured for blocking the fracturing port to prevent fluid flow therethrough when desired;
- and
- multiple production flow regulators connected into the string and axially offset along the string from the injection flow regulators, wherein the production flow regulators and the injection flow regulators are arranged in alternating fashion along the string, wherein each production flow regulator comprises:
- an exterior surface,
- an injection opening through which the injection conduit extends,
- a production bore connected in communication with the production conduit fluid passage, and
- a production port for providing fluid communication between the production bore and the exterior surface.
A wellbore string for installation in a wellbore defined within a wellbore wall in communication with a formation containing reservoir fluid, the wellbore string comprising:
- an injection conduit;
- a production conduit extending parallel to the injection conduit but fluidly isolated from the injection conduit, the production conduit having a wall with an outer wall surface and defining a production conduit fluid passage;
- at least one injection flow regulator connected into the string and including:
- an outer surface,
- an injection passage through which the injection conduit passes,
- a preformed port for providing fluid communication therethrough to the outer surface, and
- a closure for the preformed port configured for blocking the preformed port to prevent fluid flow therethrough when desired;
- at least one production flow regulator connected into the string and axially offset along the string from the at least one injection flow regulator and including:
- an exterior surface,
- an injection opening through which the injection conduit extends,
- a production bore connected in communication with the production conduit fluid passage, and
- a production port for providing fluid communication between the production bore and the exterior surface;
- and
- wherein the production port of the production flow regulator is configured to provide choked inflow, or the injection port of the injection flow regulator is configured to provide choked outflow.
Dependencies are inferred from the claim text.