Well injection and production method and system
AssigneeNCS Multistage Inc.
InventorsWarren Foster Peter MacPhail, Jerry Chin Shaw
Life of this patent
Estimating the term…
Abstract
A method and system for enhancing petroleum production are provided, in which petroleum is displaced from a fractured formation by selectively injecting fluid into selected fractures in the formation without injecting into the other non-selected fractures. 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.
Claims26
A method for petroleum production from a well having a horizontal well section with a wellbore inner surface in communication with a plurality of fractures in a formation containing reservoir fluid, the method comprising:
- injecting an injection fluid via injection zones provided in the horizontal well section in fluid communication with fractures in the formation, wherein each injection zone comprises an injection valve comprising a sliding sleeve and an injection choke configured for choking outflow of the injection fluid into the formation, wherein each injection choke has a throat diameter configured to generate sufficient pressure resistance to limit a rate at which the injection fluid is supplied into the formation at a corresponding location of the injection valve;
- and
- collecting production fluid from the formation via production zones provided in the horizontal well section, the production zones being fluidly sealed with respect to the injection zones through an annulus in the horizontal well section, being in fluid communication with formation fractures that communicate with the fractures into which the injection fluid is injected, and being provided in alternating relation with the injection zones along the horizontal well section, and wherein each production zone comprises a production valve that includes a production choke configured for choking inflow of the production fluid from the formation.
A method for reservoir fluid production from a well having a horizontal well section with a wellbore inner surface in communication with a plurality of fractures in a formation, the method comprising:
- injecting an injection fluid via a first set of zones provided in the horizontal well section in fluid communication with fractures in the formation, wherein each zone of the first set comprises an injection valve, wherein each injection valve includes an injection choke configured for choking outflow of the injection fluid into the formation, wherein each injection choke has a throat diameter configured to generate sufficient pressure resistance to limit a rate at which the injection fluid is supplied into the formation at a corresponding location of the injection valve;
- and
- collecting reservoir fluid from the formation via a second set of zones provided in the horizontal well section, the second set of zones being fluidly sealed with respect to the first set of zones through an annulus in the horizontal well section, being in fluid communication with formation fractures that communicate with the fractures into which the injection fluid is injected, and being provided offset with respect to the injection zones along the horizontal well section, wherein each zone of the second set comprises a production valve;
- and
- choking fluid flow into the formation via the injection chokes or out of the formation via the production valves, or a combination thereof.
A method for reservoir fluid production from a well having a horizontal well section with a wellbore inner surface in communication with a plurality of fractures in a formation, the method comprising:
- injecting an injection fluid via injection zones provided in the horizontal well section in fluid communication with fractures in the formation, wherein each injection zone comprises an injection valve and an injection choke configured to generate pressure resistance to limit a rate at which the injection fluid is supplied into the formation at the corresponding injection valve to distribute the injection fluid into the formation along the horizontal well section, wherein each injection choke has a throat diameter configured to generate sufficient pressure resistance to limit a rate at which the injection fluid is supplied into the formation at a corresponding location of the injection valve;
- and
- collecting reservoir fluid from the formation via production zones provided in the horizontal well section, the production zones being fluidly sealed with respect to the injection zones through an annulus in the horizontal well section, being in fluid communication with formation fractures that communicate with the fractures into which the injection fluid is injected, and being provided in alternating relation with the injection zones along the horizontal well section.
Dependencies are inferred from the claim text.