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US 5,211,240 AGranted
Method for favoring the injection of fluids in producing zone
AssigneeInstitut Francais du Petrole
InventorsClaude Gadelle, Jacques Lessi, Herve Petit
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AssigneeInstitut Francais du Petrole
InventorsClaude Gadelle, Jacques Lessi, Herve Petit
Estimating the term…
In a drain (2) fitted with a perforated casing (3), a fluid under pressure is injected in various locations by selectively changing the position of the injection points in relation to these locations by means of a pipe (4). The position of the injection ports and/or the area thereof is varied through the selective opening of valves or by displacing an injection pipe (4). The density of the perforations of the casing (3) and/or of the injection pipe (4) can also be varied. A sweeping of the reservoir crossed by the drain is achieved by injecting for example a hot gaseous fluid such as steam under pressure and the density of the perforations (11) of a pipe (4) is for example selected in such a way that the amount of heat transferred to the formation is substantially constant along the drain.
A method for controlling the application of fluid under pressure which is injected into a producing zone crossed by at least one deflected drain, into which a pipe having a lower part fitted with at least one injection port communicating with the drain is introduced, in order to promote the recovery of effluents from a surrounding geological formation, the method comprising injecting a fluid under pressure through the pipe and selectively varying the fluid pressure applied to the formation in any determined location of the drain by appropriate selective changing of a distance between said location and the at least one port for injecting the fluid into the drain and/or an area of fluid injection via the at least one injection port communicating with the drain.
A method for controlling the application of a fluid under pressure which is injected into a producing zone crossed by at least one deflected drain, into which a pipe having a lower part fitted with at least one injection port communicating with the drain is introduced, in order to promote the recovery of effluents from a surrounding geological formation, the method comprising injecting a fluid under pressure through the pipe and selectively varying the fluid pressure applied to the formation in any determined location of the drain by appropriate selective changing of a distance between said location and the at least one injection port communicating with the drain;
A method for selectively controlling the application of fluid under pressure in a producing zone for improving recovery of effluents from a geological formation by injecting the fluid through at least one deflected drain traversing said producing zone which comprises positioning in said deflected drain an injection pipe connected to a fluid source, and providing said injection pipe with a plurality of injection ports opening in said deflected drain and distributing fluid at selected different places along said deflected drain by a selective opening of the injection ports, thereby controlling the distance between each of said places and the injection ports.
A method for selectively controlling the application of fluid under pressure to a producing zone for improving recovery of effluents from a geological formation by injecting the fluid through at least one deflected drain traversing said producing zone which comprises positioning in said deflected drain an injection pipe connected to a fluid source and providing said injection pipe with a plurality of injection ports opening in said deflected drain with selectable opening areas and distributing fluid at selected different places along said deflected drain by a selective opening of said injection ports, thereby controlling the distance between each of said places and the injection ports and/or the respective opening areas of said injection ports.
Dependencies are inferred from the claim text.