Extraction Methods and Systems for Recovery of Oil from Reservoirs Containing Mobile Water

Content Provider	The Lens
Description	La présente invention concerne, selon certains modes de réalisation, un procédé d'extraction pour récupérer du pétrole à partir d'un réservoir pétrolifère comprenant de l'eau libre. Le procédé d'extraction comprend l'étape consistant à injecter un premier solvant dans le réservoir pétrolifère par l'intermédiaire du ou des puits d'injection pour former un premier mélange, le premier mélange comprenant le premier solvant, une première partie d'eau libre et une première partie de pétrole. Le procédé d'extraction comprend en outre les étapes consistant à : récupérer le premier mélange à partir du ou des puits de production pour produire un premier mélange de pétrole récupéré, le premier mélange de pétrole récupéré comprenant le premier solvant, la première partie d'eau libre et la première partie de pétrole ; séparer le premier mélange de pétrole récupéré pour produire une première fraction de pétrole récupéré, qui est séparée de la première partie d'eau libre et du premier solvant ; et injecter un second solvant dans le réservoir pétrolifère par l'intermédiaire du ou des puits d'injection pour former un second mélange, le second mélange comprenant le second solvant, une seconde partie d'eau libre et une seconde partie de pétrole. Le procédé d'extraction comprend également les étapes consistant à : récupérer le second mélange à partir du ou des puits de production pour produire un second mélange de pétrole récupéré, le second mélange de pétrole récupéré comprenant le second solvant, la seconde partie d'eau libre et la seconde partie de pétrole ; et séparer le second mélange de pétrole récupéré pour produire une seconde fraction de pétrole récupéré, qui est séparée de la seconde partie d'eau libre et du second solvant.
Abstract	The present disclosure relates to, according to some embodiments, an extraction process for recovering an oil from an oil reservoir comprising a mobile water. The extraction process includes the step of injecting a first solvent into the oil reservoir through the at least one injection well to form a first mixture, the first mixture comprising the first solvent, a first portion of mobile water, and a first portion of oil, Additionally, the extraction process includes the steps of recovering the first mixture from the at least one production well to produce a first recovered oil mixture, the first recovered oil mixture comprising the first solvent, the first portion of the mobile water, and the first portion of oil; separating the first recovered oil mixture to produce a first recovered oil fraction that is separated from the first portion of mobile water and the first solvent; and injecting a second solvent into the oil reservoir through the at least one injection well to form a second mixture, the second mixture comprising the second solvent, a second portion of mobile water, and a second portion of oil. The extraction process also includes the steps of recovering the second mixture from the at least one production well to produce a second recovered oil mixture, the second recovered oil mixture comprising the second solvent, the second portion of the mobile water, and the second portion of oil, and separating the second recovered oil mixture to produce a second recovered oil fraction that is separated from the second portion of mobile water and the second solvent.
Related Links	https://www.lens.org/lens/patent/009-639-270-139-243/frontpage
Language	English
Publisher Date	2019-03-14
Access Restriction	Open
Alternative Title	Procédés Et Systèmes D'extraction Pour Récupérer Du Pétrole À Partir De Réservoirs Contenant De L'eau Libre
Content Type	Text
Resource Type	Patent
Date Applied	2018-09-05
Agent	Thurlow, Matthew
Applicant	Cec North Star Energy Ltd
Application No.	2018051070
Claim	What is claimed is: An extraction process for recovering oil from an oil reservoir comprising mobile water, the extraction process comprising: (a) establishing at least one injection well and at least one production well; (b) injecting a first solvent into the oil reservoir through the at least one injection well .to form a first mixture, the first mixture comprising the first solvent, a first portion of mobile water, and a first portion of oil; (c) recovering the first mixture from the at least one production well to produce a first recovered oil mixture, the first recovered oil mixture comprising the first solvent, the first portion of the mobile water, and the first portion of oil; (d) separating the first recovered oil mixture to produce a first recovered oil fraction that is separated from the first portion of mobile water and the first solvent; (e) injecting a second solvent into the oil reservoir through the at least one injection well to form a second mixture, the second mixture comprising the second solvent, a second portion of mobile water, and a second portion of oil; (f) recovering the second mixture from the at least one production well to produce a second recovered oil mixture, the second recovered oil mixture comprising the second solvent, the second portion of the mobile water, and the second portion of oil; and (g) separating the second recovered oil mixture to produce a second recovered oil fraction that is separated from the second portion of mobile water and the second solvent. The extraction process according to Claim 1 , wherein the first solvent comprises water. The extraction process according to Claim 1, wherein the second solvent comprises water. The extraction process according to Claim 1, further comprising combining the first recovered oil mixture and the second recovered oil mixture to produce a combined recovered oil mixture, wherein the combined recovered oil fraction comprises a yield of about 50% to about 90% of the oil present in the oil reservoir prior to the extraction process, within the first 10 years of oil recovery. The extraction process according to Claim 1, wherein the first solvent is at a temperature from about 10 °C to about 40 °C during the step of injecting the first solvent into the oil reservoir through the at least one injection wel The extraction process according to Claim 1 , wherein the second solvent is at a temperature from about 10 °C to about 40 °C during the step of injecting the second solvent into the oil reservoir through the at least one injection wel The extraction process according to Claim 1 , wherein the first solvent comprises a methane, an ethane, a propane, a butane, a pentane, a hexane, and combinations thereof. The extraction process according to Claim 1 , wherein the second solvent comprises a terpene or combination of terpenes, a turpentine, an alcohol, an aromatic hydrocarbon, a carbon dioxide, and combinations thereof. The extraction process according to Claim 2, wherein the water is present at a concentration from about 0.1 % to about 50 %, by volume of the first solvent. The extraction process according to Claim 3, wherein the water is present at a concentration from about 0.1 % to about 50 %, by volume of the second solvent. 1 1. The extraction process according to Claim 1 , wherein the first solvent comprises water at a concentration from about 0.1 % to about 50 %, by volume of the first solvent, and wherein the second solvent comprises water at a concentration from about 0.1 % to about 50 %, by volume of the second solvent. The extraction process according to Claim 1, further comprising injecting the separated first solvent into the oil reservoir through the at least one injection well to form a combined separated first solvent and oil mixture. The extraction process according to Claim 1 , further comprising injecting the separated second solvent into the oil reservoir through the at least one injection well to form a combined separated second solvent and oil mixture. The extraction process according to Claim 1 , further comprising injecting water into the oil reservoir through the at least one injection well to form an injected water and oil mixture. The extraction process according to Claim 14, wherein the water comprises a water exogenous to the oil reservoir, a water recovered from the oil reservoir, or a combination thereof. The extraction process according to Claim 14, wherein injecting water into the oil reservoir through the at least one injection well is performed after the injecting the second solvent into the oil reservoir through the at least one injection wel The extraction process according to claim 1 , further comprising: (h) adding a third solvent selected from the group consisting of C0 2 , and N 2 , into the oil reservoir through the at least one injection well; (i) shutting the oil reservoir for a time of from about 1 day to about 7 days to form a combined third solvent and second residual oil mixture; and (j) opening the oil reservoir; and recovering at least a portion of the third solvent and second residual oil mixture from the at least one production well to produce a recovered third solvent and second residual oil mixture. An extraction system for extracting and recovering an oil from an oil reservoir comprising mobile water, the extraction system comprising: (a) at least one injection well connected to the oil reservoir through an injection stream; (b) at least one production well connected to the oil reservoir through a recovery stream; (c) a first solvent reservoir connected to the injection well through a first solvent stream, wherein the injection well is configured to receive a first solvent from the first solvent reservoir through the first solvent stream; (d) a second solvent reservoir connected to the injection well through a second solvent stream, wherein the injection well is configured to receive a second solvent from the second solvent reservoir through the second solvent stream; (e) a production treating facility connected to the production well through an oil recovery stream, wherein the production treating facility is configured to receive a first solvent and oil mixture and a second solvent and oil mixture from the production well; and (f) a recovered oil reservoir connected to the production well through an oil recovery stream, wherein the recovered oil reservoir is configured to receive a recovered oil from the production treating facility through a recovered oil stream. The extraction system of claim 18, wherein the first solvent reservoir is connected to the production treating facility through a first solvent recycle stream, and wherein the first solvent reservoir is configured to receive a recycled first solvent from the production treating facility through the first solvent recycle stream. The extraction system of claim 18, wherein the second solvent reservoir is connected to the production treating facility through a second solvent recycle stream, and wherein the second solvent reservoir is configured to receive a recycled second solvent from the production treating facility through the second solvent recycle stream.
CPC Classification	Earth Or Rock Drilling;Obtaining Oil; Gas; Water; Soluble Or Meltable Materials Or A Slurry Of Minerals From Wells MATERIALS FOR MISCELLANEOUS APPLICATIONS; NOT PROVIDED FOR ELSEWHERE
Extended Family	018-373-847-164-648 156-708-619-278-251 045-013-313-614-069 142-854-380-303-896 155-585-871-290-152 038-970-824-592-018 181-381-594-903-835 009-639-270-139-243 126-547-728-307-215 059-761-230-256-843 191-133-009-722-305 103-282-130-984-179 107-484-602-813-783
Patent ID	2019046938
Inventor/Author	Kantzas Apostolos Bryan Jonathan L Richardson Robert Jones Donald E H
IPC	E21B43/16 E21B43/30 E21B43/34
Status	Pending
Simple Family	018-373-847-164-648 156-708-619-278-251 045-013-313-614-069 142-854-380-303-896 155-585-871-290-152 038-970-824-592-018 181-381-594-903-835 009-639-270-139-243 126-547-728-307-215 059-761-230-256-843 191-133-009-722-305 103-282-130-984-179 107-484-602-813-783
CPC (with Group)	E21B43/40 C09K8/594 E21B43/164 E21B43/166 E21B37/06
Issuing Authority	United States Patent and Trademark Office (USPTO)
Kind	Patent Application Publication