- Patent Title: Oil production using multistage surfactant polymer chemical flood
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Application No.: US15538424Application Date: 2015-12-21
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Publication No.: US10094207B2Publication Date: 2018-10-09
- Inventor: Jeffrey George Southwick
- Applicant: SHELL OIL COMPANY
- Applicant Address: US TX Houston
- Assignee: SHELL OIL COMPANY
- Current Assignee: SHELL OIL COMPANY
- Current Assignee Address: US TX Houston
- International Application: PCT/US2015/067137 WO 20151221
- International Announcement: WO2016/106230 WO 20160630
- Main IPC: E21B43/20
- IPC: E21B43/20 ; C09K8/584

Abstract:
A process for recovering oil from an oil-bearing formation is disclosed comprising providing a first oil recovery formulation comprising a first surfactant able to create low interfacial tension with reservoir crude oil; injecting the first oil recovery formulation into the oil-bearing formation via an injection well (201); providing a second oil recovery formulation having a second surfactant with a higher solubility in water than the first formulation; injecting the second oil recovery formulation into the oil-bearing formation via the injection well; and producing oil to a production well (203).
Public/Granted literature
- US20180002591A1 OIL PRODUCTION USING MULTISTAGE SURFACTANT POLYMER CHEMICAL FLOOD Public/Granted day:2018-01-04
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