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US 10,883,039 B2Granted
Injection fluids for oil recovery and methods of making and using the same
AssigneeExxonMobil Research and Engineering Company
InventorsAditya Jaishankar, Mohsen S. Yeganeh, Alex G. K. Lee, Daniel P. Cherney, Mobae Afeworki, Sartaj S. Ghai
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Abstract
Viscous aqueous injections fluids including polymers having hydrophilic moieties and hydrophobic groups and at least one of crude oil emulsions and amphiphilic diblock copolymers are provided herein. Methods of making the aqueous injection fluids, and methods of using the aqueous injection fluids for oil recovery are also provided.
Claims12
An aqueous injection fluid comprising:
- a polymer comprising hydrophilic moieties and a plurality of hydrophobic groups;
- an aqueous crude oil microemulsion, wherein the crude oil of the aqueous crude oil microemulsion has a total acid number (TAN) greater than about 0.4;
- a basic compound;
- and
- an amphiphilic diblock copolymer, wherein the amphiphilic diblock copolymer is selected from the group consisting of polyethylene-block-polyethylene glycol, polyethylene-block-polypropylene glycol, polyethylene glycol-block-polystyrene, polyethylene oxide-block-polycaprolactone, and a combination thereof;
- wherein the polymer is present in an amount of about 0.05 wt % to about 1.0 wt % and the crude oil is present in an amount of about 0.10 wt % to about 1.0 wt %.
3 more elements
Dependencies are inferred from the claim text.