The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2015
Filed:
Dec. 23, 2009
Patrick Lee Mcguire, Eagle River, AK (US);
Euthimios Vittoratos, Anchorage, AK (US);
Patrick Lee McGuire, Eagle River, AK (US);
Euthimios Vittoratos, Anchorage, AK (US);
BP Corporation North America Inc., Warrenville, IL (US);
Abstract
Method for increasing recovery of crude oil from a reservoir having an oil-bearing porous subterranean formation with a permeability of greater than 10 millidarcies, the formation including rock having pores with crude oil and connate water having a multivalent cation content present within the pores. The crude oil in the formation has an API gravity of less than 30°, a viscosity greater than 1 centipoise, and undissolved solids suspended therein. Injection water having undissolved solids suspended therein, a total dissolved solids content of 30,000 ppm or less and a multivalent cation content such that a ratio of the multivalent cation content of the injection water to the multivalent cation content of the connate water is less than 0.9, is injected into the formation, to produce an emulsion within the formation. The emulsion has an undissolved suspended solids content of at least 0.05% by weight of emulsion.