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:
May. 14, 2013
Filed:
Jun. 22, 2011
Ian Ralph Collins, Middlesex, GB;
Gary Russell Jerauld, Houston, TX (US);
Arnaud Lager, Anchorage, AK (US);
Patrick Lee Mcguire, Eagle River, AK (US);
Kevin Webb, Worthing, GB;
Ian Ralph Collins, Middlesex, GB;
Gary Russell Jerauld, Houston, TX (US);
Arnaud Lager, Anchorage, AK (US);
Patrick Lee McGuire, Eagle River, AK (US);
Kevin Webb, Worthing, GB;
BP Exploration Operating Company Limited, Middlesex, GB;
BP Corporation North America Inc., Warrenville, IL (US);
Abstract
Hydrocarbons are recovered from subterranean formations by waterflooding. The method comprises passing an aqueous displacement fluid via an injection well through a porous and permeable sandstone formation to release oil and recovering said released oil from a production well spaced from said injection well, wherein (a) the sandstone formation comprises at least one mineral having a negative zeta potential under the formation conditions; (b) oil and connate water are present in the pores of the formation; and (c) the fraction of the divalent cation content of the said aqueous displacement fluid to the divalent cation content of said connate water is less than 1.