公开(公告)号：US20200157411A1

公开(公告)日：2020-05-21

申请号：US16682046

申请日：2019-11-13

Applicant: SHELL OIL COMPANY

Inventor： David PEREZ-REGALADO ,  Timothy Elton KING ,  Julian Richard BARNES

IPC: C09K8/584 ,  C09K8/588 ,  B01F17/00 ,  E21B43/16

Abstract: A composition comprising from 60-80 wt % alcohol alkoxy sulfates, 2-20 wt % of polyalkoxy sulfates and water wherein the alcohol alkoxy sulfates are of the formula R—O—(C3H6O)x—(C2H4O)y—SO3 where R is an alkyl group having from 9 to 18 carbon atoms, x is from 1 to 40, y is from 0 to 20 and x+y is from 1 to 60.

公开(公告)号：US20170247603A1

公开(公告)日：2017-08-31

申请号：US15592661

申请日：2017-05-11

Applicant: SHELL OIL COMPANY

Inventor： David PEREZ-REGALADO ,  Michael Joseph DOLL ,  Timothy Elton KING ,  Julian Richard BARNES ,  Lori Ann CROM

IPC: C09K8/584 ,  E21B43/16

CPC classification number: C09K8/584 ,  E21B43/16

Abstract: The invention relates to a method of treating a hydrocarbon containing formation, comprising: a) providing an aqueous composition which comprises i) an internal olefin sulfonate (IOS) surfactant; ii) an acid which has a pKa between 4 and 12; and iii) the conjugate base of the acid mentioned under ii), to at least a portion of the hydrocarbon containing formation, by combining the aqueous composition with a hydrocarbon removal fluid to produce an injectable fluid, wherein the hydrocarbon removal fluid comprises 1) water and 2) divalent cations in a concentration of 50 or more parts per million by weight (ppmw), and injecting the injectable fluid into the hydrocarbon containing formation; and b) allowing the surfactant from the injectable fluid to interact with the hydrocarbons in the hydrocarbon containing formation.