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.

公开(公告)号：US20160177173A1

公开(公告)日：2016-06-23

申请号：US15058748

申请日：2016-03-02

Applicant: SHELL OIL COMPANY

Inventor： Paulus Johannes KUNKELER ,  Sipke Hidde WADMAN ,  Michael Joseph DOLL ,  Julian Richard BARNES ,  Lori Ann PRETZER

IPC: C09K8/584

CPC classification number: C09K8/584

Abstract: The invention relates to a method of treating a hydrocarbon containing formation, comprising: a) providing an aqueous composition which comprises i) a surfactant of the formula R—O—[R′—O]x—X wherein R is a hydrocarbyl group, R′—O is an alkylene oxide group, x is the number of alkylene oxide groups R′—O, x is 0 or greater than 0, and X is a sulfate moiety; ii) an acid which has a pKa between 6 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 100 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.

Abstract translation: 本发明涉及一种处理含烃地层的方法，包括：a）提供水性组合物，其包含i）式R-O- [R'-O] x -X的表面活性剂，其中R是烃基， R'-O是环氧烷基，x是环氧烷基团R'-O的数目，x是0或大于0，X是硫酸盐基团; ii）pKa在6和12之间的酸; 和iii）通过将含水组合物与烃去除流体组合以产生可注射流体，将ii）中所述的酸的共轭碱加到至少一部分含烃地层中，其中除烃流体包括1）水 和2）浓度为100重量份/百万重量ppm（ppmw）的二价阳离子，并将注入流体注入到含烃地层中; 和b）允许来自可注射流体的表面活性剂与含烃地层中的烃相互作用。