公开(公告)号：US20170355896A1

公开(公告)日：2017-12-14

申请号：US15647922

申请日：2017-07-12

Applicant: Chevron U.S.A. Inc.

Inventor： Varadarajan Dwarakanath ,  Robert Matthew Dean ,  Will S. Slaughter ,  Dustin Luke Walker ,  Sophany Thach

IPC: C09K8/58 ,  E21B43/16 ,  C09K8/52 ,  C09K8/03

CPC classification number: C09K8/58 ,  C09K8/032 ,  C09K8/52 ,  E21B43/16

Abstract: Aspects of the invention relate to compositions and methods that are used for the remediation of near-wellbore damage in regions of formations near injection wells in communication with subterranean reservoirs. The damage is caused by previous injection of a polymer emulsion into the injection well. A specific aspect is a method of injecting into the subterranean reservoir a composition containing an olefin sulfonate, a sulfosuccinate, and a chemical selected from an alcohol alkoxylated sulfate, an alcohol alkoxylated carboxylate, or a combination thereof. The polymer emulsion is thereby dissolved, cleaned and/or flushed away from the region near the injection well.

公开(公告)号：US09752071B2

公开(公告)日：2017-09-05

申请号：US14208685

申请日：2014-03-13

Applicant: Chevron U.S.A. Inc.

Inventor： Varadarajan Dwarakanath ,  Robert Matthew Dean ,  Will S. Slaughter ,  Dustin Luke Walker ,  Sophany Thach

IPC: E21B43/16 ,  C09K8/58 ,  C09K8/03 ,  C09K8/52

CPC classification number: C09K8/58 ,  C09K8/032 ,  C09K8/52 ,  E21B43/16

Abstract: Aspects of the invention relate to compositions and methods that are used for remediation of near-wellbore damage. A specific aspect is a composition comprising an olefin sulfonate, a sulfosuccinate, and a chemical selected from the group consisting of an alcohol alkoxylated sulfate, an alcohol alkoxylated carboxylate, or a combination thereof.

公开(公告)号：US10011757B2

公开(公告)日：2018-07-03

申请号：US15647922

申请日：2017-07-12

Applicant: Chevron U.S.A. Inc.

Inventor： Varadarajan Dwarakanath ,  Robert Matthew Dean ,  Will S. Slaughter ,  Dustin Luke Walker ,  Sophany Thach

IPC: E21B43/16 ,  C09K8/58 ,  C09K8/52 ,  C09K8/03

CPC classification number: C09K8/58 ,  C09K8/032 ,  C09K8/52 ,  E21B43/16

Abstract: Aspects of the invention relate to compositions and methods that are used for the remediation of near-wellbore damage in regions of formations near injection wells in communication with subterranean reservoirs. The damage is caused by previous injection of a polymer emulsion into the injection well. A specific aspect is a method of injecting into the subterranean reservoir a composition containing an olefin sulfonate, a sulfosuccinate, and a chemical selected from an alcohol alkoxylated sulfate, an alcohol alkoxylated carboxylate, or a combination thereof. The polymer emulsion is thereby dissolved, cleaned and/or flushed away from the region near the injection well.