Patent · US Active

Methods for producing seawater based, high temperature viscoelastic surfactant fluids with low scaling tendency

US11078408B2 · kind B2 · utility

1Cited by

10References

8Claims

0Family size

Assignee

SAUDI ARABIAN OIL COMPANY · SA

Inventors

Leiming Li · Sugar Land, US
Feng Liang · Canton, US
Tao Chen · Dhahran, SA

Key dates

Filing date	Sep 24, 2019
Grant date	Aug 3, 2021
Priority date	—
Expiry date	Sep 24, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2208/30
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Embodiments of the present disclosure are directed to a method of producing a viscoelastic surfactant (VES) fluid, the VES fluid comprising desulfated seawater. The method of producing the VES fluid comprises adding an alkaline earth metal halide to seawater to produce a sulfate precipitate. The method further comprises removing the sulfate precipitate to produce the desulfated water. The method further comprises adding a VES and one or more of a nanoparticle viscosity modifier or a polymeric modifier to the desulfated seawater. Other embodiments are directed to VES fluids that maintain a viscosity greater than 10 cP at temperatures above 250° F.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.