Patent · US Active

Process for acidizing using retarded acid formulations

US10131831B2 · kind B2 · utility

4Cited by

8References

20Claims

0Family size

Assignee

BASF SE

Inventors

Shawn McCleskey Rimassa · Houston, US
Walter Bertkau · Ludwigshafen, DE
Joseph P. Borst · Plymouth, US

Key dates

Filing date	Mar 23, 2015
Grant date	Nov 20, 2018
Priority date	—
Expiry date	Mar 23, 2035

Classification

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

Abstract

Method of increasing the permeability in subterranean formations comprising rock that is soluble by acid, in particular carbonatic formations, using a formulation comprising at least an acid and a retarding surfactant which is an amphoteric surfactant. Preferably, the acid comprises methanesulfonic acid.

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