公开(公告)号：DE502006002198D1

公开(公告)日：2009-01-08

申请号：DE502006002198

申请日：2006-03-03

Applicant: BASF SE

Inventor： HEIDENFELDER THOMAS ,  GUZMANN MARCUS ,  WITTELER HELMUT ,  OSSMER UWE

IPC: E21B43/27 ,  E21B37/06

Abstract: Methods of increasing permeability in a carbonatic rock formation, the methods comprising: providing an alkanesulfonic acid; and introducing the alkanesulfonic acid into the carbonatic rock formation.

公开(公告)号：CA2669627A1

公开(公告)日：2008-06-05

申请号：CA2669627

申请日：2007-11-29

Applicant: BASF SE

Inventor： OETTER GUENTER ,  STEINBRENNER ULRICH ,  OSSMER UWE ,  GUZMANN MARCUS

IPC: C09K8/035 ,  B01J19/06 ,  C10M171/00 ,  C11D1/00

Abstract: The present invention relates to a thickener system which is suitable for preparing a thickener composition and consists of (A) at least one anionic surfactant A and (B) at least one polymer B which comprises at least one hyd rophobic group and at least one hydrophilic group, the concentration of the polymer B in the thickener composition being below the overlap concentration c* of the polymer, to the use of an inventive thickener system for preparin g a thickener composition, to a thickener composition comprising an inventiv e thickener system and to the use of inventive thickener compositions.