Basf Se Corporation

Wintershall Holding Gmbh

Benjamin Wenzke

Christian Bittner

Christian E Spindler

Roland Reichenbach-Klinke

Björn Langlotz

Christian Spindler

Hans-Christian Raths

Günter Oetter

Markus Hansch

Guenter Oetter

Thomas Ostrowski

Peter Deglmann

Stephan Freyer

Ashok Kumar Mishra

Horst Weiss

Rajan Hollmann

Ulrich Annen

Vandana Kurkal-Siebert

Markus Klumpe

Lorenz Siggel

Kathrin Cohen

Julia Kristiane Schmidt

Nicole Meier

Tobias Käppler

Bernd Leonhardt

Björn Heinz

Tillmann Faust

Foppe Visser

Prapas Lohateeraparp

Michael Bueschel

Gabriela Alvarez Juergenson

Frank Heilmann

Ravindra Aglave

Clara Maria Hernandez Morales

Thomas Altmann

Sebastian Briechle

Tobias Kappler

Bjoern Heinz

The invention relates to a process for mineral oil production, in which an aqueous saline surfactant formulation comprising a surfactant mixture of at least one anionic surfactant of the general formula R&#x2014;O&#x2014;(CHC(CH)HO)&#x2014;(CHCHO)&#x2014;SOM and at least one anionic surfactant of the general formula R&#x2014;O&#x2014;(CHCHO)&#x2014;SOM and a base is injected through injection boreholes into a mineral oil deposit, and crude oil is withdrawn from the deposit through production boreholes. The invention further relates to the surfactant mixture, a concentrate comprising the surfactant mixture and a manufacturing process as well as the use of the surfactant mixture and the con- centrate in the production of mineral oil from underground mineral oil deposits.

Robust alkyl ether sulfate mixture for enhanced oil recovery

The present invention relates to water-soluble hydrophobically associating copolymers which are obtained in the presence of a nonpolymerizable surface-active compound and which comprise novel hydrophobically associating monomers. The monomers comprise an ethylenically unsaturated group and a polyether block, the polyether block comprising a hydrophilic polyethyleneoxy block and a hydrophobic polyalkyleneoxy block consisting of alkyleneoxy units having at least 4 carbon atoms. The monomers may optionally have a terminal polyethyleneoxy block. The invention further relates to processes for preparing the copolymers and to the use thereof.

Water-soluble, hydrophobically associating copolymers having novel hydrophobically associating monomers

The present invention relates to a process for preparing hydrophobically associating macromonomers M and to the novel macromonomers prepared by means of the process according to the invention. The macromonomers M comprise a copolymerizable, ethylenically unsaturated group and a polyether structure in block form, the latter consisting of a polyethyleneoxy block and a hydrophobic polyalkyleneoxy block consisting of alkyleneoxy units having at least 4 carbon atoms. Optionally, the macromonomers M may have a terminal polyethyleneoxy block. The macromonomers prepared by the process according to the invention are suitable for reaction with further monomers, especially with acrylamide, to give a water-soluble, hydrophobically associating copolymer.

Process for preparing a macromonomer

A process for mineral oil production, in which an aqueous formulation comprising tris(2-hydroxyphenyl)methane of the general formula (I) is injected into a mineral oil deposit through an injection well and the crude oil is withdrawn from the deposit through a production well,  

Use of tris(2-hydroxyphenyl)methane derivatives for tertiary mineral oil production

A two-stage process for mineral oil production from mineral oil deposits with a deposit temperature of more than 70&#xb0; C. and a salinity of 20 000 ppm to 350 000 ppm, in which an aqueous formulation comprising at least one glucan with a &#x3b2;-1,3-glycosidically linked main chain, and side groups &#x3b2;-1,6-glycosidically bonded thereto and having a weight-average molecular weight Mof 1.5*10to 25*10g/mol, are injected into a mineral oil deposit through at least one injection borehole and crude oil is withdrawn from the deposit through at least one production borehole. The aqueous formulation is prepared in two stages, by first preparing an aqueous concentrate of the glucan, and diluting the concentrate on site with water to the use concentration.

Process for mineral oil production from mineral oil deposits with high deposit temperature

A process for mineral oil production, in which an aqueous formulation comprising at least one water-soluble, hydrophobically associating copolymer is injected through at least one injection borehole into a mineral oil deposit, and crude oil is withdrawn from the deposit having a deposit temperature of 35&#xb0; C. to 120&#xb0; C., preferably 40&#xb0; C. to 90&#xb0; C., through at least one production borehole, wherein the water-soluble, hydrophobically associating copolymer comprises at least acrylamide or derivatives thereof, a monoethylenically unsaturated monomer having anionic groups and a monoethylenically unsaturated monomer which can bring about the association of the copolymer.

Process for mineral oil production using hydrophobically associating copolymers

Growing community of inventors

Hamburg, Germany

Benjamin Wenzke