Wintershall Holding Gmbh

Elektro-thermit Gmbh & Co. Kg

Institute of Petroleum Chemistry of the Siberian Branch of the Russian Academy of Sciences

Institute of Petroleum Chemistry of the Siberian Branch of the Russian Academy

Wintershall Dea Gmbh

Konrad Siemer

Vladimir Stehle

Liubov Altunina

Vladimir A Kuvshinov

Ivan Kuvshinov

Jan Hantusch

Werner Angenendt

Volker Riha

Dmitry Kuznetsov

Vladimir Kuvshinov

A process for producing mineral oil from mineral oil deposits, in which the mineral oil yield is increased by blocking highly permeable regions of the mineral oil formation by separate injection of at least one acidic formulation which comprises water-soluble Al(III) salts, and one urea- or urea derivative-comprising formulation into the deposit, said formulations not mixing with one another until within the deposit, and the mixture forming highly viscous gels under the influence of the deposit temperature. The process can be used especially in the final stage of deposit development, when watering out in production increases, and particularly after the steam flooding of the deposits.

Process for producing mineral oil from underground mineral oil deposits

The invention relates to a heat generator for well stimulation, comprising a tubular fuel vessel () with two or more mutually separated, closed segments () arranged in longitudinal succession and each at least partly filled with fuel (), and at least one igniter () for ignition of the fuel in at least one of the segments (), wherein the ends of the segments are connected such that the fuel in a subsequent segment is ignitable owing to the evolution of heat in the course of burnoff of the fuel in a preceding segment. The invention further relates to a process for well stimulation using an inventive heat generator.

Device and method for well stimulation

Mineral oil is produced from underground mineral oil deposits by injecting one or more flooding media into an injection well and withdrawing mineral oil from a production well. Highly permeable zones are blocked in the region between the injection well and the production well by separately injecting, in succession, two different aqueous formulations, one having water and urotropin and the other having water and urea, through the injection well into the deposit. The two different aqueous formulations mix in the formation after injection to form viscous gels. Either or both formulations have at least one further metal or semimetal compound that can form gels when admixed with bases. The injection well temperature is not more than 60&#xb0; C.

Method of reducing zone permeability by in-situ formation gel of urotropin and urea in an aqueous solution

The present invention relates to a process for the production of mineral oil from mineral oil deposits with large temperature gradients, in which, for increasing the mineral oil yield, highly permeable regions of the mineral oil formation are blocked by injecting formulations which, after being forced into the deposit, form highly viscous gels under the influence of the deposit temperature. A plurality of portions of the formulation which in each case can form gels at different temperatures and therefore result in very complete blocking of highly permeable regions of the formation are used.

Process for the production of mineral oil

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Kassel, Germany

Konrad Siemer