Eni S.p.a.

Enitecnologie S.p.a.

Enitechnologie S.p.a.

Giuseppe Maddinelli

Thomas Paul Lockhart

Maria Andrei

Luisa Chiappa

Giovanni Burrafato

Stefano Carminati

Davide Moscatelli

Silvia Pavoni

Mattia Sponchioni

A fluid for controlling the permeability of a subterranean formation having an aqueous solution of at least one thermo-responsive polymer with block structure A-B-A', wherein At least one of the repeat units has a solubility of the corresponding monomer, in water at 20° C., equal to or greater than 120 g/l, and n is a whole number within the range 30-1000. The fluid is also used in a method for controlling the permeability of a subterranean formation.

Fluid for controlling the permeability of a subterranean formation, and use thereof

A method for predicting the properties of crude oils by the application of neural networks articulated in phases and characterized by determining the TNMR relaxation curve of an unknown crude oil and converting it to a logarithmic relaxation curve; selecting the values of the logarithmic relaxation curve lying on a characterization grid; entering the selected values as input data for a multilayer neural network of the back propagation type, trained and optimized by means of genetic algorithms; predicting, by means of the trained and optimized neural network, the physico-chemical factors of the unknown crude oil. The method comprises a training and optimization process of the multilayer neural network of the back propagation type. The method thus defined allows the most representative physico-chemical factors of crude oils to be predicted rapidly and without onerous laboratory structures, or alternatively the distillation curve of crude oils with an acceptable approximation degree.

Method for predicting the properties of crude oils by the application of neural networks

A process is described for reducing the production of water in oil wells which comprises the injection into the formation around the well of an aqueous solution of one or more polymers selected from those having general formula (I), wherein: n ranges from 0.70 to 0.98; m ranges from 0.30 to 0.02; n+m=1; Xand X, the same or different, are selected from H and CH; R, R, R, the same or different, are selected from C&#x2013;Cmonofunctional hydrocarbyl groups; and x ranges from 2 to 5.

Process for reducing the production of water in oil wells

A process is described for reducing the production of water in oil wells, with temperatures of up to (90&#xb0; C.), which comprises the injection in the formation around the well of an aqueous solution of one or more polymers selected from those having general formula (I) wherein: n ranges from (0.40) to (0.70), preferably from (0.5) to (0.65); m ranges from (0.15) to (0.65), preferably from (0.3) to (0.5); p ranges from (0.02) to (0.20), preferably from (0.05) to (0.10); n+m+p=1; xis selected from H and CH; R, Rthe same or different, are selected from C&#x2013;Cmonofunctional hydrocarbyl groups

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Milan, Italy

Giuseppe Maddinelli