The theoretical, experimental and operational foundations related to the development of the Gel-Int™ thermal insulator are presented. This thermal insulator is a product patented by INTEVEP,S.A and is employed as an insulating medium in the cyclic steam injection process, in oil-producing wells.

The activities carried out, included the experimental evaluation of different insulating mixtures and the performance of field tests. As a part of the experimental development 19 insulating mixtures were evaluated in test cells, including a commercial brand mixture a widely used. During the experimental evaluation, the insulating mixtures were studied from the thermal and rheological behavior point of view.

The experimental activities concluded with the formulation of the Gel-Int™ thermal insulator. Subsequently, a field evaluation of this formulation confirmed, under real steam injection conditions, the thermal and rheological properties experimentally established.

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