DOI: 10.24411/2076-6785-2019-10066
Abstract
The article deals with: the problems arising in the dri lling intervals of the wellbore, consisting of clay rocks, prone to hydration and collapse; the mechanism of swelling of clay rocks, the process of inhibition of clays; aspects of the use of clay inhibitors; some clay inhibitors, positively proven in laboratory tests and/or in the pr actice of drilling oil wells;
briefly presents the results of laboratory tests for the prevention of swelling of clay rocks under the influence of water dispersion medium..
Materials and methods
Laboratory studies are directed at finding the maximum ways to protect the core material of clay rocks from hydration, by selecting effective clay inhibitors. In the course of laboratory studies of the core material, observations were made of the effect of various dispersion media on clay rock, by immersing the core segment in the dispersion medium for 24 hours,
at rest (without mechanical mixing) in comparison with the source material, that is, the core not subjected to wetting by the dispersion medium.
Keywords
drilling of wells, hydration of clay rocks, clay inhibition, inhibitors clays, formation of cavities, formation clay balling
