Siberian Federal University

The study is devoted to conducting comprehensive studies of the rheological and elastic properties of emulsion drilling fluids based on technical vegetable oil with an oil/water ratio of 70/30. The resulting solutions were compared with oik-based drilling fluids developed according to the same recipe. Technical oils of rapeseed, flax and camelina plants, diesel fuel and synthetic hydrocarbon oil were considered as a dispersed medium. Additionally, the rheology and microrheology of drilling fluids were analyzed after thermal destruction tests at 150 °C. It has been shown that drilling fluids based on plant oils are not inferior in their properties, and in some parameters even superior to oil-based drilling fluids. This opens up broad prospects for the use of plant oils as a replacement for existing oil- based drilling fluids