THE DRILLING SOLUTION COMPONENTS’ IMPACT ON THE ENVIRONMENT AND DIRECTIONS OF ITS REDUCTION

Анотація

The problem of the oil wells operation influence on the environmental ecological state is considered. The technical and biological aspects of the impact of drilling solution components used in the process of oil production on the biotic and abiotic environment are analyzed. The methods of preserving the cleanliness of reservoirs and soil during the wells operations and preventing pollutants from entering the environment are described. Possible effects of the toxic compounds of the drilling fluid on living organisms, in particular plants, have been identified. The components of drilling fluids of different types are characterized by different levels of environmental hazard. The lowest level of threat to environmental safety is inherent in the clay type of solution, and the polymer-potassium solution is characterized by the highest potentially dangerous impact on the biota. Despite belonging to the third class of moderately hazardous substances, sodium salts, calcium and chlorides, as components of drilling fluids, have the highest destructive effects on the environment. Soil salinization has the most detrimental effect on plants, as it breaks the osmotic equilibrium in the soilplant system, disrupts the transport of organogenic elements throughout the plant, and reduces the availability of moisture and minerals. Increasing soil pH due to the ingress of calcium and sodium hydroxides as components of drilling fluids adversely affects plant growth and development. Stability of some groups of plants to the influence of components of drilling fluids and ability of phytoobjects to resist stress influence are noted. Halophytes are well adapted to the growth in conditions of excessive soil salinization due to the specific metabolic and structural features of the organization. Low oil content in drilling fluids can be released into the environment and, when accumulated in the aquatic and soil environments, lead to a number of destructive processes in living systems. Plants sensitive to oil pollution respond by reducing growth processes, increasing catabolic processes, and reducing assimilation function. In order to minimize the negative impact of chemicals on the environment of oil production territories, it is necessary to apply a comprehensive approach that combines the technical aspects of pollution control with effective biological methods. The urgent task of
modern environmental science is to search for oil-resistant plant species that are effectively capable of converting toxic petroleum products to biota-safe compounds. Technological recommendations for the prevention of environmental pollution by drilling fluids are proposed, as well as phytorecultivation methods for controlling already polluted ecosystems.