Hloba R. Assessment of the geological environment impact on the stability of natural-technical pipeline transportation systems (based on electrometric methods).

Ukraine's Pipeline Transportation System is the fifth longest in the world after the United States, Russia, Canada and China and extends for 45,000 km. This type of transport is the most economical and efficient for the transportation of liquid fuel, domestic and process gas, petrochemical products. However, the unsatisfactory condition of pipelines leads to their depressurization and is accompanied by spillage and penetration of petroleum products into the soil, pollution of surface and ground waters. The main reasons for this are damages of insulating covering and lack of proper active protection against electrochemical corrosion. All uppermentioned problems requires more careful monitoring of the technical condition of these facilities, their current and major repairs, increasing the responsibility of economic entities for the maintenance of the gas supply system, oil and petroleum products pipelines in good technical condition. The most common environment for laying main pipelines are soils. Soils contain moisture which is soil electrolyte. Accordingly, the mechanism of main pipelines corrosion refers to electrochemical corrosion. Soil electrolyte contained in its pores "permeates" the soil. Thus, the corrosion of pipelines is significantly affected by soil moisture. Corrosion of pipelines is significantly affected by electrical conductivity, or electrical resistivity of soils. The thesis is devoted to the use of an effective and rational set of electrometry methods in investigation the influence of the geological environment on the pipeline transportation system of Ukraine, in particular modern researches were performed by different methods: vertical electric sounding, measurements of the transverse "potential gradient" of the electric field, symmetrical electric rofiling.