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There have been considered the main ecological problems of Western Ukraine and changes of geological environment under the influence of oil and gas complexes functioning. Ecochemical investigations of the environment give us a possibility to reveal the areas with abnormal hydrocarbon concentration in the nearsurface layers and in ground waters. On the basis of the investigation results there have been worked out organizational, technological and environmental measures to eliminate pollution or to reduce its negative influence on geological environment. Western Ukraine is the region with the highly developed infrastructure of recovery, transportation, refining and consumption of oil, petroleum products and gas. There has been developed a big net of transit and local pipelines for oil and gas products, refineries, big stations for storage and refinery of oil, gas and their products. Due to this the geological environment on certain areas has a great ecological loading, the influence of which is frequently appeared as a result of systematic and emergency losses of oil and oil products. Their spreading and filtration through the aeration zone cause a complicated process of landscape pollution: superficial shutes, the upper zone of soil (including zone of saturated filtration and groundwaters), creating stable petrochemical pollution sources for the natural environment. The majority of the revealed pollution sources have a great number of oil products. The main sources of the long-lasting petrochemical pollution of the natural environment are the objects of the petrochemical complex (PCC), where annual losses of oil and oil products caused by different emergencies come to thousands of tons. Moreover there can be observed a tendency of increasing the number of emergencies and losses of oil and oil products due to complex influence of technogenous (man-caused) disturbances of the engineeringhydro-geological conditions (activation of exogenous geological processes) and equipment wearability. The number of oil products, that are annually carried out from the pollution sources by superficial water, is more than thousands tons. The systematic losses are also spread at the objects of petrochemical complex. As a rule they are prolonged, dimensioned as to their development and assessment and create conditions for the objectionable geological consequences, which exceed considerably the risk of disastrous effects. They namely determine the permanent existence of sources of petrochemical pollution of soil and * Ivano-Frankivsk National Technical University of Oil and Gas

Ecological safety of the Carpathian region as a process of oil and gas complexes functioning