Complex ecological monitoring of negative impact of oil-containing waste in areas of oil fields as an object of ecological risk

Abstract

In this paper peculiarities of negative impact of oil-containing waste to humans and biosphere and approaches to its estimation are considered. For the estimation of ecological risks of negative impact of oil-containing waste in areas of oil and gas fields it is suggested to take into account not only its toxicological and quantitative characteristics, but also the degradation of the territories of fields, potential recultivating capacity of fields, suitability of wastes for utilization etc. Negative ecological impact not only from operation but also from mothballed oil well should be investigated. Results of complex experimental researches of negative impact of oil-containing waste in regions of development and exploitation of oil and gas fields are described. In number of cases increased values of oil containing waste and heavy metals were determined in soil and in water environment. For oil wells of Mogutovskoye field acute toxicity of soil samples near to the wells and excess over maximum permissible concentrations of methane were determined. Results of monitoring of toxicological impact of oil containing waste in areas of different oil fields of Samara region and in oil treatment plants by using of biological testing methods have showed that a number of samples have enlarged toxicity and are causing acute toxic effect to the test-organisms – green algae Chlorella vulgaris Beijer and Scenedesmus quadricauda (Turpin) Brébisson, crustaceans Daphnia magna Straus. In number of cases increased values of oil products was observed. Thus, it was determined that negative impact of oil-containing waste in areas of oil fields is complex in nature and may cause significant ecological risks for air, water and soil. Results of work allow us to carry out more efficient and high quality monitoring of negative impact of oil-containing waste and estimation of ecological risks as well as to develop the measures for reduction of negative impact of oil-containing waste.