Oil and gas producing enterprises at all stages of the life cycle have a negative impact on the components of the natural environment: atmosphere, soil, surface water bodies and groundwater. One of the serious environmental problems is the formation of drilling sludge during the construction of wells for oil and gas production. Some enterprises have debts on illiquid sludge barns. One of the reasons for this state of affairs is the shortcomings in the calculation of the actual volumes of sludge formed during drilling. The analysis of the existing methods for calculating drilling waste, literature sources and available materials for calculating the volume of drilling mud has revealed certain inaccuracies (errors) in calculating the volume of drilling mud and some unaccounted factors associated with the operation of drilling tools. A computational experiment was carried out and, using the example of one of the oil and gas producing enterprises, a comparison of the volumes of drilling sludge was made, taking into account possible errors, and a discrepancy of 181 m3 of drilling sludge per well was revealed. The elimination of errors in the calculation of waste generation standards and limits on their placement during the construction of wells will allow to adjust the volume of drilling waste generated and prevent the occurrence of possible environmental problems at the sites of well construction.
Agricultural activity is highly developed in the Krasnodar Territory, agricultural lands occupy more than 60% of its area. There is a risk of human health effects when eating agricultural products grown on soils contaminated with pesticides. Environmental problems caused by the contamination of agricultural soils of the region with pesticides determine its environmental safety and are very relevant. In the Russian Federation, many years of research are being conducted on soil contamination with pesticides in various regions. The annual reports contain data on the surveyed territories and survey areas, on the average and maximum concentrations of various pesticides, and on the types of pesticides. This study is devoted to the analysis of officially published data on soil pollution of the Krasnodar Territory in order to evaluate statistical data, identify trends in pollution changes in the field of observation and the possibility of forecasting. As a result of the conducted research, certain shortcomings were identified in the presentation of information on soil contamination with pesticides in the Krasnodar Territory, the trend of changes in soil contamination with pesticides was revealed and a forecast was made for some substances.
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