An important condition for the successful operation of an oil production enterprise is the provision of a given level of oil production and its preparation in accordance with the current regulations. Among the quality indicators of commercial oil, special attention is required to control the content of volatile organochlorine compounds (OCC) in the fraction boiling up to a temperature of 204 ° C (GOST R 51858-2002), since the technological design of oil treatment facilities does not allow cleaning oil from OCC in case their concentration exceeds over regulated values. This paper presents the experience of organizing control over the change in the concentration of OCC in well products and commercial oils on the example of one of the large field oil treatment facilities of JSC Samaraneftegas. It is shown that the concentration of OCC in commercial oil depends on the content of natural organochlorine compounds, geological and technical measures and the use of oilfield reagents. Information on the background content of natural (native) OCC in well production is presented. The average content of native OCC in oil for the studied objects is 1.1 ppm, among which the presence of high molecular weight chlorine-substituted paraffinic hydrocarbons of linear or weakly branched structure with boiling points above 204 °C is recorded. The results of the field assessment of the impact of some types of geological and technical measures on the dynamics of changes in forestry and chemical treatment are presented. Preliminary results showed that geological and technical measures lead to an increase in the content of OCC in the well production, but not higher than the regulated values. The results of the studies (taking into account the continuation of the accumulation of statistical information) can be the basis for predicting changes in forest chemical treatment facilities for oil treatment facilities (nodal mixing points), determining the most "problematic" areas, adjusting geological and technical measure plans in order to ensure control of the forest chemical treatment plant content and exclude situations leading to an increase in their concentration in commercial oil.
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