Oil-bearing objects on the south-eastern slope of the Anabar anteclise

The article raises the question of the expediency of studying the possibilities of developing heavy oils and bitumen in the upper part of the section in the northwest of the Republic of Sakha (Yakutia). The Siligir-Markhinsky bitumen field is identified as the most promising object byabundance of manifestations and geographical location. Brief information is given on the lithological and stratigraphic section and the main tectonic elements of the study area. Anomalous thickness of the section with negative temperature (up to 1450 m) is indicated as a distinctive feature of the studied territory. The features of the distribution of epigenetic oil and bitumen occurrences along the section and the influence of hypergenesis processes on the individual and group composition of oils and bitumen are presented in detail. It is concluded that the most studied and attractive object for the extraction of heavy oils, malts and asphalts are the rocks of the Markhinskaya and Morkokinskaya suites in the immediate vicinity of the Udachnaya kimberlite pipe. Physicochemical characteristics of oil sand bitumens are given, indicating their mobilityin the temperature conditions of the upper part of the section of the region under consideration. It is proposed to use horizontal drilling in combination with multiplicative petrofracturing for the development of oils and bitumens of the Siligir-Markhinsky field. Direct signs of oil and gas contentestablished during testing of exploration well No. 2-P drilled in non-structural conditions are presented. A possible reason for the failure to obtain oil and gas inflows is the poor quality of the opening of productive layers. It is concluded that the prospects for oil and gas content of the Markhinsky arch along the lower part of the section are preserved, taking into account the placement of the exploratory well in non-structural conditions and limited experience in opening oilbearing strata. It is noted that the necessity of monitoring the stability of gas flow rate with an increased hydrogen content in the area of the Udachnaya pipe to study the possibilities of hydrogen production