Sequence stratigraphic method allowed us to divide the Middle Ordovician-Lower Devonian oil-and-gas bearing complex of the Timan-Pechora province into 10 sedimentary sequences of 3rd order, lasting from 4 to 10 million years. The lithofacial zones location predicted on the basis of the sequential stratigraphic method and analysis of their reservoir potential allows us to determine the distribution patterns of reservoir, screen and oil-bearing strata in the section and perform their mapping. Application of the given technique has allowed to allocate the area with probable concentration of hydrocarbon raw materials in the organogenic structures of the middle Ordovician and lower Devonian in the Timan-Pechoro-Barents Sea paleobasin. The uniqueness of the development is related to the prediction of zones with reservoir properties on the Arctic shelf of Russia, where giant deposits of oil, gas and gas condensate have been discovered, which allows us to model the process of trap formation and limit the exploration areas in the near future on the northern borders of the country.
The problem of improving the efficiency of domestic oil companies in the exploration of complex fields, sinking wells in difficult conditions and reducing the material and time costs by reducing the accident rate of drilling oil and gas wells is considered. Relying on experience of leading operators of oil and gas service companies, developed countries in the last 10 years have managed to reduce costs for drilling wells of complicated designs and trajectories. It was achieved due to competent work organization and effective system of improving the quality of drilling by preventing well construction accidents. The project of structural reorganization of subdivisions when drilling particularly complex and costly wells was proposed. The created system will allow efficient use of material and labor resources with simultaneous improvement of professional training of engineering and service personnel.
The introduction of new methods of predicting and preventing complications and accidents during drilling has allowed Western oil companies to save large material and human resources. In our country, little attention was paid to this issue, while increasing the importance of the human factor to the level adopted in Western European countries will allow a more competent and optimal use of resources. High complexity of diagnostics of complications and accidents while drilling wells in complicated conditions requires complex and expensive measuring base, maintenance of which requires highly qualified specialists, psychologically stable, able to make decisions under heavy loads, physical and moral. The most effective use of such specialists will be in conditions of structural reorganization of oil and gas production and processing divisions, which have remained unchanged since the times of planned economy, which in conditions of a sharp fall in oil prices negatively affects the financial well-being of companies.
The primary results of the research and engineering work of the Department of Technology and Technique of Well Drilling, carried out and completed in 2000, are presented. The main result of drilling long wells in the ice of Antarctica is the development of the project of environmentally safe opening of the subglacial Lake Vostok, a unique natural phenomenon, the complex study of which is of the greatest interest to the world scientific community. A 505 m long well with full core recovery was drilled on the Academy of Sciences glacier (Severnaya Zemlya archipelago) in the framework of the international environmental program PEGAIS. Geophysical measurements were carried out in the well. A new method of tubeless casing and sealing of anomalous intervals using a fusible binding material and a thermal plugging penetrator was developed. Basic theoretical and technological principles of liquidation plugging of hydrogeological wells with the use of economical and environmentally safe cementing mortar based on cheap mineral waste were developed. Effectively conducted research and experimental developments on the combined heat and hydrodynamic effects on low-productive sands to increase oil and gas production wells, clarified the laws of the hydro and foam core. New applied programs for PC were formed, allowing to increase adequacy of data and to expand the field of application in evaluation of regulation and stabilization of circulation and heat exchange processes during well sinking and development.
