The article is devoted to a comprehensive analysis of the geological structure of a complex oil reservoir located in the southeastern part of the Pannonian basin. The concept of the hydrocarbon traps formation is based on the connection with the deep processes of oil and gas formation and phenomena, which lead to the formation of cracks, faults, local positive structures in the interval from the foundation to the upper part of the sedimentary cover. The article shows the significance of deep faults in the basement during the formation of sedimentary cover structures. These processes result in a wide range of oil and gas potential of the Pannonian basin deposits. In studying the specifics of tectonic movements and the features of gravitational deposits (conglobreccia), a tectono-sedimentary approach has been developed that can reduce a number of methodological difficulties in creating geological models and concepts. Recommendations are given on the additional study of adjacent structures in order to detect hydrocarbon deposits on the slopes with protrusions of the crystalline basement. Characteristic features of the geological structure are the local volume of the identified oil and gas deposits, small foci of increased productivity and improved filtration properties of reservoirs. Such features of the uneven distribution of sites of different productivity have a significant impact on the success of prospecting and exploration, the effectiveness of development of oil and gas deposits.

Despite the fact that there is the large amount of accumulated factual material, formation of hydrogeochemical conditions of deep oil and gas horizons in the Middle Ob and the West Siberian megabasin still contains many questions. This is due to numerous hydrogeodynamic and hydrogeochemical anomalies that don't have an unambiguous explanation. The presence of inversion hydrogeochemical zoning in the Lower Cretaceous and Upper Jurassic deposits and the presence of low-mineralized reservoir water of a sodium-bicarbonate composition are the peculiarity of groundwater in the considered territory. A change in the genetic type of water, a decrease in mineralization, a decrease in the content of calcium ion, and an increase in the amount of bicarbonate ion in the Mesozoic hydrogeological basin are associated with the transformation of mineral and organic matter in sedimentary rocks, when they are immersed, at the water expelling stage. The determination of the origin of low-mineralized reservoir water of a sodium-bicarbonate lying at significant depths is of great practical importance, since the relationship between the inversion of groundwater and oil content has been revealed, so this fact can be considered a search criterion for petroleum potential.

Despite the current political and economic situation in Russia, mining in small oil fields is important and topical issue. We have conducted a geological and field analysis of the development of one of such small oil fields from setting into operation to shut down and have identified the reasons for the low production of oil reserves and the failure to achieve the design oil recovery factor. At the same time, the field has sufficient reserves of recoverable reserves, and there is an available transport infrastructure, which proves the necessity to consider rerun it for the development. For this purpose, geological and technical actions have been developed and are being proposed for implementation to improve the efficiency of field development. These actions envisage implementation in two stages: the first with minimal costs and the second with higher costs. At the first stage, at the existing reservoir pressure, we recommend to perform forced fluid withdrawals with an increase in depression on the reservoir. At the second stage, we offer actions at a higher cost, such as hydraulic fracturing, sidetracking. As a result of the analysis, actions have been developed to increase selection from initial recoverable reserves and increase the economic efficiency when the field is rerun.

The article is devoted to an analysis of the oil well construction in the fields of the Talakan group of Eastern Siberia. The low quality of the construction of oil wells is explained based on geological structure of the reservoir and the conditions of its formation, particulary, the complications encountered during drilling are given. Based on the analysis, it was found that the use of traditional monosalt and salt-saturated drilling muds is not effective enough to simultaneously solve the problems of exposing intervals of salt deposits and high-quality primary exposing of reservoirs. Based on the literature data analysis and the experience of building the first exploratory wells in Eastern Siberia, the use of hydrocarbon-based flushing liquids is justified. As a result of theoretical and laboratory studies, the compositions of invert-emulsion drilling fluids are proposed of hydrocarbons, which are available in the conditions of fields in Eastern Siberia. The results of studies for determining the effect of flushing fluids on the reservoir properties of the V10 reservoir of the Vostochno-Alinskoye oil and gas condensate field showed that recovery of core permeability after exposure to hydrocarbon-based flushing liquid was on average 90 %, which is significantly higher compared to the effect of water-based drilling muds, where the recovery coefficient is 23 %.

In the article, we analyze types of drilling mud, which are used to drilling intervals of permafrost rocks; the importance of wellbore stability is noted. Wedescribethemain technologies, which have been being applied in the north of Western Siberia; these technologies are aimed at minimizing the loss wellbore stability due to violation of the temperature conditions in the well. We also analyze hydrocarbon systems, taking into account foreign experience, which is based on prospecting and exploratory drilling of ice deposits in Greenland and Antarctica. The article draws your attention to using synthetic fluids, monoesters and chladones. The difficulties of the existing technology and the disadvantages of the hydrocarbon systems are highlighted. We propose to apply a new cryogenic drilling technology, which consists in the use of synthetic fluorine-containing agents as flushing fluid at low temperatures. The text gives valuable information on composition of the proposed flushing fluid and the prospects of using the technology to prevent complications. Much attention is given to issue of manufacturing the main chemical reagent with the reduction of the generalized production chain of its production from the starting material, it is fluorspar.

The prospects for the development of the Azov-Black sea region of the Russian Federation are primarily related to the development of the deep-water part of the Black Sea. In general, the forecast hydrocarbon resources are estimated at 1,5-2,4 trillion m3 in gas equivalent. Ice loads are one of the most important factors determining the stress state of the entire stationary platform when developing and designing offshore structures for the gas field in the Sea of Azov. The author of the article proposes to install special structures, such as cone icebreaking devices, at the contact points. An analytical study of the stress state of ice-breaking devices is carried out on the basis of the general provisions of the theory of elasticity of thin plates. An expression defining the strength condition of the cone shell material is obtained. The device of the Ansys17.2 software complex was used to obtaining specific results of calculations of the stress state of the ice-breaking device. Improving the platform support post by installing cone structures reinforced with concrete in the contact zone results in the destruction of the ice field from bending rather than compression. In this case, the horizontal pressure of the ice on the support is reduced. As a result, the stress level in the elements of the offshore structure support post is reduced. Due to the three-axis compression of concrete, the stress decreased in the model reinforced metal shell by 3,7 times compared to the level of stress in similar elements of the base model, and 1,7 times compared to the model with metal stiffeners. Deformations of elements in the direction of force ice action decreased from 4 cm in the base model to 1 cm in the rib-reinforced model of the ice-breaking device, i.e. by 4 times, and to 0,2 cm in the model reinforced with concrete, i.e. by 20 times. The use of composite construction leads to an increase in the rigidity and strength of the structure to protect offshore structure from the effects of ice.

The article deals with innovative technologies for the development and research of oil and gas wells by jet devices in various conditions of occurrence of productive formations. Data are given about the results of work with jet pumps for intensifying the inflows in fields of Western Siberia and about their efficiency to change well productivity. We show development potential of jet pumps and technology in the oil and gas industry to improve the quality of well construction and well operation. Attention is drawn to new technologies and designs of jet pumps, which have been developed for well development, research of two or more reservoirs with the aim of combining them into one production facility. The article gives valuable information on effective technical and technological solutions for well development and stimulation of inflows from reservoirs with abnormally high reservoir pressure. The use of this technique and technology in well development processes allows you to obtain enhanced information about the reservoir properties of productive formations, as well as to increase their productivity.

The article discusses the urgent problem of industrial methods for increasing the octane number that improve the quality of gasoline produced. These methods include the processes of catalytic reforming and compounding of gasoline. Reforming from "to reform" (English) — to remodel, to improve. Reformate, depending on the production technology and composition of the raw material, may contain up to 70 % of the mass. aromatic hydrocarbons. Attention to this problem is due to the tightening of environmental requirements for the quality of motor fuel that must comply with modern standards. An effective solution to this problem is to model refining processes with programming. In this article, we apply methods of correlation and regression analysis. Using these methods, you can establish the relationship between two or more variables, thus finding the most effective solution to both technological and economic issues.

The technology for pumping out and partial utilization of associated gas in oil fields by the vacuum method, using a unit for pumping gas from the annulus of the well and pumping it into the product collection system (KOGS), have been implemented at wells at the Zarechnoye field of Geotech JSC in the Republic of Tatarstan. These wells are operated by sucker rod units. The use of the KOGS unit allowed us to evaluate the effectiveness of the production system under consideration Experimental studies have shown that a decrease in annular pressure causes a significant increase in the dynamic level and an improvement in the conditions of oil inflow to the well. The operation of sucker rod units in such conditions provides an increase in the delivery and filling coefficients of the pump and, accordingly, an increase in oil production.

Separation technique and technology improving to increase well production fluids separation effect is an important issue in the field of petroleum production and treatment. Due to the change in the size of separator containers, the increase in the separation equipment productivity has reached its maximum capabilities, and subsequent work in this direction is difficult and unjustified. Studying the gas-liquid flows movement in the separator, the in-package and in-rotor flows impact, changes in package design, the process of the dispersed phase and the flotation effect destruction will allow us to create a technological and technical basis for separation equipment performance ensuring in the future. Because of the study, the design of the apparatus with the best well production fluids separation was pro-posed, the use of which ensures the separation and dense fraction removal the through the discharge opening efficiency. Based on the presented research, a prototype apparatus was developed and machined.

The article discusses the issues of risk management in the road transport of petroleum product. We analyze the main risk assessment methodologies; propose to use the hierarchy analysis method to improve quantitative risk assess ment. The identification and assessment of risks are one of the key points in the development of preventive measures to reduce accidents. The use of traditional methods for risk analysis and assessment has a drawback in that they don't imply the possibility of ranking risk assessment criteria by importance depending on the specifics of the task being solved. Because of the fact that calculations are in relative units, the issue of ranking risks to critical, significant and insignificant is solved automatically.