As the title implies the article considers groundwater, which is contained in the Aptian-Albian-Cenomanian hydrogeological complex. This complex plays an important role in oil and gas field development in Yamalo-Nenets oil and gas producing region. The text gives valuable information on a description of the complex in the regional plan, its lithological characteristics, hydrogeological parameters, water analysis, geotemperature component and environmental aspects. The studied groundwater is used for technical purposes for the flooding system, and the complex itself is a collector for burial of wastewater into the subsoil. The conducted studies on the territory of the region prove the prospects of using water for the flooding system. Moreover, aquifer is widely used for wastewater disposal. That is why it is necessary to rationally use the underground storage in order to avoid the penetration of pollutants into groundwater.

Many fields in the northeastern part of Surgut oil and gas region were discovered in 1960s-1970s. Currently, because to the development of reserves of large deposits of simple structure the restoration of the resource base and maintenance of the production level of oil and gas producing organizations are the main tasks. Its implementation is possible due to the development of new territories, increasing the depth of prospecting drilling, additional exploration of deposits of complex structure.
Residual reserves of deposits in the studied area are confined to Achimov sequence and reservoirs in anomalous section of the Bazhenov formation.
The article considers the types of deposits in Achimov sequence with normal and anomalous structure of Bazhenov formation. The author proposes a classification of oil deposits in the fondoform part of clinoforms. This classification clearly shows the possible relationship between Achimov sequence and the underlying bituminous deposits of Bazhenov formation.
Some deposits associated with reservoirs in anomalous section of the Bazhenov formation may be missed targets; therefore, additional exploration is required. Since the reservoirs of Achimov sequence and anomalous section of the Bazhenov formation have different properties, it is necessary to differentiate them when planning geological and technological measures to extract oil.

Heterogeneous rocks are among the most difficult objects to study reservoir properties. In order to study in detail the methods of research and model such reservoirs, a characteristic of the state was reduced and an analysis was carried out the methodological support for the study of textural heterogeneous rocks according to well logging data. In this article, both fundamental approaches to modeling textured heterogeneous rocks and concepts that haven't become widespread among specialists are considered. After analyzing the existing approaches to the study and modeling of textured heterogeneous rocks, based on geological classifications, in particular the works of L. N. Botvinkina, we have instilled in the type of work the classification of such rocks by heterogeneity. In addition, in most cases textural heterogeneity is considered as the form of true layering, objects at the moment are studying by layered rocks, rocks can haven't only oblique, wavy, complex texture, etc. Therefore, the classification approach to the study and modeling of objects, the allocation of such rocks to structure will allow exploring textural heterogeneous rocks.

The article implements an approach of step-by-step lithological dissection of the section of volcanogenic sedimentary rocks of the Sredne-Nazymskoye field using comparisons of methods of geophysical surveys of rocks at the qualitative and quantitative level.
The predominantly acidic composition of the rocks determines the use of unified petrophysical algorithms for the section of the Pre-Jurassic complex with additional division into enlarged groups of lithotypes: lavobreccia, tuffs and unchanged effusions. An important factor influencing the interpretation of geophysical surveys is the presence of rock fracturing in the Pre-Jurassic complex interval.
The assessment of the possibility of lithological dissection of the section, taking into account the additional division of rocks into collector-non-collector, which allows us to identify promising zones of development of pore and fractured reservoirs.
We propose an approach of step-by-step lithological dissection of the section, including qualitative and quantitative criteria, which ensures the improvement of existing technologies.

These days special oil pipelines, which are made with the conesocket connection technology, are widely used. However, it is still not clear how these pipelines react under the influence of forces. Also, there is no data, which could be used to estimate the possibility of pipeline usage after the impact of these forces. The main idea of this article is to find such limit displacements from the pipeline zero position, which would ensure the possibility of the pipeline usage in future. In such case this article uses the methods for finding the equivalent model of the conesocket connection and estimating the values of contact stresses. The result described in the article provides limit transverse displacements data by the number of the linked joints, which ensure the possibility of the pipeline usage in future, if they are not reached during the operation. The results provided in this article will enable to estimate the oil pipeline performance, repair and replacement.

This article deals with the main trends of improving the energy efficiency of production facilities for processing hydrocarbon materials on the example of a catalytic reforming unit. By analyzing the heat-technological scheme of the hydrotreatment section, the potential for energy saving has been identified and options for upgrading the heat exchange system of the stabilization unit to increase the use of secondary energy resources and minimize heat losses have been proposed. Based on thermal and economic calculations, a more efficient option has been chosen with an arrangement of multistage heat exchange and use of distillate product for preheating raw materials, which allows more fully using the potential of its own streams. The proposed optimization of the heat exchange system of the stabilization unit of the hydrotreating plant by involving the distillate product in the heat exchange will provide an increase in the degree of heat recovery with a reduction in heat losses and electricity consumption, a reduction in the number of heat exchange equipment units and a more rational use of them.

Development of fields at a late or final stage of exploitation of the Ural-Volga region is carried out mainly with the use of downhole sucker rod pumping units. The most typical failures for these installations are rods breaks and breaks and pump valve malfunctions. Methods for eliminating these accidents vary significantly: a break or a breakaway of the rods involves lifting the downhole equipment, and the "sticking" of the shut-off element of the pump valve assembly is eliminated by the "resuscitation" of the downhole equipment (flushing with water, hot oil or solvent). An error in recognizing a malfunction leads to incorrect planning of work to restore the operability of downhole equipment, and, as a result, to economic losses.
The cause of the downhole equipment malfunctions of the sucker rod pumping units is usually determined by analyzing the dynamogram. However, in many cases dynamometer charts don't distinguish between the bottom flap of the rods and the failure of the sucker rod pump valves. In the article, a method of prompt determination of rod breakage and breakaway in a well is considered, which consists in creating an electrical circuit "rod string - tubing string" and monitoring its integrity. To determine the type of malfunction, the synchronization unit via the electromagnetic channel measures the resistance of the system on the dielectric insert. In case of break-off of rods, the electrical resistance of the "tubing-pump-rod string" circuit will be much higher (more than 2 ohms) than in the absence of this failure (0...2 ohms).