The article gives a brief overview of theoretical and practical aspects of shear wave seismic exploration, as well as main geological problems that are solved at stages of additional and further exploration of hydrocarbon deposits. Despite the theoretical basis developed back in the 19th century, the practical implementation of processing and interpretation of multiwave seismic data has not yet been included in the traditional graph of deskwork. Geological problems that can be solved with the use of shear wave data are relevant and extremely complex for traditional 2D / 3D seismic exploration. Shear waves provide more reliable information about structural and tectonic features in areas under the "gas clouds" or anomalous objects, leading to a complete lack of information below them in the data of traditional seismic. A quantitative interpretation of the v_P/v_S ratio allows one to make predictions of the reservoir properties and lithology. Reliable sorting of bright spot anomalies caused by the presence of hydrocarbons in the reservoir or lithological substitution is possible. The anisotropy of shear wave velocities observed with birefringence effects is the basis for predicting fracture intensity and direction.

Geological chance of success (gCoS) is one of the most important parameters affecting the efficiency of the exploration project. the article the features of the methodology for evaluating gCoS indicator have been analyzed. On a case study authors show that even insignificant change one of the risk factors can change the Expected Monetary Value (EMV) of the project by almost 100%.
To improve the accuracy of estimates of exploration investment projects, the gCoS assessment methodology needs further development, in particular, clarification of risk matrices for all factors on basis of growing statistics; development of tools for analyzing the confirmability of the gCoS forecast by region; distribution of regional criteria for geological success, etc. An actual task is to develop an IT-solution for rapid analysis of the economic efficiency of the project and assessment of its sensitivity to geological uncertainties.
Apart from the technological effect, such an IT solution will be able to increase the level of competence of geologists engaged in the analysis of geological uncertainties and risks that is very important for a balanced assessment of projects.

Reliable seismic facies and petrofacial models are a tool for removing uncertainties in the construction of a 3D geological model of a reservoir. In recent years, Gazprom Neft PJSC has confirmed the high efficiency of petrofacial modeling. Owing to the developed technology, the informativity of the complex of geophysical research of wells has increased significantly. A wide range of geological and petrophysical information allows to create a more detailed geological model of the field and reasonably develop optimal solutions for the development of productive hydrocarbon deposits. The success of petrofacial modeling and providing a well log interpretation methodology depends on the presence of a relationship between reservoir properties of the unit and depositional environments. To reduce uncertainties in the assessment of reservoirs, it is necessary to refine the existing ideas about the geological and facies architecture of oil-field. The refinement of the lithofacies reservoir model based on new data helps to localize the position of sand bodies with improved filtration and reservoir properties of the rocks.

Assessment of potential reserves when planning exploration wells is carried out under conditions of great uncertainty and high risks. In the SPE-PRMS system, the difference between uncertainties and risks is very well shown. This system requests rather strict requirements for accounting for uncertainty. The PRMS system contains various approaches to reserves assessment: The deterministic method – is the main one in the examination of reserves. The probabilistic method is the most suitable when evaluating HC in the early stages of project implementation. The use of several types of assessment in the aggregate helps to increase the accuracy of the assessment and reduce geological risks. In order to improve the accuracy of reserves estimation in the planning of exploration, it is proposed to combine the deterministic and probabilistic methods. The combination of these two methods will provide an opportunity to ensure mutual verification of the reliability of the estimates and get a better estimate of the trap reserves.

Current work is dedicated lo litho-petrophysical clustering method, which can be useful for carbonate reservoirs. Methodology updates the standard well log interpretation with information about the rock fabric. After the implementation in 3D geological model the results of algorithm application will provide more correct estimation of perspective drilling zones.

The results of long-term Gazprom-Neft well-test and PLT remote monitoring downhole system development and implementation are gathered in the paper. Implementation dynamics of single-gauges and distributed gauges elements (stationary monitoring system) on the Gazprom-Neft oilfields is discussed; cost-effectiveness calculations of such usage are set. Novelty and complexity is proved by the analysis of author’s patents and further intellectual activity results.

Reliable forecast of fracture propagation during hydraulic fracturing operations in complex reservoirs rocks is a complicated task. It is tightly coupled to studying their mechanical parameters, microstructure at various scales and elastic strength characteristics of rocks. The objective of this work is to investigate and evaluate the mechanical parameters and boundary conditions of the studied intervals at microscale that need to be created in unconventional rock reservoirs to obtain an extensive network of non-main fractures. This allows to increase the efficiency of reservoir stimulation of unconventional hydrocarbon fields and maximize production from non-connected previously pores. To achieve the denoted goal, the authors propose the method which contains the following workflow: building a dataset containing petrophysical, geomechanical and mineral data, preparation and initialization of 2D and 3D microscale digital rock models and numerical simulations of their stress-strain states and fracture propagation in them. In this work, authors conduct a set of experimental investigations of mechanical parameters of rock samples, CT before and after the formation of fractures, QEMSCAN and mineral composition of rocks. Next step was the multimodal segmentation and registration of 2D QEMSCAN and 3D X-ray micro-CT data to develop a workflow for constructing 3D mineral digital rock models. Finally, a grid was built on a 3D digital model of segmented rock and loaded into a mechanical simulator where the rock matrix was assigned the appropriate mechanical properties. As a result of numerical simulations, stress-strain state for different loading conditions were obtained and the conditions under which the highest fracture formation occurs were chosen. The example of using the proposed workflow is based on the results of the study Russian most promising unconventional tight gas formation with pore space up to tens of nanometers.

Rocky formations are mostly used during construction of groundwork base and topping of automobile roads pavements. Rock materials are used both for formation of the mineral carcass in asphalt and cement concrete and for creation of pavement layers without processing with inorganic and organic binders. One of deterrents of arrangement of hydrocarbon sources in Siberia is absence of local constructional materials, especially rocks. Transportation of macadam for over 2000 km not only determines high price of such construction but is characterized with low reliability and durability. An option to replace rock materials is soil reinforced with inorganic binders. Necessity to use artificial rock materials that are based on reinforced soil is now explained by increasing volume of field roads, automobile roads and pads construction, especially in Western and Eastern Siberia. This paperwork covers the ways of acceleration and cost-cutting of the field arrangements basing on the use of new methods, developed within the last 30 years, to produce artificial rock materials basing on reinforcement of local soils and optimization of such rock materials.

Research, the results of which are presented in the article, are devoted to the detection of LHOS in naphtha and chemical reagents and are due to stricter requirements for the quality of marketable oil in accordance with the Technical Regulation of the Eurasian Economic Union On the Safety of Oil Prepared for Transportation and (or) TR EAEU 045/2017. The practical significance of the work is to reduce the risk of the formation of volatile organochlorine compounds in marketable oil due to the use of chemicals. As a result of the studies, the formation of volatile organochlorine compounds (the so-called secondary organochlorine compounds) was discovered due to the decomposition of salts of Quaternary ammonium bases contained in some oilfield chemicals.

The company is faced with the task of increasing the efficiency of capital projects, in particular, reducing the implementation time. To solve this problem, it was decided to make the valuation of construction by using aggregated unit rates. The article tells about a tool designed to automate the processes of forming and calculating the cost of construction at aggregated unit rates - software “C&M” (Calculation and Monitoring).

The purpose of creating the program of the automated workplace of a surveyor (AWS) was to automate the performance of surveying calculations and conduct surveying control in calculating the direction of drilling wells, project and actual inclinometers. Creation of a unified corporate database and calculation tools for surveying services of the company in accordance with accepted methodological documents. AWS automates all tasks related to manage locations of the well. The program allows to load the trajectory of wellbore, wellhead coordinates, project targets directly through interface forms and from .xls files. To upload the survey to the geodatabase, AWS uses data in the formats .lst, .xls, .grs, .las, .csv, .dev, etc. Calculations in the program allow solving a direct and reverse geodetic task. Calculation of magnetic declination at the wellhead is performed on the basis of the magnetic model IGRF. It is possible to work with various coordinate systems (geographic and projections) adopted by the company. The calculation of the coordinates of the axis of the wellbore is carried out on the basis of standard methods recommended in the industry normative documentation. Controlling user access to the service information can be performed both in the geodatabase and in the user interface. Verification at system login by user profile which consists of the access level and list of available fields. The system has a single data mart containing spatial and attributive information with access sharing by the AD user for the work of surveying services of various operators with the help of any thick clients (ArcGis, QGIS etc.).