Background. The West Siberian basin which is one of the main oil and gas regions of Russia is characterized not only by classical structural traps but also by extremely complex geological objects of Achimov sequence. Thereby, it is quite difficult to evaluate perspectives of license areas within which we can discover those Achimov type of deposits, especially at regional stage exploration in terms of a complete absence of 3D seismic data and uneven coverage of area by 2D seismic surveys. Aim. This article is devoted to the methodology description for probabilistic assessment of the resource base of non-structural traps in the Achimov strata in areas with different 2D-seismic exploration degree. Materials and methods. The methodology based on the “density” method which in relation to the evaluated area uses statistics of estimated parameters and number of bodies in the field analogs. The general line of this paper is how to use this methodology for resource base evaluation in the zones of Achimov deposits intersection as the most promising from the point of further development. Results. As part of the project evaluation according to the proposed approach, the resource base was divided into components — resources of objects in areas of possible intersection and resources of single, non-intersecting objects. Conclusions. It provides an opportunity to spot and conduct a technical and economic assessment of previously uneconomic reservoirs.

Background. Decline of oil and gas traditional reserves pushes companies to explore and involve in production complex reservoirs which results in exploration risks increase. That is why an exploration research has to be integrational and its’ main result has to be determination and decreasing uncertainties. Aim. The aim of this research is the planning of further exploration program within the studied territory, based on the main uncertainties and trends in geological development. Materials and methods. Several types of research methods were applied, including field observation, laboratory analysis and geological desktop studies. The results of petroleum systems modeling is the basis for source rocks maturity prediction, the main stages of hydrocarbons generation — migration and critical moment estimation. It also provided the analysis of migration distance (limits) and geological risks related to it, petroleum saturation prediction for the main plays. Great emphasis was also placed on the search and processing of additional archival data, which made it possible to significantly detail the structural-tectonic framework of the studied area. Results. Consistent progression in field observation, laboratory analysis and geological desktop studies allowed to narrow the range of uncertainties, clarify the chance of geological success (gCOS), plan the further exploration program, and highlight higher-priority license blocks. As a result, more than 60 additional prospects were identified, for each of them both the probabilistic estimation of oil and gas resources and chance of geological success evaluation were made. Moreover, the further exploration program was approved. Conclusions. Therefore, the study allowed to analyse main uncertainties and correct further exploration program on the basis of integrated analysis of geological development history and geological structure of the studied area.

Introduction. The aim of seismic exploration is to build a depth-velocity geological model based on the joint interpretation of seismic and well data. Seismic exploration provides uniform coverage of the studied area, and borehole data provide more complete and accurate information about the studied section at a discrete set of points (well locations). The results of the main stages of seismic data processing undergo quality control during interpretation support (ISO). The supporting task is to quickly carry out quality control (QC) at different stages of processing, starting from the earliest. Early detection of possible errors and selection of the optimal parameters of the procedures ensures high quality materials at the end of the processing stage. Seismic interpretation relies on the use of well data in conjunction with the seismic data and various attributes within a single interpretation package. At the same time, seismic processing and interpretation are historically separated by different software packages. Methods. The aim of the work was to create software tools that facilitate the interaction between processing and interpretation. The developed tools should: 1) include the functionality of interpretation packages necessary for interpretation support various stages of processing, 2) be able to access seismic data directly from the software for processing. Results and discussion. Successful testing of the created software tools showed the possibility of performing the necessary analysis without using specialized interpretation packages. The implemented software packages generate a report with QC metrics and figures, which the interpreter can view and make conclusions about the current stage of the processing.

Background. The article considers and justifies the need to take into account the indicators that characterize the amount of balance reserves involved in the development, as well as the increase in recoverable oil reserves due to EOR, when evaluating the technological efficiency of the treatment of the alignment of the pick-up profile (RUNWAY). Aim. If the increase in recoverable reserves is significantly less than production, this will lead to a loss of oil production potential. This fact is of particular importance in the conditions of the arrangement of the old squares and the presence of a developed infrastructure on them. Materials and methods. Materials were used to assess the dynamics and degree of development of oil reserves, calculations of the increase in recoverable reserves. Results. The article presents the results of the accumulated technological efficiency of work to improve oil recovery using various technologies for leveling the intake profile (runway) and non-stationary flooding at the facilities of Subsurface user in Khanty-Mansi Autonomous Area – Yugra on the basis of system-targeted impact on the reservoir. The article also presents materials on the assessment of the dynamics and degree of development of oil reserves, as well as calculations of the increase in recoverable reserves. Conclusions. Calculations based on the assessment of the increase in initial and residual recoverable oil reserves from the implementation of annual EOR programs carried out in accordance with the methodology of PJSC Gazpromneft indicate that the implementation of these programs contributes to additional involvement in the active development of previously poorly drained or non-drained oil reserves.

Background. Designing problems of oil fields infrastructure in the Arctic under climate change, namely, applying of temperature coefficient when calculating bearing capacity, heaving of lightly loaded foundations, optimization of thermal stabilization solutions are presented in the article. Aim. To change the strategy for designing foundations on permafrost by choosing the worst soil conditions to the implementation of an invariant matrix for designing and construction of soil bases and foundations considering specifics of industrial facilities of oil and gas fields based on unified numerical calculations (regulations). Materials and methods. An overview of the current regulatory requirements to the design of foundations on permafrost is made. The analysis of forecast modeling of the temperature of soil bases of typical industrial facilities of oil and gas fields to justify design solutions and also the use of thermal stabilization systems is done. Results. It is proposed to develop a regional directory of weather stations with long observation period based on updated climate data to decrease the volume of designing work and the amount of mistakes in applying of thermal stabilization systems. It is necessary to create regional dynamic models of permafrost geosystems, implement forecast modeling of seasonal thawing potential depth and frozen ground temperature in natural landscapes on the base of geotechnical monitoring data and select adaptation methods to existing or expecting climate change trends. Conclusions. Regulations on designing and construction of soil bases and foundations on permafrost considering specifics of industrial facilities of oil and gas fields is an effective solution. It allows moving on the strategy implementation of uniform approaches to oil fields development on permafrost: from designing for every structure on the base of typical solutions and results of engineering surveys to invariant matrix of project solutions.

Aim. As part of a large-scale business transformation, Gazprom Neft is implementing new approaches to improving economic efficiency. One of such approaches is the launch of the “Renovation” project program, the purpose of which is to achieve maximum profitability of the basic well stock. The article describes the results of the study and formation of a set of measures to improve the economic efficiency of oil production at the fields of Gazpromneft-Khantos. Materials and methods. The key feature of “Renovation” is that the goal setting and the formation of key performance indicators of project teams are made not from the previously achieved result, but from the potential. To do this, a detailed technical and economic analysis of the factors affecting the profitability of oil production is first carried out, and the potential for increasing profitability is determined. After that, hypotheses are worked out to increase the economic efficiency of production and a set of measures is formed to realize the identified potential. The cross-functional teams of the “Renovation” program projects are formed around the core-team that includes specialists in geology, development, production, engineering, energy management, economics and IT. This allows teams to solve non-standard tasks in a short time, in a complex way, without attracting external leverage, which is an absolute competitive advantage. Results. The program of optimization measures developed by the cross-functional team of the Renovation project will provide the potential for the growth of the profitability of Gazpromneft-Khantos in the period from 2021 to 2030. Conclusions. The article presents the developed and implemented cases on reducing operating costs in various areas — geology and reservoir engineering, energy efficiency, oil production technologies, downhole operations and hydraulic fracturing, oilfield chemistry.

Background. This article provides an overview and testing of existing robotic solutions, an understanding of the level of technological accessibility for the research area. A robotic solution is a device, mechanism or method for carrying out work with a high level of autonomy and with minimal human involvement in work in a hazardous area. In this case, we are talking about remote-controlled solutions, as well as completely self-managed solutions. Aim. The purpose of the study is to analyze the design and regulatory documentation that regulates the study area of work, to identify the main technical and legislative barriers and restrictions on the use of robotic solutions, as well as to conduct tests in Kingston boxes of the Prirazlomnaya OIRFP. Materials and methods. In this study, using rational-logical methods of scientific knowledge and the empirical method, namely interviewing experts in the field of robotization and maritime law, it was possible to determine and structure the information received. Results. The implementation of this goal made it necessary to analyze the market for various robotic means of local cleaning and inspection, to form a list of the most promising solutions, to rank solutions based on the evaluation matrix, to conduct technical and competitive negotiations with manufacturers on the topic of readiness to participate in pilot testing at the Prirazlomnaya OIRFP. Conclusions. In the course of this project, an extensive analysis of the market of robotic solutions was carried out, pilot tests were carried out, an act was received from RMRS and proved in practice during pilot testing in Kingston boxes with water intake pipelines and in the water area of the Kola Bay, a hypothesis about the applicability and feasibility, the usefulness of using remotely controlled underwater of uninhabited vehicles in the scope of the survey at the Prirazlomnaya OIRFP.