The traditional approach of consistently creating a petrophysical, geological, and then a dynamic model leads to an increase in time and labor costs and, often, the disruption of time due to the iterative process of aggregating geological and geophysical information into a single conceptual three-dimensional model of the field. In order to reduce administrative resources for the creation of 3D geological and dynamic models, a cross-validation interaction scheme is proposed that consists in constructing simplified dynamic models (box models) at the petrophysical stage and early stage of geological modeling. The use of this approach to the field of Western Siberia has made it possible not only to shorten the time of the model creation, but also to improve its level of predictive ability and the consistency of various sources of geological and geophysical information without loss of data between the stages of work. The aim of the work was to improve the quality and level of thoroughness of 3D geological and dynamic models and reduce labor costs. The proposed cross-validation approach can be replicated to any other geological and dynamic modeling projects.

This paper focuses on the Planar3D model for a hydraulic fracture in a layered medium. The specificity of the described approach is to use the explicit time integration scheme and reduce the system of partial differential equations to a dynamic system. The position of the crack front is determined using the universal asymptotics of the crack tip written for non-Newtonian fluids. The calculations are compared with the published results of the ILSA and EP3D models, and methods of acceleration and ways to account for additional effects are discussed.

Well testing are a source of key information for planning and control of field development. Due to technological limitations and the economic costs of conducting research the full-scale research coverage of existing wells is difficult. This article describes an approach for assessing the need of WTA at the planning stage of well drilling based on the value of information (VOI) methodology.

Across company’s portfolio of technological projects an especial place is reserved for gas technologies and miscible flooding is one of them. It allows to increase current production and overall recovery factor but also helps utilize light gas components which otherwise would be flamed or sold without extra value. The oil field under consideration includes several oil rim reservoirs. The main consideration behind its development strategy was to use all available resources as efficient as possible. The gas plant is designed to produce stabilized NGL from associated gas and mix it with oil to gain extra value from increased volume and lightness. Lean gas is injected into gas caps. The other product is C₂-C₄ which could be sold with lean gas or put to good use and be injected in oil rim to displace oil in a miscible way. At the beginning PVT model was designed and MME was evaluated. Having results from actual lab experiments and compositional simulation software available optimal composition of injection fluids and pressure regimes were investigated. Reservoirs were ranked and most prominent chosen. Current and planned patterns of oilfields were studied for best injector location. Integrated models were built to monitor and predict produced and injected gas compositions and volumes. In addition they allowed watching for bottle-necks in production network, cryogenic plant, gas facilities and calculation of recycling volume.

The paper presents a comparative analysis of advanced numerical hybrid optimization algorithms for solving a specific problem of increasing the efficiency of the waterflooding in a mature field (Brownfield). Via multivariate iterative calculations produced by the optimization algorithm, on the basis of the reservoir simulation model the optimal waterflooding strategy (optimal combination of well modes) is determined. This strategy maximizes the economics of the field which is expressed in the value of net present value (NPV). The optimization process in most practically significant cases is complicated by the following factors: large dimension of the solution space, high complexity of the optimized function and high computational cost of each reservoir simulation. As a result, for the allocated project time the final solution can strongly depend on the chosen optimization algorithm. Comparison of the hybrid algorithms was based on the solution of the real Brownfield waterflooding optimization problem with more than 100 active wells. In addition, these optimization algorithms were compared with algorithms that do not use hybrid modeling.Relative improvements of the objective function, NPV, were compared with respect to the number of required reservoir simulations. As a result, the set of recommendations for choosing the most effective algorithm depending on the available project time was obtained. As a result, an analysis was made of the effectiveness of hybrid optimization methods as applied to a specific optimization problem, and a set of recommendations was obtained for choosing the most efficient algorithm depending on the available project time.

In this article described possible approach to the organization of the integrated model at waterflooding management and basic elements of the digital model of the FPM. Offered the scheme of identification of an optimum zone of mutual work of parts of a system of wells and an action for relocation of wells from the deviating zones in an optimum zone is also. Presented the results of approbation of the described approach.

Multi-stage hydraulic fracturing (MSF) in horizontal wells is an effective method of increasing well productivity. The increase in the area of contact of the well with the reservoir allows to maximize the previously not involved in the development of the reservoir intervals, to increase its oil recovery. The development of this technology is facilitated by the depletion of the resource base of high and medium-sized oil reserves and the need to involve hard-to-recover reserves, the boundary zones of the fields. The technology MSF is selective stimulation in horizontal open hole reservoir, sequential creation of fractures fixed by the wedging agent (proppant), or treatment with acid compositions The selectivity of stimulation and division of the horizontal section into zones is carried out through the use of special configuration a liners. During operation, the productivity of such wells begins to decrease over time. And today the issue of re-fracturing of horizontal wells with MSF is one of the most urgent problems for our Company. The accumulated experience with directional wells shows that the most effective method of recovery of productivity of wells with hydraulic fracturing after 3-5 years of operation is to conduct operations of repeated hydraulic fracturing.

Traditional mathematical modeling tends to set limits to the amount of computational experiments to be conducted with mathematical models in order to optimize solutions. Over recent years, metamodeling – a new, alternative approach – has been rapidly developing with a view to facilitate the solution of optimization challenges. Such models are built upon the ideas of machine learning, when the models’ training set is derived from numerous prototypes of input and output data (results of field and computational runs with varied data types). The models are built to imitate (replace) the physics-based mathematical models and reduce computational time and decision-making period. In this paper, we offer approaches for metamodeling (data models) of various levels of complexity depending on actual tasks. We show that application of metamodels significantly reduces the amount of time and computational resources required for solving a wide range of petroleum engineering challenges, e.g. selection, monitoring and optimization of field development. Metamodels returns results without any loss of quality compared to traditional «physical» models.

The waterflooding process optimization is a possibility to increase oil recovery and reduce inefficient costs, which does not require workover activities. Various approaches have been used in the Company to reduce inefficient water injection and maintain of oil recovery rates for fields with a great number of wells. Results of testing developed tool for achieve the potential of basic production are presented in this paper. The main advantage of this tools compared with commercial simulators is possibility of rapid analysis of a large number of wells with further automated selection of optimal technological parameters. The functional of tools also include the selection of candidates for the bottom-hole treatment, isolation squeeze, geophysical study in well and well hydrodynamic studies. In order to test the instruments, experimental program had been carried at one of the sections of the BV81 formation at the Vyngapurovskoye field. Results of experimental program presented in the work. According to the results of the pilot survey, a large number of wells were analyzed, according to the results of which wells were allocated: with a recommendation for reducing injection due to high compensation (9 %); with inefficient injection of the working agent (40 %); with effective injection of the working agent, but requiring its reduction due to the possible influence of the aquifer (6 %); with a recommendation for increase injection due to low compensation (9 %); with an optimal mode of operation (24 %).

In the conditions of persistently increasing consumption of hydrocarbons, it is urgently required to find and develop new reservoirs. In this context, exploration and development of oil and gas reserves on the continental shelf is of high concern. For Russia this is the shelf of the Arctic Ocean. Development of the Arctic shelf is connected with construction of various marine and surface structures supported by piles driven by hammers. The article analyzes and compares performance of foreign-manufacture steam-air and hydraulic hammers and home-produced electromagnetic hammers. Advantages and prospects for application of electromagnetic hammers in marine construction under subzero temperatures are demonstrated.

Thawing of frozen ground, surface subsidence and formation of funnels in wellhead area during operation can lead to stability disturbance of wellbore and its lateral displacement. Effective solution of this problem which helps to minimize thawing area around well is use of insulated tubing (thermocase). The article presents the results of forecast modeling of soil bases temperature regime. The minimal length of thermocase depending on well spacing and criteria for its determination were set for multiple well pads of Vostochno-Messoyakhskoe field.

The article describes the experience of using the block-modular method of building oil and gas facilities in the north of Russia using large blocks (super blocks). The technology of their delivery and installation is described. The advantages of using this technology are determined and the main problems of its introduction in Gazprom Neft are studied. The key stages of the development of the technological project “Search and Implementation of block construction objects” are considered, at present the main task of which is to assess the possibility of using superblocks in Gazprom Neft and the economic effect.

For many years, the enormous potential of the Internet of Things has been constrained by technical constraints, such as the short life span of battery-powered devices, short-range communications, high cost, and the lack of uniform standards. This article describes the technology, called LoRaWAN (Long Range wide-area networks), which allowed to overcome all these obstacles. Based on the new specification and new protocol for LPWAN, LoRaWAN technology allowed connecting sensors over long distances, while offering optimal sensor battery life and minimum infrastructure requirements. The LoRaWAN technology has a significant potential for use for oil production facilities in order to reduce unproductive time and speed up technological processes.