Nowadays one of the most actual issues in oil & gas production on the fields is increasing of workover interval, especially in conditions of underdeveloped infrastructure of petroleum objects. In this paper the gas-jet technologies of the well reactivation and the well operation in abnormal operational conditions are proposed to solve actual problems of hydrocarbons (HC) production. This method is proposed as alternative of traditional jet pump (JP) technology. Analysis of current theories and practices of jet device (JD) application illustrated that today the least researched JD are JD for ejection passive fluid by power high pressure gas. They are named gas-jet devices (GJD). In this connection experimental studies of GJD were carried out. In this paper the results of complex experimental studies of gas-jet gas devices (GJGD) and two-phase gas-jet liquid devices (GJLD) and summarized characteristics of their work are described. As result of theoretical analysis and experimental studies optimal design of sonic GJD with the cylindrical throat depending on the type of passive stream was determined. Also influence of passive and power fluid on characteristics of GJD work was studied. Based on high volume of experimental studies results the procedure of GJD calculation for specific technological conditions was created. Moreover the technological schemes of optimization of gaslift wells on the Eastern Area of Orenburg Oil-Gas Condensate Field (EA OOGCF) and reactivation and operation of water-flooded gas wells by using wellhead and downhole GJD were proposed.

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High mechanical impurities content in production fluid is one of the main causes high mechanical impurities content in production fluid. In the field practice there are many technologies to minimize solid phase flow from reservoir to the bottomhole and various technique units to protect submersible pumping equipment. However, currently there is no detailed study of technical and technological efficiency parameters. Different methods and technologies to solve the problems of oil (water) well production, complicated by solid phase flow, are used. In this paper the study results of the submersible sand centrifugal separation for artificial lift are presented, with consideration of the abnormal well conditions. In Gubkin University at Reservoir and Production Petroleum Engineering Department (RPPED) experimental stand unit to complex study of submersible sand separator (model “PSM") with hydraulic gate was constructed. Experimental stand unit allows determining submersible sand separator (SSS) efficiency. The submersible sand separator experimental stand studies have been conducted on model mixtures “water – solid particles (suspended solids content up to below 2 g/l)" and “water – gas (flow gas content up to 60%) – solid particles". The influence patterns of suspended solids content, inlet flow gas content and granulometric on “PSM" separation efficiency are determined. The “PSM" efficiency was experimentally confirmed and the separation coefficient values were obtained, which exceeded the performance of the similar devices. The workflow to select candidate-wells for this protective device application was developed. A new technological scheme to lift separated impurities bypassing submersible pumping equipment on the day surface is proposed.

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Gaslift operation faces several challenges - optimizing the amount of gas pumped, ensuring that the gas is pumped to the maximum possible depth, combating salt and hydrate formation and, finally, the instability of the flow. The timely detection of these problems and the optimisation of the system requires information on the dynamics of the main parameters (flow rates, pressure measurements at each unit and the amount of gas pumped). In the conditions of high cost of multiphase flowmeters at the Orenburg field well flow rates are not measured often enough, and the task of identification of the most unstable wells in real time by auxiliary parameters measured with greater discreteness becomes urgent. Often important production decisions based on monthly data, and less often on daily measurements. In the paper the necessity to go down to the level of analysis of highly discrete information (dozens of measurements per day) is proved by the example of the Orenburg field, because in conditions of unstable operation the averaging inside the day can lead to distortion of the general view of the operating mode. Within the framework of the analysis of dynamic parameters of gas-lift wells operation in unstable conditions, the notion of well operation quality index was introduced, i.e. a normalized metrics reflecting the general state of stability of a gas-lift well operation. This metric considers uncoordinated changes in the main parameters of the system. The wells with the lowest index are the first candidates to search for hidden production losses (not achieving the regime flow rate). Modelling of well performance, adaptation of models to historical data - a typical approach to production management in the field. But in the conditions of unstable gas-lift wells modeling of their work is much more complicated. In this regard, the authors of the article developed an approach to modeling wells through the approximation relationship between the flow rate of wells and the flow rate of gas-lift gas and linear pressure with further integration of well models with the collection system. To solve well operation modes optimization problem, an integrated Proxy-model of the asset was created, which consists of a simplified reservoir model, developed well models and infrastructure model. The Proxy model was adapted and verified to the actual operating data. The task of finding the optimal distribution of gas injection between the wells from the point of view of oil production was solved.