Gazovaya promyshlennost’№ 6 2017

» Practical application of the hybrid real-time power system simulator

The publication [1] demonstrated a detailed description of the hybrid simulation concept of electrical power systems (EPS). This article is its continuation [1] and presents the description of the practical application experience of the hybrid real-time power system simulator (HRTSim) for the purpose of solving specific tasks regarding the control of the Tyumen power system (TPS). The article presents fragments of fast turbine valving control which, in our Russian practice, is one of the main emergency control tools that regulate the capacity of an electric power station. EPS’s operational stability depends on the adjustment of this automation to a large extent, therefore any incorrect adjustment can lead to significant perturbation or loss of stability which already happened in the past. With the use of the HRTSim, we managed to solve one of the most complex tasks in the electric power industry of Russia – to adequately adjust the fast turbine valving control of a high-power thermal electric power station – Surgut GRES-2 Power Station which we were not able to do in the past. The adequateness of the simulation of a turbine and fast turbine valving control of power unit is confirmed by comparing them with the data of real experiments at a real facility. Following the research results, we created a method for the selection of the best adjustment parameters for the fast turbine valving control at Surgut GRES-2 Power Station which can be applied at other electric power stations of Russia as well. The work was performed as part of project No. МГ-2017/04/1 «Development of a Hardware and Software Platform for the All-Mode Real Time Simulation of Smart Grids» which is implemented with the assistance of Non-Commercial Partnership «Global Energy». The group of authors won the International Award «Global Energy» in the Youth Section in 2016.

Keywords: HYBRID SIMULATION, MATHEMATICAL SIMULATION, REAL TIME, ELECTRIC ENERGY SYSTEMS, STEAM TURBINES, EMERGENCY POWER CONTROL.

Open PDF

» Increasing the efficiency of forecasting the content of natural gas in continental shale rocks using the example of the Ordos basin

» Integrated approach to the development of oil and gas condensate deposits with an oil leg in the presence of bottom water with the use of multifunctional wells

The development of fields with hard-to-recover oil deposits (HROD) confined to low-powered oil legs with bottom water is a topical issue for a great number of production companies all over the world. The main complexity in the development of such deposits lies in a practically unavoidable formation of gas and water cones. This work proposes an approach to the development of such fields that provides for the use of multifunctional horizontal wells with complex well completion that allows effectively using the gas cap’s power and managing risks related to influxes of basement water. Design goals of the development and arrangement of an oil and gas condensate field (OGCF) in this work are solved with the use of an integrated model «Bed – Well – Aboveground Infrastructure» that allows coordinating the solving of goals of underground hydrodynamics and transportation of products in the well and the collection system, taking into account a complex interrelation of all design objects «from the bed to the collection and transportation of hydrocarbons». The integrated model’s creation stages are presented, as well as simulated examples of complex engineering operations, such as commingling of a gas-saturated interval in multifunctional wells and organization of intrawell direct gas lift, switching wells from the low pressure collection system to the high pressure collection system. The results of operation of actual multifunctional wells obtained as part of industrial experiment works are presented.

Keywords: MULTIFUNCTIONAL WELL, INTEGRATED MODEL, OIL LEG, GAS CAP, INTRAWELL GAS LIFT.

Open PDF

» Distribution and peculiarities of annular gas flows at the Yamburgsk oil and gas condensate field

» Quantitative measurement of the bacterial contamination of oil and gas recovery facilities

» Energy consumption optimization of gas air cooler units at a later stage of field development

Одним из важных звеньев в подготовке газа к транспорту является система охлаждения. Для охлаждения потока газа на дожимных компрессорных станциях (ДКС) получили широкое распространение аппараты воздушного охлаждения (АВО), имеющие ряд преимуществ перед другими типами теплообменных аппаратов: они надежные в эксплуатации, экологически чистые, имеют простые схемы подключения, не требуют предварительной подготовки теплоносителей. В статье рассмотрены АВО блочного типа с системой рециркуляции нагретого воздуха, применяемые для охлаждения компримированного природного газа (КПГ) на ДКС ООО «Газпром добыча Ноябрьск». Рассмотрены и представлены варианты реализации различных схем охлаждения КПГ на Комсомольском газовом промысле, при которых изменяется структура истечения природного газа в трубных пучках АВО, однако не затрагивается и не изменяется конструкция элементов существующей системы охлаждения природного газа.

Keywords: AIR COOLER UNIT, BOOSTER COMPRESSOR STATION, NATURAL GAS COMPRESSING.

Open PDF

» How much do fields in the Artic shelf cost amid the crisis?

» Approaches to the development of the method to assess safety of the compressor station personnel in case of fire using methods of simulation modelling

This paper described the methodology for an assessment of the personnel safety during the evacuation of the engine room of a gas compressor unit. The methodology is based on a mathematical model considering randomness of changes in the evacuation time. It is considered that the evacuation time depends on the speed of walking along escape routes, including not only standard escape paths but paths that may go through machinery rooms of gas compressor units, up or down the ladders, along scaffolds and through areas where the movement may be restricted for various reasons. Apart from that it is considered that the duration of the evacuation may be affected by people’s behaviors, the speed at which a fire hazard appears, the delayed action of a fire alarm system and the evacuation management system, the duration of emergency actions taken by the personnel. The index has been introduced according to which the safety of the evacuation on a specific escape route is assessed, and which considers the above mentioned factors. Moreover, the probability formula for the evacuation of employees from the engine room has been created, that also considers the factors of the safety of the routes and reliability of a protection system. The methodology has been implemented by means of a simulation model of the evacuation of people, the structure and the basic idea of which were described in the paper.

Keywords: EVACUATION, ESCAPE ROUTE, EVACUATION START TIME, FIRE SAFETY, FIRE HAZARDS, FIRE RISKS, FIRE PROTECTION, GAS COMPRESSOR STATION, GAS TURBINES, SIMULATION MODEL, STATISTICAL TESTING.

Open PDF

» Factors which allow reducing capital investments in the creation of Russian gas reserves at underground gas storage facilities abroad

» Under coating corrosion analysis on the results of in-line inspection and electrometric diagnostics

» Expediency of export of liquefied natural gas from LNG low-tonnage factories

» Possible optimization directions for large-scale LNG plant projects

» Surge protection system development in centrifugal compressor with an indicative method using numerical simulation of unsteady processes and analysis of pressure fluctuation signals

Nowadays, anti-surge protection system based on parametric method is widely used. The disadvantage of this anti-surge system is the fact that it is not possible to fully ensure the safe operation of the compressor at low flow conditions, because large measurement error will occur. Other method of anti-surge protection is indicative method. This method is what it is necessary to detect occurrence of rotating stall in time on the score of information criterion. Further the control decision is accepted in connection with the approach to the danger zone of surge. Indicative method is more complicated and requires special signal analysis such as wavelet analysis, periodogram analysis, correlation analysis. Also in addition to the methods of analysis, important is the length of the sample for processing unsteady pressure fluctuations and the method of its displacement on time. It is now possible to mathematically pre-simulate unsteady processes in the flow part of centrifugal compressor.

Keywords: CENTRIFUGAL COMPRESSOR, UNSTEADY PHENOMENA IN TURBOMACHINERY, SURGING, ROTATING STALL, PRESSURE SURGE, PROTECTION AGAINST SURGE.

Open PDF

» Study of a backflow element of a multicyclone for gas treatment at gas distribution plants

Local atmosphere contaminations caused by production facilities pose a serious challenge to the sustainable development of industrially developed regions, and their continuous growth is becoming one of the most unsettling problems of ecology. The majority of contamination materials of such emissions are accounted for toxic gaseous and dust materials. The former can dissipate, migrating for long distances, and the latter are often concentrated in the air of the enterprise, as well as in the surrounding atmosphere and even reach the nearest residential area buildings. Therefore the development of many branches of production in combination with the goals of resource conservation is often closely linked to the problem of separating dust-containing flows. Cyclones are the most wide spread modern air dust removing devices. Their advantages include compactness and simplicity of design, which accounts for the decrease in value of dust-collecting plants. The main disadvantage of cyclone apparatuses is an increasing dependency of the dust-collection efficiency and energy consumption on the pumping of a dust-laden flow through a dust-collection apparatus. Multicyclones are mainly used for the purpose of increasing the throughput capacity of gas treatment systems. However they are of interest in the present context when gas treatment requirements are raised and because of their higher degree of treatment which is caused by the use of small-diameter cyclone element. The article considers the possibility of installing a filtering element into cyclones united in a multicyclone which will lead to a decrease of operating costs when treating dust-laden flows with no damage to the efficiency of treatment itself.

Keywords: CYCLONE, FILTER, GAS TREATMENT ASSEMBLY, SIMULATION

Open PDF

Gazovaya promyshlennost’ № 6 2017

Read in this issue:

Automation (including Robotics for oil and gas industry, Software systems, Data analysis, etc.)

GEOLOGY AND GAS FIELDS DEVELOPMENT

GAS AND GAS CONDENSATE EXTRACTION

SHELF DEVELOPMENT

OCCUPATIONAL AND INDUSTRIAL SAFETY

Underground gas storages

Repair and diagnostics of main pipelines, compressor plants and pumping stations

Liquefied natural gas (LNG)

Gas and gas condensate transportation

Ecology