The problem of effective technology for heavy oil recovery nowadays has a great importance, because of worsening geological conditions of the developed deposits, decreasing recovery factor, increasing the part of heavy oil. For the future sustainable development of oil producing industry the involved technologies must require energy effectiveness and ecological safety. The paper proves the enhanced oil recovery methods necessity for heavy oil deposits, highlighted thermal technologies as the most effective. But traditional thermal treatment technologies is a source of air pollutant emission, such as CO, NO etc. The calculation of emissions for traditional steam generator is provided. Besides, the paper shows the effectiveness of electrical enhanced oil recovery methods. The advantages of associated gas as a fuel for cogeneration plants is shown. The main approaches to implementation of carbon dioxide sequestration technologies in the oil and gas industry of Russia are defined. Conceptual view of СО2-EOR technologies potential within the context of sustainable development of oil and gas industry are presented. On the basis of the conducted research a number of scientific research and practical areas of the CCS technology development are revealed.
The paper deals with power supply systems reliability of gas pumping compressor stations. Comparative analysis of the system reliability with hot, warm and cold reserve is processed. The modelling was performed using the software complex “ARBITR”. Dependability measures were determined for different types of power supply systems with different set and number of power sources including centralized power supply system, autonomous power stations and others. Recommendations on the use of various types of redundancy for various structures of power supply systems are given.
Energy characteristics of electric drives with frequency converters are generally determines with unit working mode and effectiveness of autonomous inverter (AI) operating, which set the voltage level for the actuating machines windings. Also, the structure of output power flow, consumed by actuating engine has been determined in dependence with AI mode. These facts explain the actuality of researches in the field of semiconductor converter working mode, it output power and control methods. The two methods of autonomous inverter operating have been investigated: pulse-width modulation and phase modulation. The paper shows that during pulse-modulation mode voltage distortion factor decreases, but the current distortion factor increases. Output phase current and voltage hodographs show that resultant vectors of this coordinates during PWM mode moves with higher smoothness, but in phase modulation mode it moves in steps. Power distortion for PWM mode is higher, active power share in the total power structure decrease. It leads to higher energy consumption during AI operating with an equal load. For the power consumption decreasing and higher energy efficiency, it recommended using energy saving control algorithms, providing smooth resultant output voltage hodograph shifting and higher voltage distortion factor value.
The work effect of the heating element of a downhole electrothermal complex on the electric power quality at 35 kV in an isolated neutral distributing network and at 110 kV in a grounded one is investi gated. Different variants of the power control transmitted to the heating element, namely, the phase and inte gral control, as well as their advantages and drawbacks, are considered.
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