Power supply complexes of fields – features of creation and reliable operation
Auxiliaries power supply complexes of the fields provide electricity and heat to infrastructure and production facilities of oil and gas fields, increase energy efficiency, profitability and environmental friendliness of hydrocarbon production.
Ensuring the energy autonomy of fields is a complex task that involves: developing and implementing unique engineering solutions, analysis of reliability and environmental friendliness, assessment of efficiency, economic and technical risks, selection rationale of generation and technological equipment, and focus on the quality of fuel gas.
WHY AUXILIARY POWER SUPPLY COMPLEX IS NECESSARY
The need to create an auxiliary power supply complex (APSC) for a particular field is due to the primary and accompanying reasons. Among them:
- Costs of energy supply and heat are comparable to the costs of building your power plant (new construction);
- Problems with regional power grids or with the cost of additional electricity (capacity expansion);
- Availability and quality of electricity, critical for the technological process continuity or fraught with irregularities in the procedure;
- Fines for emissions of associated petroleum gas and other products into the atmosphere, which are comparable to the cost of power plant equipment;
- Possibility of using cheap or own "free" gas as fuel for the power plant;
- Constant expectation of an increase in electricity tariffs;
- Remoteness of the field from utilities, which complicates the transportation of hydrocarbon raw materials.
 ЭСН-НиГ/845-2.jpg "The largest auxiliary power supply complex – GTPP of the Talakan field (144 MW)")
APSC AS THE BASIS OF ENERGY EFFICIENCY
The power supply complex works on the energy efficiency of oil and gas production, helping the owner to solve the following tasks:
- Electricity base-load provision in conditions of network constraints;
- Thermal power generation for fields facilities;
- Meeting process needs for hot water and steam for injection into reservoirs;
- Reducing the energy resources consumption costs;
- Decrease of the enterprise's dependence on the tariff policy in the electricity market;
- Growth in the volume of rational use of associated petroleum gas.
However, problems are associated with the complexity of the construction of power supply complexes in remote fields, ensuring environmentally friendly generation and supplying excess electricity to the general grid.
GRPP OR GTPP?
The most common generator drives for decentralized power plants are gas-reciprocating engines (GRE) and gas-turbine engines (GTE). When choosing between them, the owners of future APSCs first ask questions of fuel consumption and operating costs associated with the achievement of benefits and the payback period of the equipment.
It should be noted that the specific fuel consumption per kWh generated is lower for a gas-reciprocating unit and at any load mode (Figure 1). This is explained by the fact that reciprocating machines' efficiency is 36 ... 45%, and for gas turbines (in a simple cycle) – 25 ... 34%.
Comparing operating costs for gas-reciprocating and gas-turbine power plants also speaks in favour of the former – they are lower for GRPPs (Figure 2). Major overhauls of the turbine are marked with sharp jumps on the GTPP graph. GRPP’s overhauls require significantly less financial and human resources.
Figure 1. Specific fuel consumption of gas-reciprocating and gas-turbine engines Figure 2. Operating costs for a 5 MW power plant
 ЭСН-НиГ/845-33.jpg "Figure 1. Specific fuel consumption of gas-reciprocating and gas-turbine engines. Figure 2. Operating costs for a 5 MW power plant")
It would seem that the choice is obvious. But GRE and GTE are compared according to many criteria, including durability, maintainability, the influence of live load, placement in the building, frequency and localization of maintenance, environmental friendliness, etc. In Russian conditions, import substitution also plays an essential role in the choice of generating equipment.
Experts believe that gas turbines are more profitable in large fields with a developed infrastructure that has significant (over 20 MW) electrical loads. The owner's thermal power needs are also taken into account, which is provided by GTPPs operating in the cogeneration cycle.
On the other hand, gas-reciprocating units are more promising for power supply complexes of small fields and temporary APSC operating in the initial field infrastructure development period.
Expert data indicate that the fields' energy autonomy is still in demand – in 2020 alone, 11 APSCs (8 gas-reciprocating and 3 gas-turbine) were commissioned in Russia. In 2021, it is planned to launch another 15 power plants (10 GRPP and 5 GTPP).
FUEL FOR APSC
Associated petroleum gas is the most common fuel for the APSC of the fields, which is due to the high efficiency of this method of rational utilization of the produced APG and the absence of costs for advanced refining of "difficult" hydrocarbon raw materials.
 ЭСН-НиГ/845-4.jpg "The gas-reciprocating power plant of the Barsukovskoye field operates on associated gas")
There are power supply complexes that use natural gas as fuel. Such APSCs are being built, for example, in fields where the demand for electric and thermal energy is high, and the own APG reserves are insufficient for long-term operation or complete utilization of turbines. Sometimes such a deficit is made up for by the "forwarding" of the feed thread from the nearest field with excess volumes of associated gas, but this supplements the existing experience.
There are interesting projects of autonomous power plants using different types of fuel at different stages of operation. Some fields' infrastructure, especially remote and inaccessible ones, are not immediately developed to supply the APSC with associated gas, and natural gas is temporarily used. The field receives the necessary volumes of its energy, and upon reaching a certain level of infrastructure development, the correct transition of the power supply complex to APG occurs.
For instance, this path was taken by the Vatyegan GTPP and the northernmost mainland GTPP – East-Messoyakha. In case of interruptions in the supply or depletion of APG reserves, the existing APSCs can again switch to natural gas since the infrastructure was prepared from the outset for this case.
COMPREHENSIVE TREATMENT OF FUEL GAS
The treatment of fuel gas (regardless of its type) is a indispensable technological process required for the systematic, efficient and reliable operation of power supply complexes.
It should be noted that the ENERGAS Group has supplied and commissioned gas treatment equipment for 26 APSC built by LUKOIL, Surgutneftegas, Gazprom Neft, Rosneft and others. Fuel here is treated for 111 gas-reciprocating and gas-turbine power plants with a total capacity of 1,163 MW (Figure 3).
Figure 3. Generating units as part of the fields’ APSC, conjugated with the ENERGAS units
 ЭСН-НиГ/845-66.jpg "Generating units as part of the fields’ APSC, conjugated with the ENERGAS units")
There are fuel gas treatment stations, booster compressor stations, multimodule gas treatment facilities, and gas-control stations at the fields. ENERGAS process units provide the fuel gas's design parameters for the modern generating equipment of leading Russian and foreign manufacturers.
Units intended for work as part of power supply complexes of fields are designed and manufactured considering the operating conditions, composition, quality and characteristics of the source gas, type and capacity of conjugated gas-consuming gensets, process tasks, and particular project requirements.
Gas treatment equipment is fully automated and aimed for intensive operation mode. It is supplied in a container (mono-, double-blocks), intra-shop (hangar) and multi-module versions, in an easy-to-assemble enclosure or on an open frame. The range of unit capacity of the units is from 500 to 150,000 m3 / h.
Units of various purpose can be combined and merged into systems for comprehensive gas treatment and fuel supply. Such systems provide purification, drying, heating, compressing (or pressure reducing), analysis of component composition, process or commercial metering of a gas entering the power supply complex site.
Additionally, quality control is carried out – measurement of various parameters of the gas fuel treated and supplied to the gensets: the content of impurities, humidity, temperature, density, pressure, calorific value (combustion heat).
 ЭСН-НиГ/845-7.jpg "ENERGAS system for comprehensive gas treatment and fuel supply")
EXAMPLES OF ASSOCIATED GAS TREATMENT FOR APSC
APG treatment facility for gas-reciprocating power supply complex of Barsukovskoye field
Barsukovskoye field in Yamal-Nenets Autonomous Area is developed by LLC RN-Purneftegaz (Rosneft). Since 2019, this field's infrastructure and process facilities receive electricity from an autonomous power supply complex consisting of 10 Cummins gas-reciprocating units (GRU) of type C1540 N5C with a capacity of 1.5 MW each.
The ENERGAS fuel gas treatment facility prepares the locally recovered associated petroleum gas before supplying it in the GRU. This FGTF provides the design parameters of fuel in terms of temperature (+20 ... +30°C), pressure (0.3 MPa), flow rate (1,250 ... 5,000 m3 / h) and purity (purification efficiency is 100% for liquid fraction and 99.9% for solid particles larger than 2 microns).
The FGTF is a multifunctional complex, which comprises: a gas filtration system with two-stage coalescing filters, a subassembly of condensate gathering and storage with an underground drainage tank, a unit of commercial gas metering with ultrasonic flow meters, a two-line reduction system, a gas heating module based on a shell-and-tube heat exchanger.
The process flow scheme of facility includes modular boiler room (MBR) with a total useful thermal capacity of 0.19 MW. Integrated MBR prepares intermediate heat carrier for gas heating subassembly and consists of 2 water-heating boilers – working and standby (for low flow rate). In addition to the main process function, MBR simultaneously provides the own needs of the FGTF – the generated heat is also heating its premises.
 ЭСН-НиГ/845-8.jpg "Process compartment of APG treatment facility for power supply complex of Barsukovskoye field")
Comprehensive gas treatment system for GTU-CHPP at Usinsk field
The own power supply complex of LLC LUKOIL-Komi was created based on GTU-CHPP with an electrical capacity of 100 MW and a thermal capacity of 120 Gcal / h. GTU-CHPP is 4 power units, each of which includes a GTE-25PA gas turbine unit and a waste-heat boiler. Today, the possibilities of the Usa power supply complex make it possible to develop production at the fields of the Denisovskiy licensed area.
The design parameters of gas fuel are provided here by the ENERGAS multifunctional system – associated gas treatment station (AGTS) and booster compressor station (BCS) composed of three units.
AGTS carries out separation and filtering of common APG flow, heating and pressure reduction of gas for the boiler house of the power supply complex, as well as the measurement of the volume of fuel, separately reaching to GTUs and boiler house. After preliminary treatment, the gas intended for the power units is directed to the BCS, which compresses it and feeds to the turbines.
The feature of this project is the high content of liquid fractions in the APG. The required fuel values for humidity are achieved in several stages. At first, the associated gas enters the AGTS separator-slugcatcher, where the primary separation is underway, and the peak liquid injection are neutralized. Then gas passes through coalescing filters of AGTS and filters-scrubbers of BCS.
At the final stage, the method of recuperative heat exchange is used – each compressor unit is equipped with a gas drying module operating in temperature recovery mode. For this purpose, a chiller and a heater are integrated into the delivery line, which form an interim circuit and successively cool the gas, separate and remove the condensate, and heat the gas. The fuel dried in this way is fed to the turbines of the power supply complex with a temperature of 20°C above the dew point.
 ЭСН-НиГ/845-9.jpg "Gas compressor station and associated gas treatment station for GTU-CHPP at Usinsk field")
EXAMPLES OF NATURAL GAS TREATMENT FOR APSC
Fuel gas treatment facility for GTPP and facilities of CGCTP at the East-Urengoy licensed area
At the East-Urengoy area of JSC Rospan International (Rosneft), the complex gas and condensate treatment plant (CGCTP) operates. In 2020, the fuel gas treatment facility (FGTF) was integrated into its structure and brought to full design capacity.
FGTF ENERGAS performs filtering, flow measurement, heating, pressure reducing of gas and supplies it to the primary and auxiliary facilities of CGCTP. Among them: boiler house, flare unit, intake flow lines, burner for combustion of industrial wastes, booster compressor station of low-pressure gases, technical propane-butane purification unit from methanol, low-temperature separation unit, methanol recovery unit, condensate stabilization unit. Note that for each consumer, the gas is supplied with individual parameters.
An essential function of the FGTF is the fuel supply of a new gas turbine power plant for own needs with a capacity of 105 MW, built on the CGCTP site. This GTPP composed of seven Titan 130 turbines (Solar) provides electricity for the facilities of production, processing and transportation of oil, gas and gas condensate located on East Urengoy.
The FGTF consists of the main and standby fuel gas treatment modules (FGTM) which are separate buildings composed of several process block-boxes. FGTM-1 guarantees the needs of 100% of CGCTP consumers. FGTM-2 starts the operation when the main module is stopped and supplies gas fuel to the GTPP and the boiler house. The capacity of the modules is 90,400 and 32,612 Nm3 / h, respectively.
 ЭСН-НиГ/845-10.jpg "Fuel gas treatment facility for GTPP and facilities of CGCTP at the East Urengoy")
Gas treatment and gas supply system for the Yarega gas-turbine power supply complex
The Yarega power supply complex, built by LUKOIL-Energoengineering LLC, is another facility of own generation in the Komi Republic. It includes three GTPP-25PA gas-turbine power units (JSC UEC-Aviadvigatel) with a total capacity of 75 MW. For the heat output, three waste-heat boilers with a total steam productivity of 121 t / h were installed here.
The possibilities of the power supply complex provided the growing needs for electricity and steam of the strategic Yarega oil and titanium field, increased the effectiveness of its development and the reliability of the energy supply to the production sites.
The fuel is natural gas, for its supply to the turbines there are strict requirements for purity (impurity content no more than 0.1 mg / m3), temperature (+60 ... +80°C), pressure (4.5 ... 5 MPa), and flow rate (21,540 Nm3 / h). The respective parameters are guaranteed by the ENERGAS system – a gas-booster station, composed of 4 compressor units (CU), and a block-type gas treatment station (BGTS).
Effective monitoring, control and safe operation of this process equipment are ensured by a two-tier ACS of gas feeding (ACS GF) integrated into the APCS of the power supply complex. First tier is the local control systems placed in special compartments inside the block-modules BGTS and CU. The second tier includes a general control cabinet, an operator workstation (WKS), and an emergency shutdown console located in the dispatch room of the power supply complex. ACS GF is made based on microprocessor technology, using modern software, switching equipment, channels and protocols of communication.
 ЭСН-НиГ/845-11.jpg "Gas treatment and gas supply system for the Yarega gas-turbine power supply complex")
The ENERGAS Group is increasing its contribution to hydrocarbon production's energy supply with new projects of fuel gas treatment for power supply complexes of fields.
Ensuring the energy autonomy of fields is a complex task that involves: developing and implementing unique engineering solutions, analysis of reliability and environmental friendliness, assessment of efficiency, economic and technical risks, selection rationale of generation and technological equipment, and focus on the quality of fuel gas.
WHY AUXILIARY POWER SUPPLY COMPLEX IS NECESSARY
The need to create an auxiliary power supply complex (APSC) for a particular field is due to the primary and accompanying reasons. Among them:
- Costs of energy supply and heat are comparable to the costs of building your power plant (new construction);
- Problems with regional power grids or with the cost of additional electricity (capacity expansion);
- Availability and quality of electricity, critical for the technological process continuity or fraught with irregularities in the procedure;
- Fines for emissions of associated petroleum gas and other products into the atmosphere, which are comparable to the cost of power plant equipment;
- Possibility of using cheap or own "free" gas as fuel for the power plant;
- Constant expectation of an increase in electricity tariffs;
- Remoteness of the field from utilities, which complicates the transportation of hydrocarbon raw materials.
APSC AS THE BASIS OF ENERGY EFFICIENCY
The power supply complex works on the energy efficiency of oil and gas production, helping the owner to solve the following tasks:
- Electricity base-load provision in conditions of network constraints;
- Thermal power generation for fields facilities;
- Meeting process needs for hot water and steam for injection into reservoirs;
- Reducing the energy resources consumption costs;
- Decrease of the enterprise's dependence on the tariff policy in the electricity market;
- Growth in the volume of rational use of associated petroleum gas.
However, problems are associated with the complexity of the construction of power supply complexes in remote fields, ensuring environmentally friendly generation and supplying excess electricity to the general grid.
GRPP OR GTPP?
The most common generator drives for decentralized power plants are gas-reciprocating engines (GRE) and gas-turbine engines (GTE). When choosing between them, the owners of future APSCs first ask questions of fuel consumption and operating costs associated with the achievement of benefits and the payback period of the equipment.
It should be noted that the specific fuel consumption per kWh generated is lower for a gas-reciprocating unit and at any load mode (Figure 1). This is explained by the fact that reciprocating machines' efficiency is 36 ... 45%, and for gas turbines (in a simple cycle) – 25 ... 34%.
Comparing operating costs for gas-reciprocating and gas-turbine power plants also speaks in favour of the former – they are lower for GRPPs (Figure 2). Major overhauls of the turbine are marked with sharp jumps on the GTPP graph. GRPP’s overhauls require significantly less financial and human resources.
Figure 1. Specific fuel consumption of gas-reciprocating and gas-turbine engines Figure 2. Operating costs for a 5 MW power plant
It would seem that the choice is obvious. But GRE and GTE are compared according to many criteria, including durability, maintainability, the influence of live load, placement in the building, frequency and localization of maintenance, environmental friendliness, etc. In Russian conditions, import substitution also plays an essential role in the choice of generating equipment.
Experts believe that gas turbines are more profitable in large fields with a developed infrastructure that has significant (over 20 MW) electrical loads. The owner's thermal power needs are also taken into account, which is provided by GTPPs operating in the cogeneration cycle.
On the other hand, gas-reciprocating units are more promising for power supply complexes of small fields and temporary APSC operating in the initial field infrastructure development period.
Expert data indicate that the fields' energy autonomy is still in demand – in 2020 alone, 11 APSCs (8 gas-reciprocating and 3 gas-turbine) were commissioned in Russia. In 2021, it is planned to launch another 15 power plants (10 GRPP and 5 GTPP).
FUEL FOR APSC
Associated petroleum gas is the most common fuel for the APSC of the fields, which is due to the high efficiency of this method of rational utilization of the produced APG and the absence of costs for advanced refining of "difficult" hydrocarbon raw materials.
There are power supply complexes that use natural gas as fuel. Such APSCs are being built, for example, in fields where the demand for electric and thermal energy is high, and the own APG reserves are insufficient for long-term operation or complete utilization of turbines. Sometimes such a deficit is made up for by the "forwarding" of the feed thread from the nearest field with excess volumes of associated gas, but this supplements the existing experience.
There are interesting projects of autonomous power plants using different types of fuel at different stages of operation. Some fields' infrastructure, especially remote and inaccessible ones, are not immediately developed to supply the APSC with associated gas, and natural gas is temporarily used. The field receives the necessary volumes of its energy, and upon reaching a certain level of infrastructure development, the correct transition of the power supply complex to APG occurs.
For instance, this path was taken by the Vatyegan GTPP and the northernmost mainland GTPP – East-Messoyakha. In case of interruptions in the supply or depletion of APG reserves, the existing APSCs can again switch to natural gas since the infrastructure was prepared from the outset for this case.
COMPREHENSIVE TREATMENT OF FUEL GAS
The treatment of fuel gas (regardless of its type) is a indispensable technological process required for the systematic, efficient and reliable operation of power supply complexes.
It should be noted that the ENERGAS Group has supplied and commissioned gas treatment equipment for 26 APSC built by LUKOIL, Surgutneftegas, Gazprom Neft, Rosneft and others. Fuel here is treated for 111 gas-reciprocating and gas-turbine power plants with a total capacity of 1,163 MW (Figure 3).
Figure 3. Generating units as part of the fields’ APSC, conjugated with the ENERGAS units
There are fuel gas treatment stations, booster compressor stations, multimodule gas treatment facilities, and gas-control stations at the fields. ENERGAS process units provide the fuel gas's design parameters for the modern generating equipment of leading Russian and foreign manufacturers.
Units intended for work as part of power supply complexes of fields are designed and manufactured considering the operating conditions, composition, quality and characteristics of the source gas, type and capacity of conjugated gas-consuming gensets, process tasks, and particular project requirements.
Gas treatment equipment is fully automated and aimed for intensive operation mode. It is supplied in a container (mono-, double-blocks), intra-shop (hangar) and multi-module versions, in an easy-to-assemble enclosure or on an open frame. The range of unit capacity of the units is from 500 to 150,000 m3 / h.
Units of various purpose can be combined and merged into systems for comprehensive gas treatment and fuel supply. Such systems provide purification, drying, heating, compressing (or pressure reducing), analysis of component composition, process or commercial metering of a gas entering the power supply complex site.
Additionally, quality control is carried out – measurement of various parameters of the gas fuel treated and supplied to the gensets: the content of impurities, humidity, temperature, density, pressure, calorific value (combustion heat).
EXAMPLES OF ASSOCIATED GAS TREATMENT FOR APSC
APG treatment facility for gas-reciprocating power supply complex of Barsukovskoye field
Barsukovskoye field in Yamal-Nenets Autonomous Area is developed by LLC RN-Purneftegaz (Rosneft). Since 2019, this field's infrastructure and process facilities receive electricity from an autonomous power supply complex consisting of 10 Cummins gas-reciprocating units (GRU) of type C1540 N5C with a capacity of 1.5 MW each.
The ENERGAS fuel gas treatment facility prepares the locally recovered associated petroleum gas before supplying it in the GRU. This FGTF provides the design parameters of fuel in terms of temperature (+20 ... +30°C), pressure (0.3 MPa), flow rate (1,250 ... 5,000 m3 / h) and purity (purification efficiency is 100% for liquid fraction and 99.9% for solid particles larger than 2 microns).
The FGTF is a multifunctional complex, which comprises: a gas filtration system with two-stage coalescing filters, a subassembly of condensate gathering and storage with an underground drainage tank, a unit of commercial gas metering with ultrasonic flow meters, a two-line reduction system, a gas heating module based on a shell-and-tube heat exchanger.
The process flow scheme of facility includes modular boiler room (MBR) with a total useful thermal capacity of 0.19 MW. Integrated MBR prepares intermediate heat carrier for gas heating subassembly and consists of 2 water-heating boilers – working and standby (for low flow rate). In addition to the main process function, MBR simultaneously provides the own needs of the FGTF – the generated heat is also heating its premises.
Comprehensive gas treatment system for GTU-CHPP at Usinsk field
The own power supply complex of LLC LUKOIL-Komi was created based on GTU-CHPP with an electrical capacity of 100 MW and a thermal capacity of 120 Gcal / h. GTU-CHPP is 4 power units, each of which includes a GTE-25PA gas turbine unit and a waste-heat boiler. Today, the possibilities of the Usa power supply complex make it possible to develop production at the fields of the Denisovskiy licensed area.
The design parameters of gas fuel are provided here by the ENERGAS multifunctional system – associated gas treatment station (AGTS) and booster compressor station (BCS) composed of three units.
AGTS carries out separation and filtering of common APG flow, heating and pressure reduction of gas for the boiler house of the power supply complex, as well as the measurement of the volume of fuel, separately reaching to GTUs and boiler house. After preliminary treatment, the gas intended for the power units is directed to the BCS, which compresses it and feeds to the turbines.
The feature of this project is the high content of liquid fractions in the APG. The required fuel values for humidity are achieved in several stages. At first, the associated gas enters the AGTS separator-slugcatcher, where the primary separation is underway, and the peak liquid injection are neutralized. Then gas passes through coalescing filters of AGTS and filters-scrubbers of BCS.
At the final stage, the method of recuperative heat exchange is used – each compressor unit is equipped with a gas drying module operating in temperature recovery mode. For this purpose, a chiller and a heater are integrated into the delivery line, which form an interim circuit and successively cool the gas, separate and remove the condensate, and heat the gas. The fuel dried in this way is fed to the turbines of the power supply complex with a temperature of 20°C above the dew point.
EXAMPLES OF NATURAL GAS TREATMENT FOR APSC
Fuel gas treatment facility for GTPP and facilities of CGCTP at the East-Urengoy licensed area
At the East-Urengoy area of JSC Rospan International (Rosneft), the complex gas and condensate treatment plant (CGCTP) operates. In 2020, the fuel gas treatment facility (FGTF) was integrated into its structure and brought to full design capacity.
FGTF ENERGAS performs filtering, flow measurement, heating, pressure reducing of gas and supplies it to the primary and auxiliary facilities of CGCTP. Among them: boiler house, flare unit, intake flow lines, burner for combustion of industrial wastes, booster compressor station of low-pressure gases, technical propane-butane purification unit from methanol, low-temperature separation unit, methanol recovery unit, condensate stabilization unit. Note that for each consumer, the gas is supplied with individual parameters.
An essential function of the FGTF is the fuel supply of a new gas turbine power plant for own needs with a capacity of 105 MW, built on the CGCTP site. This GTPP composed of seven Titan 130 turbines (Solar) provides electricity for the facilities of production, processing and transportation of oil, gas and gas condensate located on East Urengoy.
The FGTF consists of the main and standby fuel gas treatment modules (FGTM) which are separate buildings composed of several process block-boxes. FGTM-1 guarantees the needs of 100% of CGCTP consumers. FGTM-2 starts the operation when the main module is stopped and supplies gas fuel to the GTPP and the boiler house. The capacity of the modules is 90,400 and 32,612 Nm3 / h, respectively.
Gas treatment and gas supply system for the Yarega gas-turbine power supply complex
The Yarega power supply complex, built by LUKOIL-Energoengineering LLC, is another facility of own generation in the Komi Republic. It includes three GTPP-25PA gas-turbine power units (JSC UEC-Aviadvigatel) with a total capacity of 75 MW. For the heat output, three waste-heat boilers with a total steam productivity of 121 t / h were installed here.
The possibilities of the power supply complex provided the growing needs for electricity and steam of the strategic Yarega oil and titanium field, increased the effectiveness of its development and the reliability of the energy supply to the production sites.
The fuel is natural gas, for its supply to the turbines there are strict requirements for purity (impurity content no more than 0.1 mg / m3), temperature (+60 ... +80°C), pressure (4.5 ... 5 MPa), and flow rate (21,540 Nm3 / h). The respective parameters are guaranteed by the ENERGAS system – a gas-booster station, composed of 4 compressor units (CU), and a block-type gas treatment station (BGTS).
Effective monitoring, control and safe operation of this process equipment are ensured by a two-tier ACS of gas feeding (ACS GF) integrated into the APCS of the power supply complex. First tier is the local control systems placed in special compartments inside the block-modules BGTS and CU. The second tier includes a general control cabinet, an operator workstation (WKS), and an emergency shutdown console located in the dispatch room of the power supply complex. ACS GF is made based on microprocessor technology, using modern software, switching equipment, channels and protocols of communication.
The ENERGAS Group is increasing its contribution to hydrocarbon production's energy supply with new projects of fuel gas treatment for power supply complexes of fields.