Improvement of technological-mathematical model for the medium-term prediction of the work of a gas condensate field

Resource evaluation of geothermal power plant under the conditions of carboniferous deposits usage in the Dnipro-Donetsk depression

“…On the basis of UkrNDIgaz Institute projects for the oil and gas deposits development and the results of works [11 -13], Table 1 shows the data of 32 oil-gas and gas condensate deposits in the DDD central and eastern area. The calculation of the thermal power is made according to the formulas from [2,13].…”

“…The calculation of the thermal power (axis of ordinates in Fig. 4, is also shown in the last column of Table 1) is made according to formulas (1 -2) [2] and with account of COP of heat pumps in geothermal systems (COP = 6 -6.2), as well as with account of the power efficiency of heat exchangers (49%) [14]. From Fig.…”

“…For geothermal power plants (GeoPP), even lower wellhead temperatures (40 -70 ºC) are sufficient. Multistage heat supply systems are built on the principles of cognitive technologies [1] in terms of simultaneous heat utilization and its distribution among consumers, extraction and intensification of hydrocarbon inflows, other extracting fluids [2]. The greatest development of these technologies was in the USA, Germany, Canada.…”

“…Capital costs for the GeoPP construction range currently from $ 1.500 to $ 2.500 per kilowatt of installed electric power, compared to a similar economic indicator for nuclear power plants and thermal power plants. The work [2] shows that the use of geothermal heat as a combination of heat and mass transfer processes with the production of hydrocarbons (cognitive-technological approach) is technically and economically profitable. It is shown in [4] that the temperatures of the coolant outlet flow from the Grobla deposit near Krakow reach more than 40 ºC when developing depths of only 900 m. The oil and gas wells survey in the south of Texas [5] have shown the possibility of obtaining up to 3.5 MW of thermal power for wells with a depth of about 3 km, with a circulation velocity of the secondary coolant 3 -5 m/s and pressures in the wells of 30 -40 bars.…”

Adaptive technique of the approximate estimation of technical and economic indicators of the development of the object of the exhausted gas condensate deposit

“…Як показано в [3], тепловий режим роботи ліфтових колон свердловин залежить від складу газу. Оскільки загальний теплогідравлічний режим ліфтингу також змінюється при зміні теплового режиму ліфтингу газу в свердловині, то врахування зміни складу газу також дуже важливе для врахування під час техніко-економічної оцінки розробки ГКР.…”