Improving the geometric topology of geothermal heat exchangers in oil bore-holes

Fyk, Мykhailo; Biletsky, Volodymyr; Ryshchenko, Ihor; Abbood, Mohammed

doi:10.1051/e3sconf/201912301023

Cited by 4 publications

(5 citation statements)

References 22 publications

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“…To increase the selection of geothermal heat to the column with water and gas in the well can also be installed additional side trunks with heat pipes [26,27].…”

Section: Research Results and Discussionmentioning

confidence: 99%

Geothermal heat use to eliminate hydrate formations in oil deposit injection wells

et al. 2021

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The article is devoted to an actual issue: the development of internal downhole heat exchangers technology to combat hydration in injection wells. Purpose: development of conceptual solutions for the use of geothermal coolant in the internal well heat exchanger of the injection well. A scheme of an internal downhole heat exchanger with a geothermal heat carrier has been developed, and includes a supply line of a geothermal carrier through the heat exchange surface of the injection well into the productive reservoir of the oil field. The scheme provides targeted utilization of thermobaric energy of a geothermal source to combat hydration in the injection well. A mathematical apparatus for describing the process of heat utilization and heat exchange in injection well is proposed. It is established that the capacity of one geothermal well discovered at the oil depths in the Dnipro-Donetsk basin is sufficient to eliminate hydration in 1-3 injection wells, and determines the feasibility of their joint work.

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“…To increase the selection of geothermal heat to the column with water and gas in the well can also be installed additional side trunks with heat pipes [26,27].…”

Section: Research Results and Discussionmentioning

confidence: 99%

Geothermal heat use to eliminate hydrate formations in oil deposit injection wells

et al. 2021

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“…Technological parameters and geometric topology of geothermal heat exchangers are also modifi ed. For example, in [10] the authors proposed approaches to improving the designs and network structures for heat-transfer media circulation in the bottom-hole space of oil-and-gas reservoirs. It is emphasized that the most effi cient use of thermal waters is achieved via an integrated approach, which provides the most complete cycle for application of water thermal potential in a number of technological processes, including residual and associated extraction of valuable industrial components from mine water.…”

Section: Introductionmentioning

confidence: 99%

Ecological estimation of installing geothermal systems on territories of closed coal mines

Kovrov¹,

Dereviahina²,

Sherstiuk³

2022

Nauk. visn. nat. hirn. univ.

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Purpose. To conduct an ecological estimation of calorific value for two alternative energy sources: traditional coal combustion and heat recovery from geothermal modules. Methodology. The methods of comparative analysis for environmental impact of energy production due to coal use in comparison with the alternative of using geothermal modules and heat pumps are used. The technique for gross emissions estimation from coal combustion processes for the conditions of Donbas mines and equivalent volumes of potential energy from heat pumps is applied. Findings. The ecological estimation of geothermal modules as alternative sources of thermal power on a territory of liquidated mines of Donbas is performed. A comparative estimation of the potential for thermal energy production by coal combustion and using geothermal modules is performed based on the analysis of average characteristics of coal in the Donetsk basin, as well as a calorific value of fuel. The parameters necessary for technical and economic estimation of the efficiency of implementing geothermal modules for providing alternative heat supply are calculated. Originality. For the first time, a comparative estimation of the potential for thermal energy production by coal combustion and using geothermal modules has been performed based on analysis of average coal characteristics in the Donetsk basin, as well as a calorific value of fuel. Equivalent mass of coal, which can be preserved due to the operation of geothermal modules for conditions of liquidated mines of Donbas and mines of Selydove group, is calculated according to the values of additionally obtained thermal power of geothermal modules Pth. Practical value. According to the calculations, the amount of geothermal power Uth from mine water in terms of equivalent mass of coal during the heating season is estimated as 7.63 1061.76 108MJ for open geothermal systems based on mine water discharge in Donbas; 0.49 1060.57106MJ for modules of geothermal circulation of Selydove group of mines. It is proven that the implementation of geothermal modules for thermal energy production in operating and closed coal mines is a promising environmentally friendly technology with long-term technological potential, economic and social benefits.

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“…As a heat-transfer medium, both a natural fluid or artificial liquid-gas mixtures (propane, butane, etc. [4]) can be used. Heat exchange of a heat-transfer medium upflow occurs in the productive bed, bottom-hole zone, bottom hole [4 -5] and in the underground columns [6,9].…”

Section: Introductionmentioning

confidence: 99%

Phenomenological model of an open-type geothermal system on the basis of oil-and-gas well

Fyk

Biletsky

2020

E3S Web Conf.

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This paper relates to mining-well technologies. A theoretical and methodological approach is proposed to modeling geothermal well systems, which includes the development of: principal technological scheme of a geothermal system; schemes of transformation and movement of energy and a heat-transfer medium; the geothermal system phenomenological model; analysis of subprocesses and obtaining their mathematical models and, on this basis, the mathematical model of the geothermal model as a whole. An example of an advanced open-type geothermal well system is studied, which is based on the oil-and-gas well with one loop of circulation and the parallel connection of heat pumps at characteristic points of the system. The subprocesses of the developed phenomenological model are analysed and the characteristic features of their mathematical description are revealed; in particular, it is substantiated that the redistribution of heat power entering from a fluid-saturated bed is substantially dependent on the lateral wellbore geometry. Another important feature is to model the downhole heat pump and the modes in the scheme as a whole, which is based on the mass flow rate of a heat-transfer medium in its circulation loop. A generalized formula is presented for the heat power of the analysed advanced geothermal well system.

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Improving the geometric topology of geothermal heat exchangers in oil bore-holes

Cited by 4 publications

References 22 publications

Geothermal heat use to eliminate hydrate formations in oil deposit injection wells

Geothermal heat use to eliminate hydrate formations in oil deposit injection wells

Ecological estimation of installing geothermal systems on territories of closed coal mines

Phenomenological model of an open-type geothermal system on the basis of oil-and-gas well

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