Recently, considerable attention in the world is given to the use of renewable energy sources. Among them geothermal waters are of great importance due to ecological safety and economic efficiency of their use. Russia has confirmed high potential of geothermal water resources, but today only a small proportion is used. One of the most promising areas for geothermal waters is the Chechen Republic, which is at the 3rd place among the Russian regions for approved operational reserves of geothermal waters deposits, the largest of which is the Khankala deposit.Achievement of the sustainability in geothermal waters resource development requires an integrated approach and an important role in solving the problems of exploitation of thermal waters is played by geostatistical analysis and estimation, as well as mathematical modelling. The adjusted structural map of the most productive layer (layer XIII) and a 3-D map of temperature distribution within the Khankala deposit were created using universal kriging. Results approved the importance of the structural-tectonic factor and movement of groundwater in the formation of the temperature regime of the territory. Modelling of the Khankala geothermal waters deposit exploitation allowed to make prognosis of temperature changes, to provide recommendations on injection-production wells location and distance between down holes and to explore possible further exploitation scenarios such as periodic use of different layers by doublet systems.The development of geothermal waters use has undoubted advantages – environmental friendliness and renewability. In order to develop this domain in the Chechen Republic the state support is needed. Issues are the lack of a special legislative framework and special insurance systems. Use of geothermal waters of the 14 explored deposits in Chechen Republic can be a significant contribution to local energy production and economic stability of the region while bringing the environmental benefits of traditional fuels partial replacement.The ...
Recently, considerable attention in the world is given to the use of renewable energy sources. Among them geothermal waters are of great importance due to ecological safety and economic efficiency of their use. Russia has confirmed high potential of geothermal water resources, but today only a small proportion is used. One of the most promising areas for geothermal waters is the Chechen Republic, which is at the 3rd place among the Russian regions for approved operational reserves of geothermal waters deposits, the largest of which is the Khankala deposit.Achievement of the sustainability in geothermal waters resource development requires an integrated approach and an important role in solving the problems of exploitation of thermal waters is played by geostatistical analysis and estimation, as well as mathematical modelling. The adjusted structural map of the most productive layer (layer XIII) and a 3-D map of temperature distribution within the Khankala deposit were created using universal kriging. Results approved the importance of the structural-tectonic factor and movement of groundwater in the formation of the temperature regime of the territory. Modelling of the Khankala geothermal waters deposit exploitation allowed to make prognosis of temperature changes, to provide recommendations on injection-production wells location and distance between down holes and to explore possible further exploitation scenarios such as periodic use of different layers by doublet systems.The development of geothermal waters use has undoubted advantages – environmental friendliness and renewability. In order to develop this domain in the Chechen Republic the state support is needed. Issues are the lack of a special legislative framework and special insurance systems. Use of geothermal waters of the 14 explored deposits in Chechen Republic can be a significant contribution to local energy production and economic stability of the region while bringing the environmental benefits of traditional fuels partial replacement.The present work was a contribution to the Khankala geothermal station project, which was successfully launched in the beginning of the 2016. The Khankala geothermal station represents a new stage in use of geothermal waters in the Northern Caucasus as it is the only Russian example of geothermal station with closed loop of production and injection wells ("doublet") with 100% reinjection of used fluid back into reservoir. ; Récemment, une attention considérable a été accordée dans le monde à l'utilisation des sources d'énergie renouvelables. Parmi celles-ci, les eaux géothermales sont d'une grande importance en raison de la sécurité écologique et de l'efficacité économique de leur utilisation. La Russie possède un fort potentiel de ressources confirmées en eau géothermale, mais aujourd'hui, seule une faible proportion est utilisée. L'un des territoires les plus prometteurs pour les eaux géothermales est la République Tchétchène, qui se trouve à la 3ème place parmi les régions russes pour les réserves opérationnelles approuvées de gisements d'eaux géothermales, parmi lesquelles la plus importante est le gisement de Khankala.Le développement durable des ressources en eaux géothermales exige une approche intégrée. L'analyse géostatistique et l'estimation, ainsi que la modélisation mathématique, peuvent jouer un rôle important dans la résolution des problèmes d'exploitation des eaux géothermales. La carte structurale estimée de la couche la plus productive (la couche XIII) et une carte 3-D de la distribution de la température dans le gisement de Khankala ont été créées en utilisant le krigeage universel. Les résultats ont montré l'importance du facteur structuraltectonique et du mouvement des eaux souterraines dans la formation du régime de température du territoire. La modélisation de l'exploitation des gisements géothermiques de Khankala a permis de prévoirl'évolution de la température, de fournir des recommandations sur l'emplacement des puits d'injection et la distance entre les impacts à la couche productive, et d'explorer d'autres scénarios d'exploitation comme l'utilisation périodique de couches par doublets.Le développement de l'utilisation des eaux géothermales présente des avantages incontestables: respect de l'environnement et renouvelabilité. Afin de développer ce domaine en République Tchétchène, le soutien de l'Etat est nécessaire. L'absence d'un cadre législatif adapté et de systèmes spéciaux d'assurance pose des problèmes. L'utilisation des eaux géothermales des quatorze gisements explorés en République Tchétchène peut constituer une contribution significative à la production locale d'énergie et à la stabilité économique de la région, tout en apportant des avantages environnementaux par le remplacement partiel des combustibles traditionnels.Le travail présenté ici est une contribution au projet de station géothermique de Khankala qui a été lancé avec succès au début de 2016. La station géothermique de Khankala représente une nouvelle étape dans l'utilisation des eaux géothermales dans le Caucase du Nord car il s'agit du seul exemple russe de station géothermique avec une boucle fermée de puits de production et d'injection ("doublet") et 100% de réinjection du fluide utilisé dans le réservoir.
Актуальность работы обусловлена возрастающим интересом к использованию возобновляемых источников энергии, среди которых особое значение принадлежит термальным подземным водам. Перспективность использования термальных вод обоснована их экологическими преимуществами. Вместе с тем экономические аспекты эксплуатации требуют изучения. Цель работы: технико-экономический анализ проекта по строительству геотермальной станции с циркуляционной схемой отбора тепла на базе Ханкальского месторождения термальных подземных вод Чеченской Республики. Методы исследования: расчет экономических показателей инвестиционной привлекательности проекта по строительству Ханкальской геотермальной станции на основе дисконтированных денежных потоков по следующим стандартным показателям: чистый дисконтированный доход, внутренняя норма доходности, срок окупаемости и дисконтированный срок окупаемости; изучение возможных рисков разработки ресурса термальных подземных вод Ханкальского месторождения и способов их минимизации; сравнительный анализ с экономическими показателями газовой котельной, мировым опытом реализации геотермальных проектов, включая рассмотрение государственных методов стимулирования разработки термальных подземных вод. Результаты. Доказана перспективность использования термальных подземных вод Чеченской Республики. Рассчитаны показатели инвестиционной привлекательности проекта по строительству Ханкальской геотермальной станции, а также аналогичных станций в пределах изучаемой территории, подтверждающие экономическую рентабельность эксплуатации данного ресурса. Рассмотрены преимущества разработки термальных подземных вод Чеченской Республики, а также основные риски, связанные с геотермальными проектами, и способы их минимизации. Дан прогноз по возможному замещению традиционных видов топлива при использовании термальных подземных вод исследуемой области. Разработаны рекомендации по содействию развитию геотермальной энергетики в России. ; The relevance of the discussed issue is caused by the growing interest in renewable energy, where geothermal waters have special significance. The prospects for using geothermal waters are proved by their environmental benefits. However, the economic aspects of exploitation need to be studied. The main aim of the study is the feasibility study of the project for constructing a geothermal plant with a circulating heat extraction scheme on the basis of the Khankala geothermal waters deposit of the Chechen Republic. The methods used in the study: calculation of the economic parameters of investment attractiveness of the project for constructing the Khankala geothermal plant based on discounted cash flows on the following standard criteria: net present value, internal rate of return, payback period and discounted payback period; study of the possible risks of the Khankala geothermal waters deposit development and ways to minimize them; comparative analysis with gas boiler, worldwide experience of geothermal projects implementation, including consideration of government incentives to stimulate the use of geothermal waters. The results. The authors have proved the prospects for geothermal waters use in the Chechen Republic, and calculated the indicators of investment attractiveness of the project for constructing the Khankala geothermal plant and similar stations within the study area, confirming the economic feasibility of using this resource. The paper considers the advantages of the development of geothermal waters of Chechnya, as well as the main risks associated with geothermal projects, and the ways to minimize them. The forecast for the possible substitution of fossil fuels by using geothermal waters of the study area is introduced. The recommendations to promote the development of geothermal energy in Russia are given.
