nznistuНауки о Земле и недропользованиеEarth sciences and subsoil use2686-99932686-7931Federal State Budget Educational Institution of Higher Education "Irkutsk National Research Technical University"10.21285/2686-9993-2023-46-1-6-19nznistu-267Research ArticleГеофизикаGeophysicsПоиск перспективных участков для разведки геотермальных ресурсов на основе комплексного анализа разрезов петро- и теплофизических свойств породSearch for promising locations to explore geothermal resources based on joint analysis of sections of petro- and thermophysical properties of rocksНенюковаА. И.NenyukovaA. I.

 Ненюкова Алёна Игоревна, студентка

г. Москва

 Alena I. Nenyukova, Student

Moscow 

nenyukovaai@mail.ruСпичакВ. В.SpichakV. V.

 Спичак Вячеслав Валентинович, доктор физико-математических наук, академик Российской академии естественных наук, заведующий Лабораторией методологии интерпретации электромагнитных данных

г. Троицк, г. Москва

 Vyacheslav V. Spichak, Dr. Sci. (Phys.-Math.), Academician of the Russian Academy of Natural Sciences, Head of the Laboratory of Electromagnetic Data Interpretation Methodology

Troitsk, Moscow

v.spichak@mail.ruРоссийский государственный геологоразведочный университет им. Серго ОрджоникидзеРоссияSergo Ordzhonikidze Russian State University for Geological ProspectingRussian FederationЦентр геоэлектромагнитных исследований – филиал Института физики Земли им. О.Ю. Шмидта РАНРоссияCenter for Geoelectromagnetic Research – branch of the Sсhmidt Institute of Physics of the Earth RASRussian Federation202307042023461619Copyright © Ненюкова А.И., Спичак В.В., 20232023Ненюкова А.И., Спичак В.В.Nenyukova A.I., Spichak V.V.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.nznj.ru/jour/article/view/267

Целью работы являлось выделение перспективных участков для разведки геотермальных ресурсов по результатам комплексного анализа разрезов петро- и теплофизических свойств пород. По результатам магнитотеллурических зондирований, проведенных в рассматриваемой геотермальной зоне ранее, и построенных двумерных моделей удельного сопротивления, пористости, проницаемости, температуры, теплопроводности и удельной теплоемкости выполнен комплексный кластерный анализ разрезов всех перечисленных параметров. По всем рассматриваемым параметрам построен кластерный разрез, который по существу является петро- теплофизическим «паспортом» изучаемого участка недр, каждый пространственный кластер которого характеризуется своим набором диапазонов значений рассматриваемых свойств. В геотермальной области Сульц-су-Форе (Франция) выделены два участка, перспективные для бурения разведочных скважин. Один из них соответствует найденному ранее и уже разрабатываемому резервуару петротермальной энергии. Второй расположен на глубинах 2–3 км в другой части разреза и может представлять интерес для проведения новых разведочных работ. Созданная таким образом информационная база является удобным инструментарием для интерактивного отбора участков, перспективных с точки зрения поиска тех или иных ресурсов, и построения так называемой «карты перспективности» участков поверхности для бурения разведочных скважин.

The purpose of the study is identification of locations promising for geothermal resource exploration based on the joint analysis of sections of petro- and thermophysical properties of rocks. Having conducted magnetotelluric sounding in the geothermal area under investigation and having built 2-D models of electrical resistivity, porosity, permeability, temperature, thermal conductivity and specific heat capacity, the authors performed a joint cluster analysis of sections of enumerated parameters. A cluster cross-section is constructed taking into account all the discussed parameters, which is essentially a petro- and thermophysical “passport” of the site under examination. Each cluster of the latter is characterized by its own set of property ranges. Two promising locations for drilling exploratory boreholes have been identified in the Soultz-sous-Forêts (France) geothermal area. One of them corresponds to the already developed reservoir of petrothermal energy, while another is located at the depths of 2–3 km in another part of the section and has a potential for future exploration works. The information base created on this basis is a convenient tool for interactive selection of sites promising for exploration of different deposits and building of a “prospectivity map” of surface sites for drilling exploration boreholes.

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The authors declare that there are no conflicts of interest present.