Maydl' T.V.

maydl@geo.komisc.ru

Graduated from Leningrad State University (1975), specialization "geochemistry".
PhD in Geological and Mineralogical Sciences, Associate Professor.
Senior Researcher of Institute of Geology of Komi Science Centre of the Ural Branch of the Russian Academy of Sciences (IG FRC Komi SC UB RAS).
Area of scientific interests: lithology and geochemistry of carbonate deposits in connection with the genesis and structure of carbonate hydrocarbon reservoirs.
Author of more than 70 publications.
Regional petroleum geology
Article # 22_2024 submitted on 06/21/2024 displayed on website on 08/22/2024
21 p.
pdf The influence of the reservoir brines composition on epigenetic changes in the Upper Silurian-Lower Devonian carbonate rocks of the Gambutsev swell (Timan-Pechora petroleum province)
The results of a comprehensive interpretation of lithological and geochemical studies of core material and modeling of geochemical interaction processes in the formation water-rock system for Lower Paleozoic productive strata of the Gamburtsev swell Varandey-Adzva tectonic zone are presented. The effects of sodium chloride brines on carbonate, sulfate-carbonate rocks are discussed for the first time. The calculations of the degree of saturation of waters in relation to carbonate and sulfate minerals and their comparison with the epigenetic mineralization of rocks allowed us to identify the main processes contributing to the formation of neo-minerals in the Lower Paleozoic reservoir. As a result, new data were obtained that contribute to a more accurate prediction of the reservoir properties of rocks of the Lower Paleozoic carbonate strata in the north-east of the Timan-Pechora petroleum province.

Keywords: carbonate rock, sulfate-carbonate rock, reservoir sodium chloride brines, epigenetic change, Gamburtsev swell, Varandey-Adzva tectonic zone, Timan-Pechora petroleum province.
article citation Maydl' T.V., Mityusheva T.P., Ul'nyrov I.L., Nechaev M.S. Vliyanie sostava plastovykh rassolov na epigeneticheskie izmeneniya verkhnesiluriysko-nizhnedevonskikh karbonatnykh porod vala Gamburtseva (Timano-Pechorskaya neftegazonosnaya provintsiya) [The influence of the reservoir brines composition on epigenetic changes in the Upper Silurian-Lower Devonian carbonate rocks of the Gambutsev swell (Timan-Pechora petroleum province)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2024, vol. 19, no. 3, available at: https://www.ngtp.ru/rub/2024/22_2024.html EDN: BOOZTS
References
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Maydl' T.V. Litologiya i kollektory produktivnykh karbonatnykh otlozheniy nizhnego devona vala Gamburtseva [Lithology and reservoirs of productive carbonate strata of the Lower Devonian of the Gamburtsev swell]. Geologiya i resursy goryuchikh iskopaemykh evropeyskogo Severa SSSR, Syktyvkar: KF AN SSSR, 1989, pp. 34-46. (In Russ.).
Maydl' T.V., Zhemchugova V.A., Naumchev Yu.V. Geokhimicheskie predposylki vydeleniya predfranskogo nesoglasiya v devonskom razreze Timano-Pechorskogo osadochno-porodnogo basseyna [Geochemical prerequisites for the isolation of the pre-Frasnien unconformity in the Devonian section of the Timan-Pechora sedimentary rock basin]. Vestnik Instituta geologii Komi NTs UrO RAN, 2018, no. 285(9), pp. 30-38. (In Russ.). DOI: 10.19110/2221-1381-2018-9-30-38
Nikonov N.I., Bogatskiy V.I., Martynov A.V., Larionova Z.V., Laskin V.M., Galkina L.V., Dovzhikova E.G., Ermakova O.L., Kostygova P.K., Kuranova T.I., Moskalenko K.A., Pankratov Yu.A., Petrenko E.L., Popova E.V., Surina A.I., Shabanova G.A. Atlas geologicheskikh kart «Timano-Pechorskiy sedimentatsionnyy basseyn». Masshtab 1:2500000 [Atlas of geological maps "Timan-Pechora sedimentary basin". Scale 1:2500000]. Ukhta: TP NITs, 2000, 63 p. (In Russ.).
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Ul'nyrov I.L., Maydl' T.V. Litologiya, usloviya osadkonakopleniya i formirovanie porod-kollektorov verkhnesiluriyskikh karbonatnykh otlozheniy vala Gamburtseva (Timano-Pechorskaya neftegazonosnaya provintsiya) [Sedimentation conditions, petrography and formation of reservoir rocks of the Upper Silurian Carbonate strata of the Cherpayu area on the Gamburtsev Swell (Timan-Pechora petroleum province)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2023, vol. 18, no. 3, available at: http://www.ngtp.ru/rub/2023/26_2023.html (In Russ.). EDN: ZQRFWL
Zhemchugova V.A., Maslova E.E. Vtorichnaya dolomitizatsiya kak faktor, opredelyayushchiy kollektorskie svoystva nizhnedevonskikh otlozheniy vostochnogo borta Khoreyverskoy vpadiny (Timano-Pechorskiy neftegazonosnyy basseyn) [Secondary dolomitization as a factor determining the reservoir properties of the Lower Devonian sediments of the eastern side of the Khoreyver depression (Timan-Pechora petroleum basin)]. Vestnik Moskovskogo universiteta. Seriya 4: Geologiya, 2020, no. 3, pp. 47-56. (In Russ.).
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Zytner Yu.I., Chibisova V.S. Gidrogeologicheskie kriterii prognoza neftegazonosnosti severnykh rayonov Timano-Pechorskoy neftegazonosnoy provintsii [Hydrogeological criteria for petroleum potential forecast (northern areas of Timan-Pechora petroleum province)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2013, vol. 8, no. 3, available at: http://www.ngtp.ru/rub/4/35_2013.pdf (In Russ.). DOI: 10.17353/2070-5379/35_2013
Stratigraphy and lithology
Article # 26_2023 submitted on 05/19/2023 displayed on website on 08/01/2023
36 p.
pdf Sedimentation conditions, petrography and formation of reservoir rocks of the Upper Silurian Carbonate strata of the Cherpayu area on the Gamburtsev Swell (Timan-Pechora petroleum province)
This article presents the results of studies of poorly investigated Upper Silurian carbonate strata of the Gamburtsev Swell using the Cherpayu area as an example. Methods of lithofacies analysis, scanning electron microscopy, data of petrophysical and geophysical studies of wells were used. In the Upper Silurian strata, nine microfacies types have been identified that characterize four facies’ zones: 1) littoral and flooded coast, 2) shelf lagoon, 3) shallow-water shelf zone, and 4) shallow sublittoral open shelf environments. Reconstruction of Late Silurian sedimentation showed that sediments accumulation in the Ludlowian time occurred mainly in the accumulative silty littoral conditions, and in the Pridolian time, in the conditions of the shallows on the open sea basin, where carbonate sands and small bioherms accumulated.
Five petrotypes of reservoir rocks have been identified, differing in structural (crystal size) and petrophysical (porosity and permeability) properties. The best properties of porosity and permeability are found in dolomites with a grain size of 20-100 µm, with a shady microbial clot structure, which is characteristic of “algae laminites” (petrotypes 1 and 2). Voidness is cavity-porous-fracture with a predominance of secondary leaching voids. A successive series of important stages in the reservoirs formation of the Upper Silurian in the Cherpayu area of the Gamburtsev Swell was identified: 1) the stage of sedimentation and diagenesis, which ensured primary voidness; 2) the stage of the Middle Devonian structural transformation and the regional pre-Upper Devonian hiatus, which is associated with the formation of surface (epigene) karst, which is not currently functioning, and 3) the stages of the Ural and Pay-Khoy tectonic phases, which ensured the activation of ascending fluid flows and the development of localized and diffusely manifested porosity deep hypogene karst.

Keywords: Carbonate Upper Silurian sedimentation, formation reservoir rocks, Cherpayu area, Gamburtsev Swell, Timan-Pechora petroleum province.
article citation Ul'nyrov I.L., Maydl' T.V. Litologiya, usloviya osadkonakopleniya i formirovanie porod-kollektorov verkhnesiluriyskikh karbonatnykh otlozheniy vala Gamburtseva (Timano-Pechorskaya neftegazonosnaya provintsiya) [Sedimentation conditions, petrography and formation of reservoir rocks of the Upper Silurian Carbonate strata of the Cherpayu area on the Gamburtsev Swell (Timan-Pechora petroleum province)]. Neftegazovaya Geologiya. Teoriya I Praktika, 2023, vol. 18, no. 3, available at: http://www.ngtp.ru/rub/2023/26_2023.html EDN: ZQRFWL
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   Yur'eva Z.P. Polozhenie zalezhey nefti v razrezakh nizhnedevonskikh otlozheniy (Timano-Pechorskaya provintsiya) [Position of oil pools in the sections of the Lower Devonian strata (the Timan-Pechora province)]. Geologiya nefti i gaza, 2015, no. 3, pp. 3-13.
   Zhemchugova V.A. Aktual'nye nauchno-tekhnicheskie problemy razvitiya geologo-geofizicheskikh, poiskovo-razvedochnykh i promyslovykh rabot v Respublike Komi [Actual scientific and technical problems of the development of geological and geophysical, prospecting, exploration and fishing operations in the Komi Republic]. Moscow: Izdatel'stvo MGGU, 2002, 243 p.
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Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 32_2020 submitted on 07/29/2020 displayed on website on 09/30/2020
21 p.
pdf Void space structures inside Silurian carbonate rocks of northeast Timan-Pechora petroleum province
This work presents the results of a comprehensive study of the structure of the void space of low-capacity Silurian carbonate reservoires in the northeastern regions of Timan-Pechora petroleum province. The morphology of void spaces is shown, the porous medium and channels are described and their relationship with each other. The conducted research shows the complex multicomponent nature of the reservoir void spaces due to the presence of various types of voids: primary matrix intercrystalline and interform porosity, secondary micro- and macrocavernosity and fracture providing void spaces. Their typification will allow a differentiated approach to the assessment of oil and gas reserves and create a detailed geological basis for the design of a rational development system.

Keywords: reservoir void space, matrix porosity, microfracture, Silurian carbonate rock, Timan-Pechora petroleum province.
article citation Dan'shchikova I.I., Maydl' T.V., Zhuravlev A.V., Ryazanov K.P. Struktura pustotnogo prostranstva v siluriyskikh karbonatnykh porodakh severo-vostoka Timano-Pechorskoy provintsii [Void space structures inside Silurian carbonate rocks of northeast Timan-Pechora petroleum province]. Neftegazovaya Geologiya. Teoriya I Praktika, 2020, vol. 15, no. 3, available at: http://www.ngtp.ru/rub/2020/32_2020.html
DOI https://doi.org/10.17353/2070-5379/32_2020
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Regional petroleum geology
Section editor – PhD in geology and mineralogy Makarevich V.N.
Article # 44_2019 submitted on 10/16/2019 displayed on website on 12/19/2019
20 p.
pdf Carbonate rocks epigenetic changes and their connection with chemical composition water of Upper Ordovician-Lower Devonian petroleum bearing area of the Chernyshev Ridge and eastern side of the Khoreyver Depression
We presented results of a complex interpretation of core material and chemical composition of waters for Lower Paleozoic (O3-D1) section of the junction zone of the Khoreyver Depression and Chernyshev Ridge. We for the first time discussed influence of Cl-Na and Cl–Na–Ca brines on carbonate, carbonate-sulfate rocks and the processes of formation of new minerals in the O3-D1 reservoir of the petroleum bearing area. The calculations of degree of water saturation with respect to carbonate and sulfate minerals and their comparison with catagenetic mineralization allowed and show main reasons for the formation of mineral new structures. As a result, additional data were obtained that contributed to the prediction of the reservoir properties of the Lower Paleozoic carbonate section in the northeastern part of the Timan-Pechora petroleum province.

Keywords: carbonate and carbonate-sulfate rocks, post-sedimentation changes, formation water, brines, Chernyshev Ridge, Khoreyver Depression, Timan-Pechora petroleum province.
article citation Danshikova I.I., Maydl T.V., Mityusheva Т.P. Epigeneticheskie izmeneniya karbonatnykh porod i ikh svyaz' s khimicheskim sostavom vody v verkhneordoviksko-nizhnedevonskom neftegazonosnom komplekse gryady Chernysheva i vostochnogo borta Khoreyverskoy vpadiny [Carbonate rocks epigenetic changes and their connection with chemical composition water of Upper Ordovician-Lower Devonian petroleum bearing area of the Chernyshev Ridge and eastern side of the Khoreyver Depression]. Neftegazovaya Geologiya. Teoriya I Praktika, 2019, vol. 14, no. 4, available at: http://www.ngtp.ru/rub/2019/44_2019.html
DOI https://doi.org/10.17353/2070-5379/44_2019
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Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 20_2019 submitted on 05/17/2019 displayed on website on 06/28/2019
21 p.
pdf Formation genesis of Silurian reservoirs belonging to the central part of the Chernyshev Ridge
The lithology of Silurian rocks, poorly studied by drilling in the area of strong dislocations occuring in the central part of the Chernyshev Ridge (Timan-Pechora petroleum basin) was investigated. The methods of the litho-facial analysis, analysis of the GIS data, and petrophysical analysis were used. The facial model according to which the territory of the central part of Chernyshev Ridge in Silurian time was located in a border area between tough Bolshezemlya and plastic Kosyyu-Rogov base blocks and can be carried to situations of a ramp slope of the Bolshezemlya raising is proposed. Predictabilities of deposits formation are compared with features of the reservoir volumetric capacity. The most part of the studied samples of a core are characterized by low reservoir properties. The most perspective for formation of reservoir are the facies of carbonate shallows zones with a high share of primary porosity having the best collector properties.

Keywords: facial model, Silurian rock, sedimentation conditions, reservoir, Chernyshev Ridge, Timan-Pechora petroleum basin.
article citation Danshikova I.I., Maydl T.V. Usloviya formirovaniya porod-kollektorov siluriyskikh otlozheniy tsentral'noy chasti gryady Chernysheva [Formation genesis of Silurian reservoirs belonging to the central part of the Chernyshev Ridge]. Neftegazovaya Geologiya. Teoriya I Praktika, 2019, vol. 14, no. 2, available at: http://www.ngtp.ru/rub/2019/20_2019.html
DOI https://doi.org/10.17353/2070-5379/20_2019
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Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 5_2017 submitted on 10/06/2016 displayed on website on 02/22/2017
15 p.
pdf  Micromorphology of the free spacees of the carbonate reservoirs of the north of Timan-Pechora Basin
The article presents the results of studying the structure of the Middle Ordovician-Lower Devonian carbonate complex in the north of the Timan-Pechora Basin. We examined the reservoir properties of the rocks by means of X-ray tomography, scanning electron microscopy, lithological and petrophysical method. We described of the porosity of the Silurian-Devonian deposits.

Keywords: computed microtomography, carbonate rocks, porosity, permeability, deposits of low-permeability reservoirs, Timan-Pechora Basin.
article citation Danshikova I.I., Maydl T.V., Zhuravlev A.V., Statsenko E.O., Filippov V.N. Mikromorfologiya pustotnogo prostranstva v karbonatnykh kollektorakh na severe Timano-Pechorskoy provintsii [Micromorphology of the free spacees of the carbonate reservoirs of the north of Timan-Pechora Basin]. Neftegazovaya Geologiya. Teoriya I Praktika, 2017, vol. 12, no. 1, available at: http://www.ngtp.ru/rub/2/5_2017.pdf
DOI https://doi.org/10.17353/2070-5379/5_2017
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