Category: Oil and Gas Geology

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PROSPECTS OF THE OIL AND GAS POTENTIAL OF THE NORTHERN YAVORIV AREA OF THE BILCHE-VOLYTSIA AREA OF THE FORECARPATHIAN (according to the results of comprehensive geophysical and geochemical research)

Home > Archive > No. 1–2 (193–194) 2024 > 69–80

Geology & Geochemistry of Combustible Minerals No. 1–2 (193–194) 2024, 69–80

https://doi.org/10.15407/ggcm2024.193-194.069

Stepan DUCHUK1, Sofiia MAKSYMUK2, Anatoliy GALAMAY3


1 Western-Ukrainian Geophysical Exploration Expedition, Lviv, Ukraine, e-mail: zugre@lviv.farlep.netInstitute of 2, 3 Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: 2 danaarsen@ukr.net; 3 galamaytolik@ukr.net

Abstract

A complex of geophysical and geochemical studies was carried out in the Bilche-Volytsia zone on the Northern Yavoriv area with the aim of detailing the geological structure of Mesozoic and Neogene deposits in the context of identifying oil and gas promising traps of various types and preparing them for deep drilling.

To solve the problem, the following studies were applied: seismic surveying by the common depth point method, electrical surveying by the method of sounding the formation of the field in the near zone, geochemical surveying by the method of gas discharge surveying.

The main resulting material of the performed geophysical and geochemical studies on the Northern Yavoriv area is a structural-tectonic model, seismic and seismogeological sections, maps of longitudinal resistances and geoelectrical sections, maps of geochemical parameters, mapping maps by types of research.

As a result of conducting seismic, electrical, and geochemical studies, the geological structure of the Northern Yavoriv area was detailed. Structural plans by stratigraphic levels are presented: Pre-Neogene surface, Tyrassian of the Badenian age suite, the top of the Lower Dashava subsuite of Sarmatian age, the top of Upper Dashava subsuites of Sarmatian age.

The Pre-Neogene surface is represented by deposits of the Upper Cretaceous and the Upper and Middle Jurassic ages. Along this horizon, there is a dip from the northeast to the southwest. The structural-tectonic model is complicated by thrusts, longitudinal shifts, normal and strike-slip faults, which divide the research area into separate blocks.

According to the structural constructions on the roof of the Tyrassian suite, against the background of the general rise of the horizon to the northeast in this part, a structural nose can be observed, which has a southeast extension.

A syncline can be traced along the Horodok flexure in the southwest along the horizons of the Lower Dashava subsuite and the roof of the Upper Dashava subsuite, within which there is a general coincidence of the structural plans of the mentioned horizons.

The difference in structural plans is observed in the area where the horizons adjoin the plane of the Horodok flexure.

The Northern Yavoriv structure of the semi-anticlinal type is mapped on the reflection seismic horizon of the roof of the Upper Dashava subsuite (VD-10). The structural and tectonic model of this horizon of the Northern Yavoriv area borders the Svydnytsia gas field through a syncline bend. According to the completed structural constructions along this horizon, as well as a complex comparison of methods, this area may represent a certain interest in terms of gas. It is recommended to drill well No. 1 on the Northern Yavoriv structure in order to search for Upper Dashava deposits.

Full Text

Keywords

structure, geoelectric section, geochemical anomaly, hydrocarbons, geological exploration works, Northern Yavoriv area

Referenses

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PROSPECTS FOR OIL AND GAS PRESENCE IN CARBONATE DEPOSITS OF SILURIAN AGE IN THE BEREZHANY-BUCHACH ZONE OF TECTONIC DISLOCATIONS OF VOLYN-PODILLIA AREA

Home > Archive > No. 1–2 (193–194) 2024 > 50–68

Geology & Geochemistry of Combustible Minerals No. 1–2 (193–194) 2024, 50–68

https://doi.org/10.15407/ggcm2024.193-194.050

Svitlana HARASYM, Yaroslav LAZARUK

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: igggk@mail.lviv.ua

Abstract

The Berezhany-Buchach zone of local uplifts belongs to the Podillia promising district, located in the southern part of the Volyn-Podillia oil and gas region. Most of the local structures of the district are genetically related to tectonic disturbances. The structuring factor of the Berezhany-Buchach zone of tectonic dislocations is a fault of subregional extension, probably of a reverse-thrust character. Organogenic structures of the Silurian age are spatially connected with it. According to the results of lithologic-facies studies, they were deposited in lagoon-shelf conditions in a narrow strip 15–40 km wide, which stretches from the border with Romania in the southeast to the border with Poland in the northwest. According to the predominance of the remains of organisms, coral, stromatopore, crinoid, ostracod, brachiopod and algal species are distinguished among carbonates. They are recrystallized as a result of epigenetic processes. The reservoir rocks are composed of silty-detrital limestones, dolomitized limestones, and dolomites. There are both porous and cavernous, as well as fissure-pore and fissure-cavern collectors. Primary porosity is caused by voids inside and between organisms, and secondary capacity is caused by recrystallization, dolomitization, leaching, cavernous and fissure formation. The open porosity of carbonates varies on average from 4 to 16 %, permeability – from 0.01 to 2 mD. In the southeastern direction, the collector properties of carbonates deteriorate. Industrial deposits of hydrocarbons in the Silurian carbonates of Volyn-Podillia have not been established, however, numerous oil and gas occurrences were recorded during drilling. Based on the materials of lithologic and facies studies, the results of studying the reservoir properties of reservoir rocks, seismological and magnetometric constructions, and data from surface geochemical studies, the probable Berezhany, Dobrovoda, and Buchach objects were identified, their resource base was estimated at 48.6 million tons of oil and 1.3 billion m3 of dissolved gas, and the tasks for 3D seismic exploration were substantiated for the purpose of preparing the mentioned objects for exploratory drilling for oil and gas.

Full Text

Keywords

oil, deposit, oil traps, carbonate reservoir, hydrocarbon reserves

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ON THE PERSPECTIVES OF OIL AND GAS BEARING OF THE PALEOCENE DEPOSITS OF THE BEREHOVA AND ORIV UNITS OF THE UKRAINIAN CARPATHIANS

Home > Archive > No. 1–2 (193–194) 2024 > 32–49

Geology & Geochemistry of Combustible Minerals No. 1–2 (193–194) 2024, 32–49

https://doi.org/10.15407/ggcm2024.193-194.032

Halyna HAVRYSHKIV

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: galinah2404@gmail.com

Abstract

On the basis of the analysis of the occurrence of the main Paleocene lithological complexes of the Berehova and Oriv units of the Ukrainian Carpathians, four areas with different distribution of sandstones, siltstones and mudstones were distinguished. The selected areas are promising for the planning of oil and gas prospecting and for the increase of oil and gas reserves. Areas of distribution of lithologically sealed hydrocarbon traps are situated where sandstone formations occur. It is established that sandstones and siltstones of the Yamna suite are represented by both densely and poorly cemented varieties, which differ in cement composition, degree of cementation and porosity. The reservoir properties of the oil and gas bearing Paleocene sediments of the northwestern part of the study area were largely controlled by the factors that contributed to the preservation of high filtration and reservoir properties of the rocks at great depths – the thickness of the layers and the type of cementation of the clastic material. At the same time, the formation of the secondary pore space occurred due to the lithogenetic and tectonic fractures, as well as the decarbonization of sandstone and siltstone cement. The varying degrees of catagenetic changes in the rocks of the northwestern and southeastern parts of the study area indicate that tectonic processes had a significant impact on the lithogenesis of oil and gas bearing deposits and the formation of their reservoir properties.

It is revealed that the most prospective from the point of view of potential reservoir rocks occurrence in the sequence of the Yamna suite, which is represented mainly by sandstones, is the northwestern part of the study area, where the high reservoir properties of the oil- and gas-bearing Paleocene sediments are largely determined by the factors that facilitated their preservation in the rocks at great depths. These factors are the thickness of the layers and the type of cementation of the clastic material.

The complex of obtained results of investigations allowed allocation of the areas of potential reservoir rocks occurrence in the Paleocene sequence prospective for hydrocarbons accumulations.

Full Text

Keywords

Paleocene, Berehova and Oriv units, lithological complexes, petrographic composition of rocks, reservoir properties

Referenses

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Havryshkiv, H. Ya. (2019). Mineraloho-petrohrafichni osoblyvosti paleotsenovykh vidkladiv Berehovoi i Orivskoi skyb Ukrainskykh Karpat v aspekti yikh naftohazonosnosti [Extended abstract of Candidateʼs thesis, Institute of Geology and Geochemistry of Combustible Minerals of NAS of Ukraine]. Lviv. [in Ukrainian]

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DISTRIBUTION AND MATERIAL COMPOSITION OF THE DEVONIAN ORGANIC-RICH ROCKS OF THE VOLYN-PODILLIA PLATE

Home > Archive > No. 1–2 (193–194) 2024 > 22–31

Geology & Geochemistry of Combustible Minerals No. 1–2 (193–194) 2024, 22–31

https://doi.org/10.15407/ggcm2024.193-194.022

Natalia RADKOVETS1, Yuriy KOLTUN1, Andrii LOKTIEV2

1 Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: radkov_n@ukr.net
2 LLC “Institute of Geology R and D”, Kyiv, Ukraine

Abstract

The Volyn-Podillia plate is one of the main oil and gas-bearing regions of Ukraine. Despite numerous geological and geophysical studies of these territories, they still remain underexplored, and their oil and gas potential is underestimated. To date, two gas fields, Lokachynske and Velykomostivske, have been discovered within the boundaries of the Volyn-Podillia plate in the Middle Devonian sequence. Despite the established commercial gas bearing, the Devonian strata within the Volyn-Podillia plate are currently not sufficiently studied from the point of view of the occurrence of the organic-rich rocks in the section, which could generate hydrocarbons.

A significant amount of collected core material and geological-geophysical data from numerous wells within the research area made it possible to study the features of distribution and conduct a mineralogical-petrographic and geochemical study of Lower, Middle and Upper Devonian organic-rich rocks.

In the sediments of the Lochkovian stage of the Lower, Eifelian and Givetian stages of the Middle and Frasnian stage of the Upper Devonian, the organic-rich rocks have been established. They are represented by terrigenous, clayey and carbonate strata.

In the section of the Lower Devonian, they are represented by clay-carbonate and carbonate rocks within the Lochkovian stage. The organic carbon content in these rocks reaches 0.45 %. In the Middle Devonian, organic-rich rocks occur in sections of both the Eifelian and Givetian stages, being represented by terrigenous, clayey, and carbonate rocks. The organic carbon content in the rocks of the Eifelian stage reaches 0.65 %, and in the rocks of the Givetian stage – 2.34 %. In the sections of the Frasnian stage of the Upper Devonian, organic-rich rocks are represented by terrigenous, clayey and carbonate layers with organic carbon content of up to 1.43 %.

Given the occurrence of organic-rich rocks in the sections of the Lower (Lochkovian stage), Middle (Eifelian, Givetian stages) and Upper Devonian (Frasnian stage), these deposits can be considered as potentially oil and gas generating, which could have been a component of the Paleozoic petroleum system of the Volyn-Podillia plate.

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Keywords

Volyn-Podillia plate, Devonian, organic-rich rocks, mineralogical and petrographic composition of rocks, organic carbon content in rocks

Referenses

Chebanenko, I. I., Vishnyakov, I. B., Vlasov, B. I., & Volovnik, B. Ya. (1990). Geotektonika Volyno-Podolii. Kiev: Naukova dumka. [in Russian]

Kotarba, M. J., Więcław, D., Kosakowski, P., Wróbel, M., Matyszkiewicz, J., Buła, Z., Krajewski, M., Koltun, Y. V., & Tarkowski, J. (2011). Petroleum systems in the Palaeozoic-Mesozoic Basement of the Polish and Ukrainian parts of the Carpathian Foredeep. Annales Societatis Geologorum Poloniae, 81(3), 487–522. https://www.researchgate.net/publication/260564752

Krupskyi, Yu. Z., Kurovets, I. M., Senkovskyi, Yu. M., Mykhailov, V. A., Kurovets, S. S., & Bodlak, V. P. (2014). Netradytsiini dzherela vuhlevodniv Ukrainy: Vol. 2. Zakhidnyi naftohazonosnyi rehion. Kyiv: Nika-Tsentr. [in Ukrainian]

Pomyanovskaya, G. M. (1974). Stratigrafiya devona Volyno-Podolskoy okrainy Vostochno-Evropeyskoy platformy. In Stratigrafiya USSR: Devon (pp. 7–14, 36–83). Kiev: Naukova dumka. [in Russian]

Radkovets, N. (2016). Lower Devonian lithofacies and palaeoenvironments in the southwestern margin of the East European Platform (Ukraine, Moldova and Romania). Estonian Journal of Earth Sciences, 65(4), 207–220. https://doi.org/10.3176/earth.2016.18

Radkovets, N., & Koltun, Y. (2022). Dynamics of sedimentation within the southwestern slope of the East European platform in the Silurian-Early Devonian. Geodynamics, 1(32), 36–48. https://doi.org/10.23939/jgd2022.02.036

Radkovets, N., Kotarba, M., & Wójcik, K. (2017). Source rock geochemistry, petrography of reservoir horizons and origin of natural gas in the Devonian of the Lublin and Lviv basins (SE Poland and western Ukraine). Geological Quarterly, 61(3), 569–589. https://doi.org/10.7306/gq.1361

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REINTERPRETATION OF GEOLOGICAL DATA AS TO THE TECTONICS OF SEPARATE COVERS AND SUBCOVERS OF THE OUTER CARPATHIANS (in the context of prospects for oil and gas presence)

Home > Archive > No. 1–2 (193–194) 2024 > 5–21

Geology & Geochemistry of Combustible Minerals No. 1–2 (193–194) 2024, 5–21

https://doi.org/10.15407/ggcm2024.193-194.005

Volodymyr SHLAPINSKY, Myroslav PAVLYUK, Olesya SAVCHAK, Myroslav TERNAVSKY

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: igggk@mail.lviv.ua

Abstract

In spite of a number of preliminary investigations, the Ukrainian portion of the Outer Carpathians continues to be the object for scientific discussions of the modern geologists. Studied area is located in the Rakhiv district of the Transcarpathian Region in the upper stream of the right tributaries of the Tysa River: Mala Shopurka, Middle River and Kosiv. The following covers and subcovers of the Outer Carpathians participate in the geological feature (from souht-west to north-east): Burkut, Duklya, Duklya-Chornohora (Hoverla-Krasnoshora subcover) and Krosno (Bitlya-Svydovets subcover). This area was the study subject for geologists from different organizations. Its geological feature is restorated at modern maps of the Ukrainian Carpathians published relatively not long ago. One of them is geological map at a scale of 1 : 200,000 published at the Polish Geological Institute, Warsaw, in 2 stages in 2004 and 2007. The second group of maps at a scale of 1 : 200,000 of the Carpathian series was published under the aegis of the Ministry of Environmental Protection of Ukraine. It was fulfilled by the workers of NAC “Nadra Ukrainy” of the SE “Zakhidukrgeologia” of the Lviv and Transcarpathian Geological Research Expedition.

The object of our studying is located on the Nadvirna sheet of map, prepared for publication by the group of geologists under the leadership of B. V. Matskiv (2009). Both published maps contain insufficient information on the geological feature of the given plot of the Carpathians. Thus, the necessity has arisen to present the variant of geological map at a scale of 1 : 50,000 of our development. Such geological map was compiled mainly with usage of materials of geological surveying at a scale of 1 : 50,000 executed in 1981–1985 under the leadership of V. O. Vashchenko. Materials of over 1,000 exposures were analyzed. This has enabled us to reconstruct the geological feature of this region more precisely. Covering tectonics of the given area that was represented at the maps of precursors too, was verified and supplemented with the existence of a number of arterial fractures of strike-slip type, the existence of olistostrom horizons in the Upper Cretaceous deposits of the Hoverla-Krasnoshora subcover and Lower Cretaceous Burkut subcover.

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Keywords

covers, subcovers, fractures, flysch, tectonic, remnants, olistostrom, diabases

Referenses

Dabagyan, N. V., Lozynyak, P. Yu., Tsarnenko, P. N., & Shlapinskiy, V. E. (1987). Stratigrafiya, foraminifery i radiolyarii melovykh otlozheniy Chernogorskoy zony Sovetskikh Karpat. Doklady AN USSR, seriya B, 6, 77. [in Russian]

Danysh, V., Hnylko, O., Pavlyuk, M., Tsarnenko, P., Jankowski, L., Kopciowski, R., Ryłko, W., Anastasiu, N., Dragan, E., Popa, M., & Roban, R. (2007). Geological Map of the Outer Carpathians: Borderland of Ukraine and Romania. 1 : 200 000 (L. Jankowski, R. Kopciowski & W. Ryłko, Eds.). Warsaw: Polish Geological Institute.

Gabinet, M. P., Kulchitskiy, Ya. O., & Matkovskiy, O. I. (1976). Geologiya i poleznyye iskopayemyye Ukrainskikh Karpat (Part 1). Lvov. [in Russian]

Glushko, V. V., & Kruglov, S. S. (Eds.). (1971). Geologicheskoye stroyeniye i goryuchiye iskopayemyye Sovetskikh Karpat: Trudy UkrNIGRI, 25. [in Russian]

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Kuzovenko, V., & Shlapinskyi, V. (2007). Do pryrody y umov rozmishchennia “skel” neokomskykh diiabaziv u Burkutskomu pokrovi Ukrainskykh Karpat. Pratsi Naukovoho tovarystva imeni T. Shevchenka. Heolohichnyi zbirnyk, 19, 40–49. [in Ukrainian]

Matskiv, B. V., Pukach, B. D., Vorobkanych, V. M., Pastukhanov, S. V., & Hnylko, O. M. (2009). Derzhavna heolohichna karta Ukrainy. Masshtab 1 : 200 000. Karpatska seriia. Arkushi: M-34-XXXVI (Khust), L-34-VI (Baia-Mare), M-35-XXXI (Nadvirna), L-35-I (Visheu-De-Sus). Kyiv. [in Ukrainian]

Tsarnenko, P. N. (1969). Do stratyhrafii kreidianykh vidkladiv Chornohorskoi zony v raioni s. Yasinia. Dopovidi AN URSR. Seriia B. Heolohiia, heohrafiia, khimiia. [in Ukrainian]

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Tsarnenko, P. N. (1989). O nakhodkakh novykh tektonicheskikh ostantsov v Ukrainskikh Karpatakh. In XIV kongress KBGA (pp. 458–461). Sofiya. [in Russian]

Shlapinskyi, V. Ye. (2009). Mikrofauna v olistostromovykh utvorenniakh verkhnoi kreidy Hoverlianskoho subpokrovu v raioni Yasini. In P. F. Hozhyk (Ed.), Vykopna fauna i flora Ukrainy: paleoekolohichnyi ta stratyhrafichnyi aspekty: zbirnyk naukovykh prats Instytutu heolohichnykh nauk NAN Ukrainy (pp. 179–183). Kyiv. [in Ukrainian]

Shlapinskyi, V. E. (2014). Tectonic klippes in the upper reaches of streams Svidovets and Stanislaw (Gorna Tysa basin) – geoturistic objects. In I. Bubniak & A. T. Solecki (Eds.), Geo-Carpathians – Potentia of the Cognitive Tourism (Vol. 30, pp. 77–81). Krosno.

Shlapinskyi, V. E. (2018). Pokuttia deep fault and its influence on tectonics and the oil- and gas-bearing of the south-eastern segment of the Carpathians. Geodynamics, 2(25), 53–69.

Shlapinskyi, V. Ye., Kuzovenko, V. V., & Harashchuk, A. V. (1998). Vyvchennia heoloho-heofizychnykh materialiv po pivdenno-skhidnii chastyni vnutrishnikh flishovykh pokroviv Ukrainskykh Karpat z metoiu vyiavlennia perspektyvnykh na naftu ta haz obiektiv (1995–1998 rr.) (Vol. 1) [Research report]. Lviv: Fondy DP “Zakhidukrheolohiia”. [in Ukrainian]

Vashchenko, V. A. (1985). Otchet po gruppovoy geologicheskoy syemke massshtaba 1 : 50 000 teritorii Ivano-Frankovskoy i Zakarpatskoy oblastey USSR za 1981–1985 gg. (Vol. 1) [Research report]. Kiev: Fondy DP “Zakhidukrheolohiia”. [in Russian]

Vialov, O. S., Danysh, V. V., & Tsarnenko, P. N. (1969). Deiaki novi uiavlennia pro tektoniku Skhidnykh Karpat. Heolohichnyi zhurnal, 29(5), 23–35. [in Ukrainian]

Vialov, O. S., & Tsarnenko, P. N. (1970). Kreidovi vidklady Svydovetskoi ta Krasnoshorskoi pidzon v Ukrainskykh Karpatakh. Dopovidi AN URSR. Seriia B, 11, 969–972. [in Ukrainian]

Vyalov, O. S., Gavura, S. P., Danysh, V. V., Lemishko, O. D., Leshchukh, R. I., Ponomareva, L. D., Romaniv, A. M., Smirnov, S. E., Smolinskaya, N. I., & Tsarnenko, P. N. (1988). Stratotipy melovykh i paleogenovykh otlozheniy Ukrainskikh Karpat. Kiev: Naukova dumka. [in Russian]

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APPARATUS-METHODICAL COMPLEX OF THE STUDY OF PETROPHYSICAL PROPERTIES OF FRACTURED RESERVOIR ROCKS OF HYDROCARBONS

Home > Archive > No. 3–4 (191–192) 2023 > 37–44

Geology & Geochemistry of Combustible Minerals No. 3–4 (191–192) 2023, 37–44

https://doi.org/10.15407/ggcm2023.191-192.037

Ihor KUROVETS, Oleksandr ZUBKO, Ihor HRYTSYK, Oleksandr PRYKHODKO, Roman-Danyil KUCHER

IInstitute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: igggk@mail.lviv.ua

Abstract

We have developed the apparatus-methodical complex of laboratory investigations of fractured reservoir rocks of hydrocarbons. Basing on the study of variability of acoustic properties in different-oriented directions for measuring of raw pieces of core, it was possible to develop the apparatus for the express-diagnostics of the inner structure of the rock. The results of analysis of anisotropy of acoustic properties of the core give us the possibility to choose the specimens with abnormal properties on which one can conduct further investigations for determination of the factors of heterogeneity of rocks. Measuring of the velocity of longitudinal and transverse oscillations with recording their wave pictures is conducting in the acoustic bath. The acoustic system is equipped with corresponding adapter for connection to the computer that enables us to keep up the recording of all parameters of measuring. To estimate the permeability of microfractures and the influence of composite taut state upon them we have developed the device for studying radial filtration the results of which allow us to estimate the rock permeability due to the change in the structure and microfractures size depending upon the value and the character of the taut state. To measure deformational-strength parameters the corresponding plant was developed and produced, which was additionally equipped with a meter for the measuring of deformation, that allows to measure the values of contact strength, elasticity module and the boundary of rock strength while one-axis charging. The parameters are determined at arbitrary points of the core cuts, and the velocity of charging is half-automatically regulated at a wide bounds. The device is equipped with the electron controller that allows us not only to measure the value of contact strength, but to conduct observations on a display as to the changes in deformation depending on the charging value in real time and to put down the parameters of investigations into corresponding data base. Obtained characteristic of rocks is not only parametric basis for interpretation of materials of charging, but for the estimation of the changes in volume, type of porous space and permeability, and also for modelling of formation conditions of fractured reservoir, and on the whole, for prediction of zones (plots) where a dense rock with corresponding mechanical parameters should acquire the properties of the collector. The usage of the complex for the studying of fracturing in oil geology allows us to widen the prognosis and discovery of new fields and to improve production and exploitation possibilities of already acting ones.

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Keywords

apparatus-methodical complex, fractured reservoir rocks, acoustic waves, deformational-strength parameters

Referenses

Krupskyi, Yu. Z., Kurovets, I. M., Senkovskyi, Yu. M., Mykhailov, V. A., Chepil, P. M., Dryhant, D. M., Shlapinskyi, V. Ye., Koltun, Yu. V., Chepil, V. P., Kurovets, S. S., & Bodlak, V. P. (2014). Netradytsiini dzherela vuhlevodniv Ukrainy: Vol. 2. Zakhidnyi naftohazonosnyi rehion. Kyiv: Nika-Tsentr. [in Ukrainian]

Kurovets, I., Zubko, O., Hrytsyk, I., Prykhodko, O., & Kucher, R.-D. (2023). Osoblyvosti formuvannia yemnisno-filtratsiinykh vlastyvostei porid-kolektoriv Vnutrishnoi zony Peredkarpatskoho prohynu. In Heofizyka i heodynamika: prohnozuvannia ta monitorynh heolohichnoho seredovyshcha: zbirnyk materialiv IX Mizhnarodnoi naukovoi konferentsii (10–12 zhovtnia 2023 r.) (pp. 109–112). Lviv. [in Ukrainian]

Kurovets, I. M., Zubko, O. S., Kit, N. O., & Hvozdevych, O. V. (2007). Prystrii dlia vyznachennia pronyknosti zrazka hirskoi porody (Deklaratsiinyi patent Ukrainy № 80551). Biuleten, 16. [in Ukrainian]

Pavliuk, M., Naumko, I., Lazaruk, Ya., Khokha, Yu., Krupskyi, Yu., Savchak, O., Rizun, B., Medvediev, A., Shlapinskyi, V., Kolodii, I., Liubchak, O., Yakovenko, M., Ternavskyi, M., Hryvniak, H., Triska, N., Seniv, O., & Huzarska, L. (2022). Rezerv naftohazovydobutku Zakhidnoho rehionu Ukrainy (Digital ed.). Lviv. http://iggcm.org.ua/wp-content/uploads/2015/10/РЕЗЕРВ-НАФТОГАЗОВИДОБУТКУ-ЗАХІДНОГО-РЕГІОНУ-УКРАЇНИ.pdf [in Ukrainian]

Zubko, A. S. (1989). Nekotoryye osobennosti metodiki laboratornogo opredeleniya vodonasyshchennosti porod-kollektorov. In Geofizicheskaya diagnostika neftegazonosnykh i uglenosnykh razrezov: sbornik nauchnykh trudov AN USSR (pp. 103–113). Kiev: Naukova dumka. [in Russian]

Zubko, A. S., & Sheremeta, O. V. (1988). Razrabotka universalnoy ustanovki vysokogo davleniya UVD-500 i metodika izucheniya petrofizicheskikh svoystv gornykh porod dlya usloviy. modeliruyushchikh plastovyye [Research report]. Lvov: Fondy IGGGI AN USSR. [in Russian]

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ASSESSMENT OF THE DYNAMICS OF WATER-OIL CONTACTS AND ESTABLISHMENT OF EFFECTIVE THICKNESSES ACCORDING TO THE RESULTS OF COMPREHENSIVE GEOPHYSICAL RESEARCH

Home > Archive > No. 3–4 (191–192) 2023 > 31–36

Geology & Geochemistry of Combustible Minerals No. 3–4 (191–192) 2023, 31–36

https://doi.org/10.15407/ggcm2023.191-192.031

Dmytro FEDORYSHYN1, Ihor MYKHAILOVSKYI2, Serhii FEDORYSHYN3, Oleksandr TRUBENKO4

1, 3, 4 Ivano-Frankivsk National Technical University of Oil and Gas, Ivano-Frankivsk, Ukraine
2 LLC “BURPROEKT”, Lviv, Ukraine
e-mail: 1dmytro.fedoryshyn@nung.edu.ua; 2burproekt@ukr.net; 3serhii.fedoryshyn@nung.edu.ua; 4geotom@nung.edu.ua

Abstract

The purpose of the work is to assess the reliability of the results of geological and geophysical studies of complex-constructed Neogene deposits by electrical methods and to develop optimally reliable approaches to the selection of hydrocarbon-saturated rocks with an assessment of their reservoir parameters. In addition, to establish the factors that affect the ambiguity of geological and geophysical conclusions in the process of research of complex lithological and stratigraphic strata, which ultimately causes the omission of reservoir rocks saturated with hydrocarbons. The obtained experimental results of the research of the core material taken from the wells of the adjacent gas condensate fields made it possible to identify the main factors and parameters that determine the filtration-capacity parameters of Neogene deposits. Based on the above, there is a need to substantiate and develop methodological aspects of the use of electrical methods to determine the nature of reservoir rock saturation and to determine the dynamics of water-gas-condensate contacts. The subject of research is the electrical parameters of water- and gas-saturated reservoir rocks. In addition, the substantiation of the effect of pressure and temperature on the performance of electrical methods in the process of researching complex-constructed Neogene reservoir rocks and the peculiarities of the dynamics of changes in water-oil and gas-water contacts. The decrease in oil and gas production from complex geological sections is due to both economic and technological factors that arise in the process of researching the lithological and stratigraphic strata of the Bilche-Volytsa zone. The geological structure of the above-mentioned territories is extremely complex and represents, in particular in the Bilche-Volitsa zone, a classically expressed wing of the platform type, weakly dislocated by upper Miocene molasses.

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Keywords

geophysical studies of monomictic and polymictic reservoir rocks of complex structure, gamma spectrometry, litho-stratigraphic section, clay content, water saturation, porosity, resistivity

Referenses

Catuneanu, O. (2006). Principles of sequence stratigraphy. Amsterdam: Elsevier.

Fedoryshyn, D. D. (1999). Teoretyko-eksperymentalni osnovy petrofizychnoi ta heofizychnoi diahnostyky tonkoprosharkovykh porid-kolektoriv nafty i hazu (na prykladi Karpatskoi naftohazonosnoi provintsii) [Doctorʼs thesis]. Lviv. [in Ukrainian]

Fedoryshyn, D. D., Trubenko, O. M., Fedoryshyn, S. D., Ftemov, Ya. M., & Koval Ya. M. (2016). Perspektyvy yaderno-fizychnykh metodiv pid chas vydilennia hazonasychenykh porid-kolektoriv skladnopobudovanykh neohenovykh vidkladiv. Heodynamika, 2, 134–143. https://doi.org/10.23939/jgd2016.02.134 [in Ukrainian]

Fedyshyn, V. O. (2005). Nyzkoporysti porody-kolektory hazu promyslovoho pryznachennia. Kyiv: UkrDHRI. [in Ukrainian]

Honarpour, M. M., Nagarajan, N. R., & Sampath, K. (2006). Rock/fluid characterization and their integration – Implications on reservoir management. Journal of Petroleum Technology, 58(9), 120–130. https://doi.org/10.2118/103358-JPT

Khomyn, V., Tsomko, V., Hoptarova, N., Bronitska, N., & Trubenko, A. (2019). Heoloho-promyslovi osoblyvosti rozkryttia ta vyprobuvannia slabopronyknykh hazonasychenykh vidkladiv. Visnyk Kyivskoho natsionalnoho universytetu imeni Tarasa Shevchenka. Heolohiia, 1(84), 42–48. https://doi.org/10.17721/1728-2713.84.06 [in Ukrainian]

Krupskyi, Yu. (2001). Heodynamichni umovy formuvannia i naftohazonosnist Karpatskoho ta Volyno-Podilskoho rehioniv Ukrainy. Kyiv: UkrDHRI. [in Ukrainian]

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Lazaruk, Ya., Zaiats, Kh., & Pobihun, I. (2013). Hravitatsiinyi tektohenez Bilche-Volytskoi zony Peredkarpatskoho prohynu. Heolohiia i heokhimiia horiuchykh kopalyn, 1–2(162–163), 5–16. [in Ukrainian]

Miall, A. D. (2006). The geology of fluvial deposits. Sedimentory facies, basin analysis, and petroleum geology. Springer.

Pavliukh, O. (2009). Osoblyvosti heolohichnoi budovy ta formuvannia pokladiv hazu v Zovnishnii zoni Peredkarpatskoho prohynu. Heolohiia i heokhimiia horiuchykh kopalyn, 3–4(148–149), 31–43. http://dspace.nbuv.gov.ua/handle/123456789/58960 [in Ukrainian]

Prokopiv, V. Y., & Fedoryshyn, D. D. (2003). Otsinka heoloho-heofizychnykh neodnoridnostei pry doslidzhenniakh skladnopobudovanykh porid-kolektoriv. Rozvidka ta rozrobka naftovykh i hazovykh rodovyshch, 2(7), 28–34. http://elar.nung.edu.ua/handle/123456789/6307 [in Ukrainian]

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Zaiats, Kh. (2013). Hlybynna budova nadr Zakhidnoho rehionu Ukrainy na osnovi seismichnykh doslidzhen i napriamky poshukovykh robit na naftu ta haz. Lviv: Tsentr Yevropy. [in Ukrainian]

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LITHOLOGICAL AND GEOCHEMICAL CHARACTERISTICS OF THE MIDDLE DEVONIAN STRATA OF THE LVIV DEPRESSION IN THE ASPECT OF THEIR OIL AND GAS BEARING PROSPECTS

Home > Archive > No. 3–4 (191–192) 2023 > 20–30

Geology & Geochemistry of Combustible Minerals No. 3–4 (191–192) 2023, 20–30

https://doi.org/10.15407/ggcm2023.191-192.020

Natalia RADKOVETS, Yuriy KOLTUN

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: radkov_n@ukr.net

Abstract

The Middle Devonian deposits within the Lviv Depression of the Volyn-Podillya plate are largely underexplored and are of great interest for further exploration for hydrocarbons. The presence of two discovered gas fields and the occurrence of granular and fractured reservoir rocks within the entire Lviv Depression point that the deposits of this age range are prospective for further exploration works for hydrocarbons. The authors conducted mineralogical and petrographic studies of these strata in order to study different types of reservoir rocks.

Petrographic studies of terrigenous rocks showed that the reservoir rocks are composed of fine-grained and medium-grained sandstones, as well as fine-grained and coarse-grained siltstones. The matrix in these rocks is contact-porous and contact, composed of dolomitized calcite (4–19 %) and hydromica (3–13 %). Regardless of the type of matrix, the pore space in rocks is formed by intergranular spaces of 0.05 to 0.5 mm size. Siltstone-sandstone deposits represent the granular-type reservoir rocks, the filtration properties of which are formed by the intergranular space, while fractures are of subordinate importance. Terrigenous rocks form gas-bearing horizons in Middle Devonian (Eiffelian and Zhivetian) in the Lokachi field of the Lviv Depression. Carbonate rocks are represented by a wide range of lithological types from slightly dolomitized biodetrital limestones to secondary dolomites. Dolomitization and recrystallization form fracture-like microcaverns with a size of up to 0.5 mm and result in a high porosity of up to 9 %. In carbonate reservoir rocks fracturing is prevailing, while porosity has a subordinate value.

Studies of the molecular composition of natural gases from reservoir rocks of the Middle Devonian of the Lokachi field showed that their predominant component is methane. Its content is 92.7–95.4 vol %. The rest of the methane homologues account for 1.45–2.16 vol %. The total share of non-hydrocarbon gases – nitrogen, carbon dioxide, helium and hydrogen are 3.102–5.082 vol %.

In order to clarify the origin of the Middle Devonian gases of the Lviv Depression, further studies of the carbon, nitrogen, and hydrogen isotopic composition of these gases and the study of the generation properties of the Lower and Middle Devonian rocks of the studied region are necessary.

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Keywords

Lviv Depression, Middle Devonian, reservoir rocks, mineralogical and petrographic composition of rocks, molecular composition of gases

Referenses

Chebanenko, I. I., Vishnyakov, I. B., Vlasov, B. I., & Volovnik, B. Ya. (1990). Geotektonika Volyno-Podolii. Kiev: Naukova dumka. [in Russian]

Fedyshyn, V. O. (Ed.). (1998). Atlas rodovyshch nafty i hazu Ukrainy: Vol. 4. Zakhidnyi naftohazonosnyi rehion. Lviv: Tsentr Yevropy. [in Ukrainian]

Kiessling, W., Flügel, E., & Golonka, J. (2003). Patterns of Phanerozoic carbonate platform sedimentation. Lethaia, 36(3), 195–226. https://doi.org/10.1080/00241160310004648

Krupskyi, Yu. Z. (2001). Heodynamichni umovy formuvannia i naftohazonosnist Karpatskoho ta Volyno-Podilskoho rehioniv Ukrainy. Kyiv: UkrDHRI. [in Ukrainian]

Krupskyi, Yu. Z., Kurovets, I. M., Senkovskyi, Yu. M., Mykhailov, V. A., Kurovets, S. S., & Bodlak, V. P. (2014). Netradytsiini dzherela vuhlevodniv Ukrainy: Vol. 2. Zakhidnyi naftohazonosnyi rehion. Kyiv: Nika-Tsentr. [in Ukrainian]

Pomyanovskaya, G. M. (1974). Stratigrafiya devona Volyno-Podolskoy okrainy Vostochno-Evropeyskoy platformy. In Stratigrafiya USSR: Devon (pp. 7–14. 36–83). Kiev: Naukova dumka. [in Russian]

Radkovets, N., & Koltun, Y. (2022). Dynamics of sedimentation within the southwestern slope of the East European Platform in the Silurian-Early Devonian. Geodynamics, 1(32), 36–48. https://doi.org/10.23939/jgd2022.02.036

Radkovets, N., Kotarba, M., & Wójcik, K. (2017). Source rock geochemistry, petrography of reservoir horizons and origin of natural gas in the Devonian of the Lublin and Lviv basins (SE Poland and western Ukraine). Geological Quarterly, 61(3), 569–589. https://doi.org/10.7306/gq.1361

Rizun, B. P., Medvedev, A. P., & Chizh, E. I. (1976). Formatsii osadochnogo chekhla Volyno-Podolia. Litologiya i poleznyye iskopayemyye, 3, 85–92. [in Russian]

Rizun, B. P., & Chizh, E. I. (1980). Perspektivy neftegazonosnosti Volyno-Podolskoy plity. In Geologiya i neftegazonosnost Volyno-Podolskoy plity (pp. 79–99). Kiev: Naukova dumka. [in Russian]

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OPTIMIZATION DIRECTIONS OF EXPLORATION AND DEVELOPMENT OF OIL FIELDS OF THE WESTERN FORE-BLACK SEA AREA OF UKRAINE

Home > Archive > No. 3–4 (191–192) 2023 > 7–19

Geology & Geochemistry of Combustible Minerals No. 3–4 (191–192) 2023, 7–19

https://doi.org/10.15407/ggcm2023.191-192.007

Yaroslav LAZARUK, Myroslav PAVLYUK

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: igggk@mail.lviv.ua

Abstract

The southern part of the Dobrogea Foredeep is located in the southwestern regions of Ukraine within the Odesa region. Here, on the territory of the uplifted Bilolissya block, the East Sarata, Zhovtyjar, Saryjar, Zarichna oil accumulations are located in the chemogenic-carbonate layer of the Middle and Upper Devonian. The deposits are confined to limestones and dolomites with secondary fractured-cavernous-porous reservoirs. They lie at depths of 2500–3200 m. During the test of two dozen wells, the filtrate of the drilling fluid with a small amount of oil was received with the estimated flow rates of several tons per day. The rise of the oil level in the wells was quickly stopped, the hydrodynamic connection of the wells with the productive formations was lost. The use of today’s known methods of intensification of the flow of hydrocarbon fluids did not lead to positive results. According to the research of microphotographs of reservoir rocks, it is proved that the largest voids of reservoir rocks are filled with immobile bitumen, while the smaller cavities contain mobile oil. Immobile bitumen fills main channels and blocks communication between rock cavities. This is the main reason for the absence of industrial inflows of oil to the wells. Another important reason is the low filtering properties of the collectors. Most of them have a permeability of less than 0.01∙μD. Other reasons for the failure of the industrial development of oil deposits are the high dynamic viscosity of oil due to the high content of asphaltenes, silicagel resins, paraffins, the low energy potential of oil deposits due to their degassing during the long geological time, as well as the lack of hydrodynamic connection of oil deposits with natural water pressure systems. We assume that the Middle and Upper Devonian oil fields of the Western Fore-Black Sea area are most likely mainly bituminous. Given the significant depths of the deposits, their industrial development is technically impossible today. Therefore, it is impractical to plan further scientific research on the mentioned complex. Instead, research should be reoriented to the Silurian terrigenous-carbonate complex and the Lower Devonian terrigenous complex, which are hydrodynamically more closed and in which non-degassed hydrocarbon accumulations can be preserved.

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Keywords

oil, bitumen, deposit, oil traps, carbonate reservoir, terrigenous complex, hydrocarbon reserves, exploration and development of deposits

Referenses

Hnidets, V. P., Hryhorchuk, K. H., Polukhtovych, B. M., & Fedyshyn, V. O. (2003). Litohenez devonskykh vidkladiv Prydobrudzkoho prohynu (paleookeanohrafiia, sedymentatsiina tsyklichnist, formuvannia porid-kolektoriv). Kyiv: UkrDHRI. [in Ukrainian]

Lazaruk, Ya. H., Melnyk, A. Yu., Vasylyna, R. M., & Sheremet, B. B. (2017a). Heoloho-ekonomichna otsinka Skhidnosaratskoho naftovoho rodovyshcha Odeskoi oblasti [Research report]. Kyiv: PrAT NVK “Ukrnaftinvest”. [in Ukrainian]

Lazaruk, Ya. H., Melnyk, A. Yu., Vasylyna, R. M., & Sheremet, B. B. (2017b). Heoloho-ekonomichna otsinka Zhovtoiarskoho naftovoho rodovyshcha Odeskoi oblasti [Research report]. Kyiv: PrAT NVK “Ukrnaftinvest”. [in Ukrainian]

Pavliuk, M. I. (2014). Heodynamichna evoliutsiia ta naftohazonosnist Azovo-Chornomorskoho i Barentsovomorskoho perykontynentalnykh shelfiv. Lviv: Proman. [in Ukrainian]

Serhii, H. B., & Postnikova, N. M. (2014). Utochnennia heolohichnoi budovy perspektyvnykh vidkladiv Biloliskoho bloka Pereddobrudzkoho prohynu na osnovi pohlyblenoi obrobky ta interpretatsii danykh seismorozvidky [Research report]. Kyiv: PrAT NVK “Ukrnaftinvest”. [in Ukrainian]

Trokhymenko, H. L. (2013). Osoblyvosti pryrodnykh rezervuariv vuhlevodniv u potuzhnykh karbonatnykh kompleksakh. Geologiya i poleznyye iskopayemyye Mirovogo okeana, 4, 46–62. [in Ukrainian]

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ON KUZIAN SUITE OF THE MARMAROSH NAPPE OF THE UKRAINIAN CARPATHIANS

Home > Archive > No. 1–2 (189–190) 2023 > 17–25

Geology & Geochemistry of Combustible Minerals No. 1–2 (189–190) 2023, 17–25

https://doi.org/10.15407/ggcm2023.189-190.017

Volodymyr SHLAPINSKY, Myroslav TERNAVSKY

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: igggk@mail.lviv.ua

Abstract

In 1957, L. G. Tkachuk and D. V. Gurzhiy have singled out the Upper Paleozoic Kuzian suite in the north-western part of the Marmarosh crystalline massif at the Rachiv area. It consists of phyllites, limestones, quartzites and dolomites. The suite is widely distributed in the Dilovets subcover of the Marmarosh nappe at the Rakhiv and Chyvchynian areas. There are two alternative points of view upon the age of the Kuzian suite. Some geologists attribute it to Paleozoic time (Upper Devonian-Lower Carboniferous), the others attribute its lower part to the Upper Paleozoic, and the upper one: to Triassic. One can notice the existence of the different estimation of the lithological composition and different estimation of the lithological composition and the volume of the Kuzian suite.Thus, in 1970 A. K. Boiko has devided it into Muntselulska (Lower) phyllite-quartzite one of Paleozoic age and Upper (Triassic) phyllite-carbonate one for which he saved the name Kuzian suite. The important is that a stratigraphic interruption was fixed between the above-mentioned units. The phyllite-carbonate Kuzian suite is dated on the basis of transgressive occurrence of the middle Triassic dolomites on it, discovery of the post-Paleozoic mosses in its lower part at the Soimul Mountain, and in the upper one: the complex of spores and pollen of Mesozoic age. Geologists, that do not recognize the idea of belonging of the part of suite to Mesozoic, indicate the next contradiction. If we accept the Mesozoic age of the Kuzian suite, so we must affirm that carbonate series of Middle Triassic-Jurassic were deposited on the massif at the same time, and 5–8 km southerly, the regional metamorphism of the Kuzian suite occurred within that zone (by the way, according to some facts at an interval of 148–178 and 175–181 mln years, and according to another information: at an interval of 196–221 mln years. This remark is not correct because the age of the Kuzian suite is Lower Triassic (251.9–247.2 mln years), but metamorphism occurred much later. In those sections where the Kuzian suite lies on the Muntselulska one, basal conglomerates consisting of pebbles and quartzitic fragments of underling suite are present in its bottom. Rocks of the Muntselulska and Kuzian suite are similar by their metamorphism intensity. For the Mesozoic Kuzian suite the manifestations of the main magmatism are characteristic, unlike the Upper Paleozoic acids. The facts testify to that the Mesozoic Kusian suite is existing, but there is a certain indefinity as to its finer dividing, stratigraphic volume and correlation with deposits of Middle Triassic. To avoid confusion, it is expedient to alter the name of the Mesozoic Kuzian suite and to name it, for example, Neo-Kuzian.

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Keywords

Kuzian, Muntselulska, suite, Triassic, Paleozoic, Marmarosh nappe, Dilovets subcover, metamorphism

Referenses

Belov, A. A. (1981). Tektonicheskoye razvitiye alpiyskoy skladchatoy zony v paleozoye. Moskva: Nauka. [in Russian]

Boiko, A. K., Ivanchenko, A. I., & Kuriachyi, L. K. (1964). Pro vik kuzynskoi svity Rakhivskoho masyvu. Dopovidi Akademii nauk URSR, 8, 1095–1098. [in Ukrainian]

Boyko, A. K. (1970). Doverkhnepaleozoyskiy kompleks severo-zapadnogo okonchaniya Marmaroshskogo massiva (Vostochnyye Karpaty). Lvov: Izdatelstvo Lvovskogo universiteta. [in Russian]

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Lyashkevich, Z. M., Medvedev, A. P., Krupskiy, Yu. Z., Varichev, A. S., Timoshchuk, V. R., & Stupka, O. O. (1995). Tektono-magmaticheskaya evolyutsiya Karpat. Kiev: Naukova dumka. [in Russian]

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Matskiv, B. V., Pukach, B. D., Vorobkanych, V. M., Pastukhanov, S. V., & Hnylko, O. M. (2009). Derzhavna heolohichna karta Ukrainy. Masshtab 1 : 200 000. Karpatska seriia.  Arkushi: M-34-XXXVI (Khust), L-34-VI (Baia-Mare), M-35-XXXI (Nadvirna), L-35-I (Visheu-De-Sus). Kyiv. [in Ukrainian]

Nenchuk, I. F. (1967). O metamorfizme porod kuzinskoy svity Rakhovskogo massiva. In Voprosy geologii Karpat (pp. 165–167). Lvov: Izdatelstvo Lvovskogo universiteta. [in Russian]

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Tkachuk, L. H., & Danilovych, Yu. R. (1965). Metamorfizm krystalichnykh slantsiv Skhidnykh Ukrainskykh Karpat. Heolohichnyi zhurnal AN URSR, 25(6). [in Ukrainian]

Tkachuk, L. G., & Gurzhiy, D. V. (1957). Rakhovskiy kristallicheskiy massiv. Kiev: Izdatelstvo AN USSR. [in Russian]

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