Category: Oil and Gas Geology

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USE OF THE POINT ELECTROMAGNETIC SOUNDING METHOD FOR PREDICTION OF HYDROCARBON RESERVOIRS IN THE NARIZHNYAN AREA OF THE DNIPRO-DONETS DEPRESSION

Home > Archive > No. 3–4 (195–196) 2024 > 48–61

Geology & Geochemistry of Combustible Minerals No. 3–4 (195–196) 2024, 48–61

https://doi.org/10.15407/ggcm2024.195-196.048

Ihor SKOPYCHENKO1, Vitaly FINCHUK2

1 State Institution “Scientific Center of Mining Geology, Geoecology and Infrastructure Development of the National Academy of Sciences of Ukraine”, Kyiv, Ukraine, e-mail: i.skopychenko@gmail.com
2 An individual entrepreneur Finchuk Vitaly Vasyliovych, Kyiv, Ukraine

Abstract

Geological exploration for oil and gas in the Dnipro-Donets Basin has shown that most fields have a complex structure, which significantly complicates the search for hydrocarbon deposits. The studies were conducted within the structural zone in the Narizhnyanska area to predict hydrocarbon deposits in the Lower Carboniferous Visean and Serpukhivian and Middle Carboniferous Bashkirian deposits, as well as to clarify the structure of the unconformable shielding dump. Fieldwork was carried out along 23 profiles crossing the Narizhnyanska, Rogivska, Shylivska and Burivska structures to identify and delineate electromagnetic anomalies. According to the interpretation of the obtained data, the zones of unconfined rocks are the channels of hydrocarbon migration, and the compression zones are the barriers in front of which they accumulate. The most promising areas for hydrocarbon accumulation are those where the anomalies of the maximum values of the nFisum.mean parameter are located in the southern part, and the anomalies of the minimum values of the parameter are located in the northern part of the area. According to the results of the study, the Point electromagnetic sounding method determined: Narizhnyanska, Rogivska and the northern part of Burivska structure are the most promising areas of the Narizhnyanska area in terms of hydrocarbon deposits.

The results of the work on the Narizhnyanska area showed that the Point electromagnetic sounding method can be used in a complex of exploration and prospecting works to study seismic or other anomalies, determine the depths of horizons of anomalous electromagnetic properties that are promising for hydrocarbon accumulation.

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Keywords

oil and gas content of the subsoil, PEMS method, electrical exploration, electromagnetic sounding, electromagnetic anomalies, vertical gradient of change in the secondary field strength, Narizhnyanska structure

Referenses

Chebanenko, I. I., Kraiushkin, V. O., Klochko, V. P., Hozhyk, P. F., Yevdoshchuk, M. I., Hladun, V. V., Maievskyi, B. Y., Tolkunov, A. P., Tsokha, O. H., Dovzhok, T. E., Yehurnova, M. H., & Maksymchuk, P. Ya. (2002). Naftohazoperspektyvni obiekty Ukrainy. Naftohazonosnist fundamentu osadovykh baseiniv. Kyiv: Naukova dumka. [in Ukrainian]

Demianenko, I. I. (2000). Tendentsii vuhlevodnevoho zapovnennia pastok v produktyvnykh strukturakh fanerozoiu Dniprovsko-Donetskoi zapadyny. In Teoretychni ta prykladni problemy naftohazovoi heolohii (pp. 127–130). Kyiv. [in Ukrainian]

Demianenko, I. I. (2001). Hipsometrychni poverkhy naftohazonosnosti fanerozoiu Dniprovsko-Donetskoi zapadyny. Chernihiv: TsNTI. [in Ukrainian]

Demianenko, I. I. (2004). Problemy i optymizatsiia naftohazoposhukovykh i rozviduvalnykh robit na obiektakh Dniprovsko-Donetskoi zapadyny. Chernihiv: TsNTI. [in Ukrainian]

Etapy i stadii heolohorozviduvalnykh robit na naftu i haz (HSTU 41-00032626-00-011-99). (1999). Kyiv. [in Ukrainian]

Finchuk, V. V., & Skopychenko, I. M. (2011). Rezultaty prohnozuvannia skupchen vuhlevodniv na Narizhnianskii ploshchi Dniprovsko-Donetskoi zapadyny za danymy elektrorozviduvalnykh robit metodom tochkovykh elektromahnitnykh zonduvan. Heolohichnyi zhurnal, 3, 131–138. https://doi.org/10.30836/igs.1025-6814.2011.3.139195 [in Ukrainian]

Skopychenko, I. M., Finchuk, V. V., & Verhelska, N. V. (2018). Vyznachennia zon skupchennia hazu-metanu u vuhleporodnykh masyvakh metodom tochkovoho elektromahnitnoho zonduvannia (na prykladi vuhilnoho baseinu San-Juan, SShA). Heofizychnyi zhurnal, 40(3), 192–198. https://doi.org/10.24028/gzh.0203-3100.v40i3.2018.137201 [in Ukrainian]

Skopychenko, I., Mikhaylyuk, S., & Prosnyakov, V. (2020). Using the method of pulsating electromagnetic sounding to determine disturbed zones in the lithosphere. In Proceedings of the IX International Geomechanics conference (7–11.09.2020, Varna, Bulgaria) (pp. 75–79). Varna.

Starostin, V. A., & Koval, Ya. M. (2011). Indyvidualne modeliuvannia elektroprovidnosti hazonasychenykh porid-kolektoriv skladnoi budovy. Rozvidka ta rozrobka naftovykh i hazovykh rodovyshch, 4(41), 41–46. [in Ukrainian]

Starostin, V. A., & Nahorniak, R. I. (2014). Filtratsiina model naftohazovykh rodovyshch yak kryterii kontroliu vyiavlennia propushchenykh produktyvnykh intervaliv. Rozvidka ta rozrobka naftovykh i hazovykh rodovyshch, 1(50), 140–150. [in Ukrainian]

Zavialov, V. M. (1971). Pro osoblyvosti prostorovoho rozmishchennia pokladiv nafty ta hazu v Dniprovsko-Donetskii zapadyni. Heolohiia i heokhimiia horiuchykh kopalyn, 28, 3–8. [in Ukrainian]

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STUDIES OF COMPOSITE RESERVOIR ROCKS FROM SHALLOW LYING HORIZONS OF THE PRYLUKY UPLIFT OF THE DNIEPER-DONETS DEPRESSION

Home > Archive > No. 3–4 (195–196) 2024 > 36–47

Geology & Geochemistry of Combustible Minerals No. 3–4 (195–196) 2024, 36–47

https://doi.org/10.15407/ggcm2024.195-196.036

Ihor KUROVETS, Oleksandr ZUBKO, Ihor HRYTSYK, Pavlo CHEPUSENKO, Oleksandr PRYKHODKO, Svitlana MELNYCHUK, Zoryana KUCHER

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

Abstract

Increase in the production and stepping up the rate of hydrocarbon reserves is an important task for keeping Ukraine supplied with its own resources. Development of the missed upper horizons or those that are considered to be non-commercial is the cheapest way to increase production. Shallow lying horizons C-8 and C-9 of the Serpukhovian deposits of the Pryluky uplift belong to such objects. Unconventional reservoirs composed of layered, lithologically uneven layers of composite structure of porous space and considerable changeability of the composition are considered to be perspective. Relatively low natural radio-activity according to data of gamma-ray logging, the absence of spontaneous potential-anomalies, somewhat low values of specific resistance, insignificant increase in indices of potential sounding in comparison with gradient sounding, increased values of residual saturation factor are characteristic indications of these reservoir rocks.

According to data of geophysical well logging, the reliable ways and methods of predicting qualitative and quantitative characteristics of the main petrophysical parameters of the reservoirs of given type are absent up to the present because petrophysical properties of such reservoirs are studied not fully. Their development requires the execution of experimental complex investigations of the core samples selected from these horizons that allows us to study the interconnections and mutual stipulating of collecting and geophysical properties of reservoirs with controlled change in parameters in the course of the experiments and to determine the complex of informative parameters of the well logging.

As a result of conducted studies of the rock samples, the lithological type of reservoir was determined and its lithological-petrophysical characteristic was given. Matrix of the rock contains porous space of different type and genesis. Porosity of the interlayers of sandy aleurolites, that are the main oil-saturated reservoirs, reaches the value of 23 to 28 per cent, and with the aid of fractures along bedding of all another lithological varieties, including clayish, they are connected into a single hydrodynamic system bifurcated in the rocks with decreased solidity, and therefore very sensitive to stress redistribution and formation pressure.

There correlational ties between geophysical and capacity-filtration parameters of the reservoir rocks were determined, petrophysical models were constructed for normal and formational conditions and the main factors, sufficiently influencing their value, were determined.

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Keywords

Pryluky uplift, shallow lying horizons, composite reservoir rocks, laboratory studies, petrophysical model

Referenses

Babadagly, V. A., Vakarchuk, G. I., Gavrilko, V. M., Golovatckii, I. N., Izotova, T. S., Kelbas, B. I., Kozak, G. P., Kucheruk, E. V., & Lazaruk, Ia. G. (1982). Metody poiskov neantiklinalnykh zalezhei uglevodorodov na Ukraine: TrudyUkrNIGRI, 31. [in Russian]

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

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LITHOLOGICAL AND FACIAL STRUCTURE AND PROSPECTS OF THE OIL AND GAS CAPACITY OF THE MIDDLE JURASSIC SEDIMENTS OF THE PREDOBROGEAN DEPRESSION

Home > Archive > No. 3–4 (195–196) 2024 > 24–35

Geology & Geochemistry of Combustible Minerals No. 3–4 (195–196) 2024, 24–35

https://doi.org/10.15407/ggcm2024.195-196.024

Kostyantyn HRIGORCHUK1, Volodymyr HNIDETS2, Oksana KOKHAN, Lina BALANDYUK

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: 1kosagri@ukr.net; 2vgnidets53@gmail.com

Abstract

The paper presents the results of complex lithogenetic studies of the Middle Jurassic deposits of the Predobrogean depression. The nature of the lithological-lithmological space-age variability of the Callovian and Bath-Bajocian deposits was established, lithophysical models were built on this basis, and the peculiarities of the development of reservoir rocks of various types and aquitards were clarified. In the lithological structure of the Middle Jurassic, three types of section are distinguished according to the ratio of rock components. It was established that the lithological structure of the Callovian and Bath-Bajocian deposits is significantly different: clayey, as well as siltstone-sand litmites are characteristic of the Bath-Bajocian, and mixed and terrigenous litmites with a carbonate component are characteristic of the Callovian. The lateral lithological and lithological heterogeneity of the sediments indicates that the studied profiles cross several facies zones. Two clastogenic packs of regional distribution were identified in the section of the Bath-Bajocian in the lower and middle parts of the section, 55–60 m and 50–240 m thick, respectively, separated by a pack of clay formations. The Callovian deposits are characterized by the development of mixed litmites, to a certain extent enriched in carbonate rocks. Three oil and gas promising areas have been localized. First, this is the district of Well Suvorivska-4, where the development of a combined (anticlinal and lithologically limited) trap is predicted in the Callovian deposits. Secondly, the area between Well Chervonoarmiyska-2 and Suvorivska-4, where 10 horizons of both pore and fracture reservoirs are wedged in the Bath-Bajocian deposits. The third is the district of Well Starotroyanivska-1, where there is a anticlinal trap with the development in the Bath-Bajocian deposits of two horizons of pore collectors, which are shielded by rather powerful aquitards.

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Keywords

deposits of the Middle Jurassic, litho-lithmological features, reservoir rocks, Predobrogean depression

Referenses

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A NEW MODEL OF THE FORMATION OF THE FOUNDATION OF THE TRANSCARPATHIAN FOREDEEP (in the context of prospects for oil and gas presence)

Home > Archive > No. 3–4 (195–196) 2024 > 5–23

Geology & Geochemistry of Combustible Minerals No. 3–4 (195–196) 2024, 5–23

https://doi.org/10.15407/ggcm2024.195-196.005

Volodymyr SHLAPINSKYI1, Myroslav PAVLYUK2, Olesya SAVCHAK3, Myroslav TERNAVSKYI4

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: 1vlash.ukr@gmail.com; 2igggk@mail.lviv.ua; 3Savchakolesya@gmail.com; 4miroslavtmm@gmail.com

Abstract

In the Transcarpathian Foredeep, the foundation rocks are not exposed on the day surface. They are available for study only based on the results of drilling in the post-war period or geophysical research. Over the entire long period of time, two hundred and fifty wells were drilled in the Transcarpathian Foredeep on twenty-two structures, with a total area of more than two hundred thousand meters. The deep drilling of one hundred and seventy thousand meters (about seventy wells) was carried out on ten structures. Five gas fields have been discovered within the foredeep. Thanks to this, the existence of the Transcarpathian gas-bearing region was established, which entered the boundaries of the Carpathian oil and gas-bearing province. All gas fields known here are localized in the Neogene cover. Meanwhile, one should not ignore the prospects and the not yet sufficiently studied pre-Neogene foundation. Fissured and cavernous limestones and dolomites of the Triassic and Jurassic, as well as terrigenous sediments of the Cretaceous and Paleogene have satisfactory reservoir properties (open porosity 10 % and higher). Significant inflows of combustible gas were recorded in a number of wells. Unfortunately, due to the complexity of the structure of the foundation of the Transcarpathian Foredeep and due to insufficient coverage of it by drilling and geophysical research, ideas about its geological structure cannot be considered satisfactory, unlike the Neogene cover. Therefore, improving knowledge about the structure of the foundation is of great practical importance. Due to the fact that new drilling operations are not currently being conducted to open the foundation, we have tried to rethink the existing geological factual material available to us through its in-depth analysis. As a result, a fundamentally new scheme of tectonic zoning of the foundation of the Transcarpathian Foredeep was proposed. In its composition, we have identified cover units (covers, sub-covers and scales), which better reflects the real state of affairs than existing schemes and expands the possibilities of carrying out exploration work in order to discover industrial accumulations of combustible gas in it.

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Keywords

Transcarpathian Foredeep, foundation, tectonics, faults, cover units

Referenses

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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

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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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Shlapinskyi, V. Ye., Havryshkiv, H. Ya., & Haievska, Yu. P. (2021). Novi dani pro perspektyvni naftohazonosni obiekty u piskovykakh yamnenskoi svity paleotsenu pivnichnoho zakhodu Skybovoho pokryvu Ukrainskykh Karpat. Heolohichnyi zhurnal, 2(375), 90–110. https://doi.org/10.30836/igs.1025-6814.2021.2.225864 [in Ukrainian]

Shlapinskyi, V. Ye., Havryshkiv, H. Ya., & Haievska, Yu. P. (2023). Novi dani pro perspektyvni naftohazonosni obiekty yamnenskoi svity paleotsenu pivdenno-skhidnoi chastyny Skybovoho i Krosnenskoho pokryviv Ukrainskykh Karpat. Heolohichnyi zhurnal, 1(382), 39–52. https://doi.org/10.30836/igs.1025-6814.2023.1.268990 [in Ukrainian]

Vul, M. Ya. (1995). Formuvannia ta zakonomirnosti rozmishchennia rodovyshch nafty i hazu u pidnasuvnykh zonakh Karpat. Lviv: Fondy UkrDHRI. [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]

Kruhlov, S. S. (1961). Kreidovi vulkanichni utvorennia p. Trostiantsia v Skhidnykh Karpatakh. Dopovidi AN URSR, 10, 1350–1352. [in Ukrainian]

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]

Tsarnenko, P. N. (1976). Geologicheskoye stroyeniye Poloninsko-Chernogorskikh i Gorganskikh Karpat [Extended abstract of Candidateʼs thesis]. Lvov. [in Russian]

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]

Zhilovskiy, N. I. (1963). Geologicheskoye stroyeniye i otsenka perspektiv neftegazonosnosti yugo-zapadnogo sklona Ukrainskikh Karpat [Candidateʼs thesis]. Lvov. [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]