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NON-ORE MINERALS OF VEINLET-IMPREGNATED MINERALIZATION IN THE DEPOSITS OF THE KROSNO ZONE OF THE UKRAINIAN CARPATHIANS (district of the new Beskydy railway tunnel)

Home > Archive > No. 1–2 (187–188) 2022 > 103–114

Geology & Geochemistry of Combustible Minerals No. 1–2 (187–188) 2022, 103–114.

https://doi.org/10.15407/ggcm2022.01-02.103

Ihor NAUMKO1, Halyna ZANKOVYCH1, Oksana KOКHAN1, Olexandеr VOVK2, Yaroslav KUZEMKO1, Bohdan SAКHNO1, Roman SERKIZ3

1 Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: igggk@mail.lviv.ua
2 Lesya Ukrainka Volyn National University, Lutsk, Ukraine, е-mail: geologygeochemistry@gmail.com
3 Ivan Franko National University of Lviv, Lviv, Ukraine, е-mail: rserkiz@gmail.com

Abstract

The construction of the new Beskydy railway tunnel, which revealed the indigenous deposits of the Krosno formation of the Ukrainian Carpathians, provided an opportunity to obtain new results from the study of another prospective oil and gas-bearing areas of the flysch formation within the Krosno structural-facies unit. There is a second tunnel in length in Ukraine and passes under the Verkhovyna watershed ridge of the Ukrainian Carpathians. Its section is represented by the rocks of the Krosno formation, namely the stratification of sandstones, argillites and silt stones. There are two fracture zones have been indentified here, in which developed veinle-impregnated mineralization of ore (sulfides) and non-ore (calcite and quartz type of the “Marmarosh diamonds”) minerals. Calcite and quartz formas monominerals veins and in paragenesis calcite-quartz type of the “Marmarosh diamonds” ‒ sulfides. Quartz occurs in the form of splice sand well-faceted crystals, transparent, in yellow, brown, black, green colour. Calcite of a milky, translucent colour in the form of veins, veinlets, impregnation, powder on quartz, druz. Contains significant impurities of magnesium, manganese and iron which means the presence of a rhodochrosite-magnesite-siderite component. Hydrocarbon fluids are present in all calcite and quartz crystals of the “Marmarosh diamonds” type. By chemical composition, it is methane with impurities of higher hydrocarbons (up to hexane). Sometimes the manifestations of the outflow of a black substance with the smell of oil from the cracks in the veinlet-impregnated mineralization are recorded studied rock complexes of the flysch formation of the Krosno zone of the Ukrainian Carpathians (construction area of the new branch of the Beskydy railway tunnel), which acquires an important genetic significance.

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Keywords

veinlet-impregnated mineralization, calcite, “Marmarosh diamonds”, new Beskydy railway tunnel, Krosno zone, Ukrainian Carpathians

Referenses

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Hulii, V., Kuzemko, Ya., Stepanov, V., Petruniak, H., Menshov, O., & Ohorilko, R. (2015). Heoloho-strukturni osoblyvosti ta rechovynnyi sklad porid Krosnenskoi zony v raioni novoho Beskydskoho tuneliu. In Fundamentalne znachennia i prykladna rol heolohichnoi osvity i nauky: tezy dopovidei Mizhnarodnoi naukovoi konferentsii, prysviachenoi 70-richchiu heolohichnoho fakultetu Lvivskoho natsionalnoho universytetu imeni Ivana Franka (Lviv, 7–9 zhovtnia 2015 r.) (pp. 69–71). Lviv: Vydavnychyi tsentr LNU imeni Ivana Franka. [in Ukrainian]

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LITHOLOGY AND SEDIMENTATION CONDITIONS OF PALEOCENE DEPOSITS OF THE SOUTH SLOPE OF THE KARKINITE DEPRESSION (BLACK SEA COAST)

Home > Archive > No. 1–2 (187–188) 2022 > 71–81

Geology & Geochemistry of Combustible Minerals No. 1–2 (187–188) 2022, 71–81.

https://doi.org/10.15407/ggcm2022.01-02.071

Kostyantyn HRYGORCHUK1, Volodymyr HNIDETS2, 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

According to the results of lithological studies of the Paleocene sediments of the southern side of the Karkinite Depression, the lateral lithological-lithmological and facial variability of the sediments is characterized, which is manifested both in the whole section of the Paleocene and its individual epochs. It is shown that the role of limestone formations clearly decreases from the beginning to the end of the period with their maximum development in Zealand time. Sediments of the Tanetian epoch are characterized by dominance in the section of marl-clay formations and the development of siltstone-sand bodies in the area of the Odesa structure. Sediments are represented by three types of section: terrigenous (well Odeska-2), carbonate (wells Hamburtseva-2, Selskogo-40), carbonate-clay (wells Crimean-1, Shtormova-5, Centralna-1, Arkhangelskogo-1). In different areas, each type of section is characterized by a certain specificity of the internal structure. Lithological heterogeneity of sediments is associated with spatial and age variability of biofacial zones: biogerms, inland biogerm lagoons, plumes of destruction of bioherms, the outer shelf. In the sediments of the Danian age, small limestone bodies are localized in the Shtormova and Odesa structures. Zealand strata in the area from well Hamburtseva-2 to well Centralna-1 are characterized by significant development of bioherms, which are replaced in the direction of the Odesa structure by plumes of destruction and sediments of basin plains. The development of bioherm formations in the axial part of the depression is predicted, which is associated with the sedimentary manifestation of the Central Mikhailovsky uplift. This significantly expands the prospects for oil and gas in this part of the study area. During the Tanetian period, rising sea levels caused an increase in the area of distribution of the outer shelf in the axial zone of depression. At the same time, in the area of the structures of Hamburtseva, Selskogo, Centralna inheritedly (despite the transgression) were developed biohermic massifs, which was caused by upward movements within the Black Sea-Kalamitsky uplift.

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Keywords

lithology, facies, sedimentation conditions, Paleocene, Karkinite Depression

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LITHOGEOCHEMISTRY OF BLACK SHALES OF THE PHANEROZOIC OF THE WESTERN UKRAINE – UNCONVENTIONAL HYDROCARBON RESERVOIRS

Home > Archive > No. 1–2 (187–188) 2022 > 82–102

Geology & Geochemistry of Combustible Minerals No. 1–2 (187–188) 2022, 82–102.

https://doi.org/10.15407/ggcm2022.01-02.082

Ihor POPP, Petro MOROZ, Mykhaylo SHAPOVALOV

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

Abstract

The purpose of this work is to compare the lithological, geochemical and mineralogical features of carbonaceous clayey and siliceous-clay rocks of Cretaceous-Paleogene flysch of the Ukrainian Carpathians and Lower Silurian of the Volyn-Podillya edge of the East European Platform and to determine the factors that contributed to the formation of zones of “unconventional reservoirs” in these sedimentary strata of cracked and mixed types.

Data from the lithology, geochemistry and mineralogy of bituminous siliceous-clay rocks and siliceous rocks of Lower Cretaceous and Oligocene of the Carpathians and black argillites of Lower Silurian of the Volyn-Podillya edge of the East European Platform are presented.

Sedimentogenesis of Lower Cretaceous and Oligocene bituminous deposits of the Carpathians and Lower Silurian deposits of Volyn-Podillya took place in anoxic conditions (phases of oceanic anoxic events: OAE-1 (Barrem–Albian), OAE-4 (Oligocene) and at the border of Ordovician and Silurian. Paleoceanographic conditions of their sedimentation differed significantly. The first are deep-sea formations at the foot of the continental slope of the Carpathian segment of the Tethys Ocean, the second were accumulated in the warm shallow sea on the eastern shelf of the West European Sea Basin.

The layered texture of carbonaceous deposits, as well as the catagenetic transformation of rock-forming clay and siliceous minerals and their hydrophobization, played a significant role in the formation of the filtration capacity properties of “unconventional reservoirs”. In Cretaceous-Paleogene flysch deposits of the Carpathians, “unconventional reservoirs” are usually terrigenous-clay or siliceous-clay rocks with shale and layered texture or compacted sandstones localized in conventional oil, gas or condensate deposits. Lower Silurian clay deposits of Volyn-Podillya are promising for the search for “shale gas”.

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Keywords

unconventional reservoirs, black shales, shale gas, clay minerals, organic carbon

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GEOCHEMICAL FEATURES OF STRONTIUM ACCUMULATION AND MIGRATION IN THE PEATS OF THE LVIV REGION

Home > Archive > No. 1–2 (187–188) 2022 > 58–70

Geology & Geochemistry of Combustible Minerals No. 1–2 (187–188) 2022, 58–70.

https://doi.org/10.15407/ggcm2022.01-02.058

Myroslava YAKOVENKO

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

Abstract

The article is devoted to the study of geochemical characteristics of the distribution, accumulation and migration of strontium in the lowland peats of the Lviv Region, both laterally and vertically, and to identify the main factors influencing the formation of its concentrations.

A significant uneven distribution of concentration, high dispersion and variability (coefficient of variation – 116.61, standard deviation – 564.11) of Sr in peats within deposits, districts and regions both with depth and area of distribution and high content indicators were established Sr relative to clarks of the lithosphere, soils, plant ash (CC relative to the lithosphere = 1.42; CC relative to soil clarks = 1.94; Сs relative to background values in the soils of Ukraine = 4.56; CK relative to clarks of terrestrial plants = 1.61).

The content of Sr in the peat of the Lviv Region ranges from 40–3190 mg/kg (average content 483.75 mg/kg, median content (background content) – 250 mg/kg), which is due to natural-climatic, geological, lithological, hydrogeochemical and anthropogenic factors.

The features of the distribution and the degree of concentration of Sr in the peatlands of the Lviv Region are mainly influenced by the chemical-mineralogical-petrographic composition of the bedrocks of the wear area during their weathering; terrain, climatic, geomorphological, tectonic and hydrogeological conditions of the area, which determine the of the weathering processes of the rocks in the wear areas, the degree of transformation of terrigenous material in the weathering processes, the rate of accumulation of biomass and the rate of its decomposition; features of water and mineral nutrition of the peatland.

High concentrations of strontium in the peat of the Lviv Region reflect the local regional processes of the concentration of the element in the mass of peat and may indicate the accumulation of Sr of both natural and anthropogenic origin in the upper layers of peat profiles. There is an enrichment of Sr in the upper intervals of deposits (0–1 m) of deposits in the northeastern part of the Lviv Region (Malopoliska peat region) is observed.

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Keywords

peat, peat deposit, strontium, microelement composition, concentration, Clark concentration, accumulation, migration

Referenses

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DEFORMATIONS IN THE THRUST ZONE BETWEEN THE ZELEMIANKA AND PARASHKA SKYBAS OF THE UKRAINIAN CARPATHIAN SKYBA NAPPE (HREBENIV QUARRY)

Home > Archive > No. 1–2 (187–188) 2022 > 48–57

Geology & Geochemistry of Combustible Minerals No. 1–2 (187–188) 2022, 48–57.

https://doi.org/10.15407/ggcm2022.01-02.048

Milena BOGDANOVA

Ivan Franko National University of Lviv, Ukraine, e-mail: milena_bogdanova@ukr.net

Abstract

In the article, based on own field observations, the deformation structures into the thrust zone of the Zelemianka Skyba (=thrust-sheet) onto the Parashka Skyba (the Ukrainian Carpathian Skyba Nappe) are described. They are exposed in the Hrebeniv quarry located in the Opir River basin (Lviv Region, Skole district). The tectonically disintegrated Stryi Formation (Upper-Cretaceous–Paleocene flysch) characterized by the rigid sandstone blocks (formed mainly as a result of boudinage) placed in a ductile clay matrix is represented in the Hrebeniv quarry. This formation is proposed to be classified as a “broken formation”, which is strongly tectonized, but retain their lithological and stratigraphic identity. It is a transitional element between the weakly deformed strata and tectonic mélange. Their characteristic features are: linearity of the distribution zone; significant monomictic composition and absence of exotic formations; the presence of an intensively tectonized matrix with clastolites (blocks) of less tectonized rocks of the same lithostratum (formation, series); the presence of newly formed hydrothermal minerals in clastolite cracks; the upper and lower contacts limiting the broken formation have a tectonic nature. An intensely tectonized matrix and a weakly tectonized rigid blocks belong to the same stratigraphic unit in a broken formation. The structural features suggest a brittle deformations in the studied rocks. Tectonic processes occurred in the completely lithified deposits. Thrust processes were accompanied by the formation of the duplexes, including antiformal stack duplexes, which are well expressed in the quarry. Duplexes are observed in different parts of the quarry, and the most representative ones are developed in its central section. Horses in the duplexes are characterized by a size of 1 to 3 meters here. They are generally subparallel, which is consistent with monoclinal bedding, however, they sometimes acquire an antiform appearance as a result of tectonic thrusting.

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Keywords

Ukrainian Carpathians, Skyba Nappe, broken formation, thrust zone, deformations, duplexes

Referenses

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AGE AND SEDIMENTARY ENVIRONMENTS OF THE PALEOCENE DEPOSITS IN THE CARPATHIAN SKYBA NAPPE BASED ON MICROPALEONTOLOGICAL AND SEDIMENTOLOGICAL DATA

Home > Archive > No. 1–2 (187–188) 2022 > 36–47

Geology & Geochemistry of Combustible Minerals No. 1–2 (187–188) 2022, 36–47.

https://doi.org/10.15407/ggcm2022.01-02.036

Oleh HNYLKO, Aida ANDREEVA-GRIGOROVICH, Svitlana HNYLKO

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 results of micropaleontological and sedimentological studies of the Paleocene sediments such as the Upper Member of the Stryi Formation and the Yamna Formation located in the Skyba Nappe in the Ukrainian Outer (Flysh) Carpathians are represented. Sedimentological features of the flysch successions (including the sedimentary succession along the Prut River in the city of Yaremche) proved that the Upper Member of the Stryi Formation is represented mainly by turbidites; the lower part of the Yamna Formation (variegated Yaremcha Horizon) is composed of red and green clay hemipelagites and turbidites, and the upper part of the Yamna Formation (Yamna sandstone) consists of deposits of high-density turbidite currents and grain flows.

The calcareous nannoplankton: NP1, NP2, NP3 and NP4 zones as well as the foraminifera: planktonic Globoconusa daubjergensis Zone (Danian Stage) and benthic Rzehakina epigona Subzone of Rzehakina fissistomata Zone, s. l. (the early Paleocene) are identified in the Upper Member of the Stryi Formation. The calcareous nannoplanktonic NP4, NP5, NP6 zones are distinguished in the Yaremcha Horizon and NP6, NP8, NP9 zones are identified in the Yamna sandstone. The agglutinated foraminifera including Rzehakina fissistomatа, Rz. epigona, Caudammina ovula, Hormosina velascoense, Glomospirella grzybowskii, Saccammina placenta, Paratrochamminoides irregularis are dominated in the Yamna Formation. The age of the Stryi Formation (Upper Member) is established as Danian–partly Zealandian, and the age of the Yamna Formation is Zealandian–Thanetian based on nannoplankton and foraminifera data.

Deep-water agglutinated foraminifera (DWAF) belonging to the genera Rhabdammina, Hyperammina, Dendrophrya, Ammodiscus, Glomospira, Hormosina, Reophax, Haplophragmoides, Recurvoides, Trochamminoides, Paratrochamminoides, Spiroplectammina, Karreriella are dominated in the background hemipelagic clay deposits and make up to 100% of the tests in the microfaunal associations, that suggests the lower bathyal-abyssal depths of the sedimentary paleobasin The channel deposits (Yamna sandstone) and interchannel sediments (Upper Member of the Stryi Formation) of the ancient deep-sea fan are identified in the Paleogene flysch.

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Keywords

Ukrainian Carpathians, Skyba Nappe, Paleocene, foraminifera, nannoplankton, sedimentation

Referenses

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GEOLOGICAL GROUNDS OF PERSPECTIVE ZONES FOR THE ACCUMULATION OF BEHIND-PIPE GAS RESERVES (East-Novoselovskyi Oil-Gas Condensate Field, Dnieper-Donets Depression)

Home > Archive > No. 1–2 (187–188) 2022 > 27–35

Geology & Geochemistry of Combustible Minerals No. 1–2 (187–188) 2022, 27–35.

https://doi.org/10.15407/ggcm2022.01-02.027

Vyacheslav LUKINOV1, Kostyantyn BEZRUCHKO1, Oleksii PRYKHODCHENKO1, Vladyslav KOBEZA2

1 M. S. Polyakov Institute of Geotechnical Mechanics of National Academy of Sciences of Ukraine, Dnipro, Ukraine, e-mail: gvrvg@meta.ua
2 “Shebelinkagazvydobuvannia” Gas Industry Department of Ukrgazvydobuvannia JSC, Donets, Kharkiv Region, Ukraine, e-mail: Kobeza15@gmail.com

Abstract

The practical experience of long-term operation of hydrocarbon deposits confirms the presence of geomechanical processes and their significant impact on the state of the gas-saturated massif of rocks. In fields that are being operated for a long time, the prospects for industrial hydrocarbon accumulation can be associated with secondary gas traps of non-traditional type, in particular, technogenic ones, which are formed in low-pore reservoirs. A detailed analysis of the geological conditions of the East-Novoselovskyi field was carried out. They contribute to the formation of additional gas resources (“behind-pipe reserves” category), as well as the establishment of geological-industrial indices of the perspectivity for the formation of technogenic deposits was carried out.

The purpose of the work is geological justification and finding perspective zones for the accumulation of behind-pipe reserves through the formation of technogenic deposits under the impact of a geomechanical factor, using the example of the East-Novoselovskyi oil-gas condensate field.

For the geological conditions of the East-Novoselovskiy Oil-Gas Condensate Field, producing the additional gas reserves should be expected from technogenic deposits that are located above the industrial horizons that are being developed and formed in low-porous reservoirs under the action of a geomechanical factor, as a result of their decompaction after gas extraction from an industrial reservoir as a result of its compression. In accordance with the conducted research, the most perspective section, from the standpoint of the formation of a technogenic deposit and the accumulation of behind-pipe reserves, within the East-Novoselovskyi Oil-Gas Condensate Field there is the strata identified in the area of wells No. 16, 18, 60, in the section interval at a distance of 92.4 m up from the roof of the horizon (B-3b), which is located from a depth of 2141 m to the roof of the horizon B-3a, at a depth of 2 233 m. It is worthwhile to further carry out appropriate geophysical work for conducting the technological work for the development of technogenic deposits in perspective zones behind the casing column in operated wells.

The account of the geomechanical factor opens up the perspective of producing the additional industrial gas influx at the late stages of the development of gas and gas-condensate fields, by predicting the geological conditions for the formation of the improved secondary filtration-capacitive properties favorable to form technogenic gas deposits.

Full Text

Keywords

gas fields, geomechanical factor, technogenic reservoir, behind-pipe reserves

Referenses

Abielientsev, V. M., Lurie, A. Y., Povieriennyi, S. F., & Susiak, T. Ya. (2017). Nova metodyka interpretatsii rezultativ laboratornykh doslidzhen hirskykh porid pry modeliuvanni plastovykh umov [A new method for interpreting the results of laboratory studies of rocks in modeling reservoir conditions]. Heolohichnyi zhurnal, 3, 23–30. https://doi.org/10.30836/igs.1025-6814.2017.3.117319 [in Ukrainian]

Bulat, A. F., Lukinov, V. V, Bezruchko, K. A., Krukovskyi, O. P., & Krukovska, V. V. (2018). Heomekhanichnyi chynnyk nadkhodzhennia dodatkovykh obsiahiv vilnoho metanu pry ekspluatatsii hazovykh rodovyshch [Geomechanical factor of receipt of additional volumes of free methane during the operation of gas fields]. Dopovidi Natsionalnoi akademii nauk Ukrainy, 8, 25–35. https://doi.org/10.15407/dopovidi2018.08.025 [in Ukrainian]

Bulat, A. F., Lukinov, V. V, Bezruchko, K. A., & Prykhodchenko, O. V. (2020). Vplyv heomekhanichnykh protsesiv na plastovyi tysk pry tryvalii ekspluatatsii hazovykh rodovyshch [Influence of geomechanical processes on reservoir pressure during long-term operation of gas fields]. Rozvidka ta rozrobka naftovykh ta hazovykh rodovyshch, 4(77), 62–76. https://doi.org/10.31471/1993-9973-2020-4(77)-62-76 [in Ukrainian]

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TECTONIC UNITS OF THE KROSNO (SILESIA) COVER OF THE FOLDED CARPATHIANS: TYKHIY (UKRAINE) AND VETLINA (POLAND) STRUCTURES – GEOLOGICAL STRUCTURE AND GAS-BEARING POTENTIAL

Home > Archive > No. 1–2 (187–188) 2022 > 5–26

Geology & Geochemistry of Combustible Minerals No. 1–2 (187–188) 2022, 5–26.

https://doi.org/10.15407/ggcm2022.01-02.005

Myroslav PAVLYUK, 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 the south-western part of the Krosno cover in the terrain of the Ukraine, that is called jednostka Szląska (Silesia Unit) in the adjoining Polish territory, two tectonic structures Tykhiy and Vetlina composed of flysh of the Cretaceous-Paleogene age, are correspondingly present. They are in the same scale and represent preserved anticlinal fold of the north-western strike. The Tykhiy and Vetlina structures were defined according to results of drilling. In consequence of executed drilling works the commercial gas presence of both structures was determined. Maximum gas discharges from the deposits of Oligocene at both structures are estimated to be approximately 60th m3/day. The production reserves of the Vetlina structure are estimated at 73 million m3 of gas. The deposit is not being developed due to localization in the area within the Beskydy National Park. The authors don’t recommend to carry out exploratory drilling within the limits of the structure, in located further north-east of the Tykhiy structure the Volosianka–Pidpolozzia and Husne–Bukovets scales as the ineffective drilling because of the absence of perspective objects in their composition. There are prerequisites to suppose the presence of just one more gas-saturated fold, Liuta, further south-west of the Tykhiy structure, under the Duklya–Chornohora cover. It is located within the hydrocarbon field, favourable for the search for hydrocarbons. The potential industrial gas potential of the forecasted promising structure is evidenced by the inflows of oil and gas in the mapping wells of Liuta Square. Significant manifestations of hydrocarbons were observed in well 18-Liuta. From a depth of 40 m, and then 190 m recorded oil manifestations – oil films on the surface of the clay solution (d 20 – 0.843 g/cm3; viscosity in 0E – 1.92; S – 0.22 %, the beginning of boiling – 97 °C, up to 350 °C – 56 %). Intense gas manifestations were noted from a depth of 167 m (CH4 – 95.36 %; CO2 – 1.01 %; N2 – 3.63 %). To check this supposition, it is expedient to conduct seismic survey.

Full Text

Keywords

Krosno cover, Tykhiy and Vetlina structures, geological structure, gas-bearingness

Referenses

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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]

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SUBSTANDARD COMBUSTIBLE MINERALS OF UKRAINE AND PRINCIPLES OF THEIR ECOLOGICAL CONVERSION

Home > Archive > No. 1–2 (187–188) 2022 > 127–140

Geology & Geochemistry of Combustible Minerals No. 1–2 (187–188) 2022, 127–140.

https://doi.org/10.15407/ggcm2022.01-02.127

Dmytro BRYK, Myroslav PODOLSKY, Lesia KULCHYTSKA-ZHYHAILO, Oleh GVOZDEVYCH

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

Abstract

In the general case, substandard combustible minerals include on-balance and off-balance reserves of primary energy materials – coal and peat deposits (solid combustible minerals) and oil and natural gas deposits (liquid and gaseous combustible minerals), which by physico-chemical, energy or geological-spatial conditions do not meet the economic criteria for extraction and use of traditional technological methods, as well as the potential of methane from coal deposits, arrays of man-made carbon-containing materials such as waste from coal mining, coal beneficiation, refining, etc. Review of the available reserves in terms of the use of modern technologies of environmentally friendly conversion can significantly expand the opportunities for the development of all types of combustible minerals in Ukraine.

The paper considers the geological zoning of oil and gas fields and deposits of solid combustible minerals, as well as their reserves and production. It is shown that the reserves of the main primary energy resources in Ukraine many times exceeds the extraction and has significant opportunities to increase due to the use of substandard combustible minerals.

The principles of ecologically safe conversion of substandard combustible minerals in terrestrial and underground conditions are presented. The importance of energy utilization of methane from coal deposits, arrays of such man-made carbon-containing materials as coal mining waste, coal beneficiation, oil refining, etc. was noted. The main mining-geological and technological criteria that contribute to the development of coal seams by underground gasification are given, as well as deposits and areas of coal basins of Ukraine that are suitable for underground gasification.

Full Text

Keywords

combustible minerals, coal, gasification, ecological conversion

Referenses

Bryk, D., Hvozdevych, O., Kulchytska-Zhyhailo, L., & Podolskyi, M. (2019). Tekhnohenni vuhlevmisni obiekty Chervonohradskoho hirnychopromyslovoho raionu ta deiaki tekhnichni rishennia yikhnoho vykorystannia. Heolohiia i heokhimiia horiuchykh kopalyn, 4(181), 45–65. https://doi.org/10.15407/ggcm2019.04.045 [in Ukrainian]

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GEOLOGICAL STRUCTURE AND PROSPECTS OF OIL-GAS PRESENCE AT THE POHAR PLOT (Folded Carpathians)

Home > Archive > No. 3–4 (185–186) 2021 > 5–15

Geology & Geochemistry of Combustible Minerals No. 3–4 (185–186) 2021, 5–15.

https://doi.org/10.15407/ggcm2021.03-04.005

Volodymyr SHLAPINSKY, Myroslav PAVLYUK, Yaroslav LAZARUK, Olesya SAVCHAK, Myroslav TERNAVSKY

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

Abstract

The Pohar plot is situated in the Skole district of the Lviv Region, 30 km south-west of Skole town, between Pohar and Kryve villages. Tectonically it is located in of junction of the Skybian (Slavske Skyba) and the Krosno covers. At the end of XIX beginning of XX centuries in the region of the village the oil-extracting enterprise was existent. There deposits of Oligocen and Eocene of the Rozluch belt of the Krosno cover and Oligocene of the scale of the Slavske skyba of the Skybian cover were exploited. During two ten-years of exploitation by exploring shafts and shallow boreholes more than 3 thousand ton of oil was extracted. Prospects of the Pohar plot should be connected with sand horizons of the Holovets suite of Oligocen (Klivsky sandstones) that are characterized by satisfactory reservoir properties. They are localized in the immersed part of the Hrosivsky scale of the Krosno cover separated by the Rozluch fault (tectonically screened deposit) from its forkball part, drilled in 1973–1974 1-Pohar borehole (well bottom 1935 m), due to deflection of its hole to the south-east, didn’t expose the Klivsky sandstones and didn’t solve its task. For complete exposition of the Klivsky sandstones of the Holovets suite of Oligocene of the Hrosivsky scale it is necessary to design vertically oriented 2-Pohar borehole of 2300 m in depth. About probable commercial oil-gas saturation of the horizon of the Klivsky sandstones testifies not only to the existence of the oil-extracting enterprise in the past, but the intensive surface oil shows in the stretched area that is controlled by the Rozluch fault. Moreover, taking the prospect of the zone of junction of the given covers in consideration, the seismic survey should be conducted at the Pohar area for the estimation of the geological structure of the deeper horizons and parametric borehole of 4000–5000 m in depth should be designed.

Full Text

Keywords

Skybian and Krosno covers, Rozluch fault, oil extracting enterprise, prospects of oil-gas presence

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