Increasing hydrocarbon production from reservoir rocks of complex structure within the Neogene system of the Bilche-Volytske zone of the Precarpathian trough is a rather multifaceted problem that needs to be substantiated by conducting comprehensive geophysical, petrophysical and petrographic studies. The aim was to substantiate the physical-mechanical, electrical acoustic and petrophysical parameters based on the results of geophysical studies in a thin-layered Neogene section of gas and gas condensate fields within the Bilche-Volytske zone of the Precarpathian trough. The methodology for studying the complex Neogene sediments within the Bilche-Volytske zone of the Precarpathian trough was based on the quality of geophysical and petrophysical data obtained directly during drilling of exploration and development wells. In addition, the dominant role was played by the results of laboratory experimental studies of core samples, reflecting reservoir thermobaric conditions. Based on the results of such comprehensive geological and geophysical studies, it was established that the readings of geophysical methods are significantly affected by the thin-layered structure of the geological section, which is lithologically represented by the interlayering of sandstones, siltstones and mudstones. It has been found that the downhole instruments used in geophysical expeditions have a significant impact on the readings of geophysical methods. Accordingly, the research results are aimed at improving the efficiency of hydrocarbon exploration and control of their extraction. Therefore, the availability of highly informative integrated geophysical surveys, in particular, multi-probe acoustic logging, high-frequency induction logging isoparametric probing and repeated neutron logging, allows optimising conclusions regarding the prospects for hydrocarbon discovery in complex thin-layer sections. The introduction of new approaches to the identification of such layers and strata will improve the information content of geological and geophysical methods and increase the hydrocarbon yield within the Bilche-Volytske area of the Precarpathian trough
Received 20.11.2023
Revised 21.03.2024
Accepted 31.05.2024
[1] Anikeyev, S., & Rozlovska, S. (2021). Anisotropic transformations of regional gravi-magnetic fields of the Ukrainian Southeast Carpathian. Geodynamics, 2(31), 66-83. doi: 10.23939/jgd2021.02.066.
[2] Bulakh, O., Bezrodna, I., & Yemets, V. (2022). Mathematical modelling of the Bashkir’s and Serpukhiv’s sandstones of the Yablunivske field based on petrophysical data. In 16th international conference monitoring of geological processes and ecological condition of the environment (pp. 1-5). Kyiv: Taras Shevchenko National University of Kyiv. doi: 10.3997/2214-4609.2022580234.
[3] Cannon, S. (2015). Petrophysics: A practical guide. Hoboken: John Wiley & Sons Inc. doi: 10.1002/9781119117636.
[4] Dentith, M., Enkin, R.J., Morris, W., Adams, C., & Bourne, B. (2020). Petrophysics and mineral exploration: A workflow for data analysis and a new interpretation framework. Geophysical Prospecting, 68(1), 178-199. doi: 10.1111/1365-2478.12882.
[5] Dubei, N., & Dubei, M. (2023). Methodological developments for taking into account of layer heterogeneity at the design stage of underground gas storage. In International conference of young professionals “GeoTerrace-2023” (pp. 1-5). Lviv: Lviv Polytechnic National University. doi: 10.3997/2214-4609.2023510044.
[6] Dubei, N., Dubei, M., Boiko, A., & Mykhailiv, I. (2022). Study of the influence of geological features of layers – collectors on gas deposit development processes using 3D modeling. In International conference of young professionals “GeoTerrace-2022” (pp. 1-5). Lviv: Lviv Polytechnic National University.
[7] Fedoryshyn, D., Fedoryshyn, S., & Lyzun, S. (2015). Nuclear and physical methods of wells research. Ivano-Frankivsk: Ivano-Frankivsk National Technical University of Oil and Gas.
[8] Ftemov, Y., Fedoriv, V., & Maniuk, V. (2021). Petrophysical models for estimating filtration-capacity parameters of complex reservoir rocks at Kachalivske oil and gas condensate field. In Geoinformatics (pp. 1-6). Kyiv: European Association of Geoscientists & Engineers. doi: 10.3997/2214-4609.20215521017.
[9] Ganat, T.A. (2020). Hydrocarbon exploration. In Technical guidance for petroleum exploration and production plans (pp. 1-11). Cham: Springer. doi: 10.1007/978-3-030-45250-6_1.
[10] GSTU 41-00032626-00-025-2000. (2001). Coefficient of water saturation of rocks. Method of measurement by centrifugation of samples. Kyiv: Ministry of Ecology and Natural Resources of Ukraine.
[11] Ivaniuta, M.M. (Ed.). (1998). Atlas of oil and gas fields of Ukraine (Vol. 4). Lviv: Tsentr Yevropy.
[12] Karpenko, O.M., Ohar, V.V., Karpenko, I.O., & Bezrodna, I.M. (2021). Differentiation of Rudov Beds based on the statistical methods on geological and geophysical data. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 1, 5-10. doi: 10.33271/nvngu/2021-1/005.
[13] Koval, Y.M., & Fedak, І.О. (2022). Allocation of polymictic sandstones in a complex geological section of oil and gas wells of the Dnipro-Donetsk depression. Oil and Gas Power Engineering, 1(37), 7-14. doi: 10.31471/1993-9868-2022-1(37)-7-14.
[14] Krasnozhon, M.D., Kosachenko, V.D., Tulchynsky, V.G., Karpenko, O.M., & Fedoryshyn, D.D. (2003). Methodical guide to the study of computerized technology “Geoprospecting”. Ivano-Frankivsk: Ivano-Frankivsk National Technical University of Oil and Gas.
[15] Krupskyi, Yu. (2020). Geology and oil and gas content of the western region of Ukraine. Lviv: SPOLOM.
[16] Kurovets, I., Hrytsyk, I., Prykhodko, O., Chepusenko, P., Kucher, Z., Mykhalchuk, S., Melnychuk, S., Lysak, Yu., & Petelko, L. (2021). Petrophysical models of deposits of the menilite suite of the oligocene flysh of the Carpathians and the Precarpathian deep. Geology & Geochemistry of Combustible Minerals, 3-4(185-186), 33-43. doi: 10.15407/ggcm2021.03-04.033.
[17] Kurovets, S.S., Artym, I.V., & Kurovets, I.M. (2018). Researching the fracturing of the reservoir rocks. Journal of Hydrocarbon Power Engineering, 5(1), 1-6.
[18] Kuzmenko, E., Bahrii, S., & Dzoba, U. (2019). The depth range of the Earth’s natural pulse electromagnetic field (or ENPEMF). Journal of Geology, Geography and Geoecology, 27(3), 466-477. doi: 10.15421/111870.
[19] Olita, F., Giampaolo, V., Rizzo, E., Palladino, G., Capozzoli, L., De Martino, G., & Prosser, G. (2023). Investigation of the geological structure of the Tramutola area (Agri Valley): Inferences for the presence of geofluids at shallow crustal levels. Geosciences, 13(3), article number 83. doi: 10.3390/geosciences13030083.
[20] Pavlyuk, M., Lazaruk, Y., Shlapinsky, V., Savchak, O., Kolodiy, I., Ternavsky, L., & Kovalchuk, N. (2021). The formation and criteria of oil- and gas-bearing potential of hydrocarbon accumulations of the western oil-gas region of Ukraine. Geology & Geochemistry of Combustible Minerals, 1-2(183-184), 14-44. doi: 10.15407/ggcm2021.01-02.
[21] Qiu, X., & Wang, Y. (2024). Evaluation of sedimentary characteristics of the Chang 9 oil layer formation in the Yanchang Formation, Ordos Basin. Applied Sciences, 14(10), article number 4035. doi: 10.3390/app14104035.
[22] Stryzhak, L.І., Aleksieienkova, М.V., & Stryzhak, V.P. (2020). Lithogenesis of terrigenous rocks and its influence on filtration-capacity properties of lower carbon reservoirs in the central part of the Dnieper-Donets Basin. Collection of Scientific Works of the Institute of Geological Sciences of the National Academy of Sciences of Ukraine, 13, 80-88. doi: 10.30836/igs.2522-9753.2020.220668.
[23] Sun, G., Dong, W., Zhang, X., Zhong, J., & Sun, N. (2023). Study on dolomite thin layers and nodules in the Qingshankou formation shale oil reservoir of Gulong Sag. Energies, 16(10), article number 3981. doi: 10.3390/en16103981.
[24] Trubenko, O., & Fedoryshyn, S. (2011). Geological and petrophysical parameters as criteria for assessing reservoir properties of reservoir rocks and quality of tires. Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas, 3(29), 41-45.
[25] Yershov, M., Davybida, L., & Shtohryn, L. (2022). Temporal analysis of the long-term hydrogeological monitoring data of the Carpathian Region (Ukraine). In 16th international conference monitoring of geological processes and ecological condition of the environment (pp. 1-5). Kyiv: Taras Shevchenko National University of Kyiv. doi: 10.3997/2214-4609.2022580106.