At the present stage of geological research in order to search for oil and gas fields, the urgent task is to assess the reservoir rocks’ fracturing using mathematical models. A promising method for estimating the reservoir rocks fracturing is the analysis of the stress-strain state of the sand-siltstone stratum by finite-element modeling of tectonophysical processes occurring within it. Substantiation and basic approaches to tectonophysical modeling of this stratum in order to assess the fracture of promising oil and gas deposits have been developed in our previous studies. In the first stage of research, a model has been developed to estimate the stress-strain state of a symmetric anticline. However, due to the complex shapes of formation inflexions native to the deposits of the Pre-Carpathian Depression Inner Zone such a simplified model cannot be qualitatively applied. In the second stage, the model has been improved and tested on such investigated deposits of the Inner Zone of the Pre-Carpathian Depression as Pivdenno-Hvizdetske and Starosambirske. Approbation of the improved tectonophysical model on these deposits of the Inner Zone of the Pre-Carpathian Depression has proved the possibility of its use for anticlines of complex shape. This makes it possible in the third stage with the help of the model developed by us to study the tectonic fracturing of quite complex oil and gas prospects. The objects of research selected are such promising deposits of the Inner Zone of the Pre-Carpathian Depression as the Krychkivsky block of Pivdennoslyvkinsky Region, Angelivsk Structure and PivnichnaOpaka Region. According to the results of the research, the location of exploratory wells has been clarified. The analysis of the obtained results indicates the possibility of using the proposed model for rapid assessment of areas of increased fracture of the real deflections of the layers
Received 23.08.2021
Revised 06.01.2022
Accepted 01.03.2022
[1] Monchak L.S., Anikeiev S., Zhuchenko G., Zderka T.V., Monchak Y.L., Khomyn V.R. (2019). Shchodo realnykh perspektyv vidkryttia novykh rodovyshch ta naroshchennia vydobutku nafty i hazu u Zakhidnomu rehioni Ukrainy. Prospecting and Development of Oil and Gas Fields, No 2(71). С. 7-19. https://doi.org/10.31471/ 1993-9973-2019-2(71)-7-19. [in Ukrainian]
[2] Stavrogin A.N., Tarasov B.G. Eksperimentalnaya fizika i mehanika gornyih porod. SPb: Nauka, 2001. [in Russian]
[3] Atkinson P.M., Foody G.M., Darby S.E., Wu F. GeoDynamics, 2005.
[4] Ismail-Zadeh A., Tackley P. Computational Methods for Geodynamics, 2010.
[5] Backers T. Fracture Toughness Determination and Micromechanics of Rock Under Mode I and Mode II Loading. Diss, 2004.
[6] Noorian-Bidgoli M. Strength and deformability of fractured rocks. Diss. Stockholm, 2014.
[7] Guo H. Rock cutting studies using fracture mechanics, 1990.
[8] Shen Baotang, Stephansson O., Rinne M. Modelling Rock Fracturing Processes: A Fracture Mechanics Approach Using FRACOD, 2014.
[9] De Borst R. Computational Methods for Fracture in Porous Media: Isogeometric and Extended Finite Element Methods, 2018.
[10] Salze, M., Martinod, J., Guillaume, B., Kermarrec, J.-J., Ghiglione, M.C., Sue, C., 2018. Trench-parallel spreading ridge subduction and its consequences for the geological evolution of the overriding plate: Insights from analogue models and comparison with the Neogene subduction beneath Patagonia. Tectonophysics, doi: 10.1016/j.tecto.2018.04.018
[11] Guillaume, B., Hertgen, S., Martinod, J., and Cerpa, N.G., 2018. Slab dip, surface tectonics: How and when do they change following an acceleration/slow down of the overriding plate ? Tectonophysics 726, P. 110-120, doi: 10.1016/j.tecto.2018.01.030.
[12] Brun, J.-P., Sokoutis, D., Tirel, C., Gueydan, F., Van Den Driessche J. , and Beslier M.-O., in press. Crustal versus mantle core complexes, Tectonophysics, doi: 10.1016/j.tecto.2017.09.017.
[13] Bajolet F., Chardon D., Martinod J., Gapais D., Kermarrec J.J., 2015. Syn-convergence flow inside and at the margin of orogenic plateaux: Lithospheric-scale experimental approach. J.G.R. Solid Earth, 120, 6634-6657, doi: 10.1002/2015JB012110.
[14] Kydonakis, K., Brun J.-P., Sokoutis D., 2015. North Aegean core complexes, the gravity spreading of a thrust wedge, J. Geophys. Res. Solid Earth, 120, doi : 10.1002/2014JB011601.
[15] Driehaus, L., T. Nalpas, J.-F. Ballard, 2014. Interaction between deformation and sedimentation in a multidecollement thrust zone : Analogue modelling and application to the SubAndean thrust belt of Bolivia. Journal of Structural Geology, 65, 59-68, doi: 10.1016/j.jsg.2014.04.003
[16] Gapais D., Jaguin J., Cagnard F., Boulvais P., 2014. Pop-down tectonics, fluid channelling and ore deposits within ancient hot orogens. Tectonophysics, 618, 102-106.12, doi: 10.1016/j.tecto.2014.01.027
[17] Philippon M., Brun J-P., Gueydan F. and Sokoutis D., 2014. The interaction between Aegean back-arc extension and Anatolia escape since Middle Miocene. Tectonophysics, doi: 10.1016/j.tecto.2014.04.039
[18] Zanella, A., Cobbold, P.R., Le Carlier de Veslud, C., 2014. Physical modelling of chemical compaction, overpressure development, hydraulic fracturing and thrust detachments in organic-rich source rock. Marine and Petroleum Geology 55, 262-274, doi : 10.1016/j.marpetgeo.2013.12.017.
[19] Barrier, L., T. Nalpas, D. Gapais, J.-N. Proust, 2013. Impact of synkinematic sedimentation on the geometry and dynamics of compressive growth structures : Insights from analogue modelling. Tectonophysics, 608, 737- 752.5, doi : 10.1016/j.tecto.2013.08.005 2
[20] Driehaus, L., Nalpas, T., Cobbold, P.R., Gelabert, B., Sàbat, F. 2013. Effects of marginparallel shortening and density contrasts on backarc extension during subduction : Experimental insights and possible application to Anatolia. Tectonophysics, 608, 288-302, doi: 10.1016/j.tecto.2013.09.028.
[21] Midtkandal I., Brun J.P., Gabrielsen R.H., Huismans R.S., 2013. Control of lithosphere rheology on subduction polarity at initiation : Insights from 3D analogue modelling. Earth and Planetary Science Letters, 361, 219-228, doi: 10.1016/j.epsl. 2012.10.026
[22] Reber, J.E., Galland, O., Cobbold, P.R., Le Carlier de Veslud, C. 2013. Experimental study of sheath fold development around a weak inclusion in a mechanically layered matrix. Tectonophysics, 586, 130-144, doi:10.1016/j.tecto. 2012.11.013.
[23] Soleimany, B., T. Nalpas, F. Sàbat, 2013. Role of the compression angle on the reactivation of an inverse fault. Geologica Acta, 11, 265-276.
[24] Artym I.V. Otsinka tektonichnoi trishchynuvatosti porid-kolektoriv za dopomohoiu metodu skinchennykh elementiv. Molodyi vchenyi. Heolohichni nauky. 2018. No 2. P. 6-10. DOI: 10.32839.
[25] Kurovets S., Artym I. Reservoir rocks fracturing model development. East European Science Journal. 2019. No 3. P. 24-29. ISSN: 2468-5380.
[26] Kurovets S.S., Artym I.V. Otsinka vplyvu rozkydu znachen mekhanichnykh kharakterystyk porid-kolektoriv Prykarpattia na yikh tektonichnu trishchynuvatist. Naftohazova haluz Ukrainy. 2019. No 2. P. 19-33. [in Ukrainian]
[27] Kurovets S. S., Artym I. V., Zderka T. V. (2020). Aprobatsiia tektonofizychnoi modeli otsiniuvannia trishchynuvatosti na rodovyshchakh Vnutrishnoi zony Peredkarpatskoho prohynu. Naftohazova enerhetyka, No 2 (34). P. 15-25. https://doi.org/10.31471/1993-9868-2020-2(34)15-25 [in Ukrainian]