Thematic index of articles

Journal V.25.No.2.2023
Pages
Download article

Study of texture changes in the emptiness of rocks under the tension conditions by electron microscopy methods

B.M. Osovetsky, K.P. Kazymov, I.Yu. Kolychev, Ya.V. Savitckii, S.V. Galkin

Original article

DOI https://doi.org/10.18599/grs.2023.2.16

228-235
rus.

open access

Under a Creative Commons license

On the example of an oil deposit of the Vereisk age which is one of the deposits in the Volga-Urals, lithotypes of rocks are distinguished, characterized by a fundamentally different structure of the void space. For selected lithotypes experiments were carried out on core samples with a change in the stress state of rocks under conditions of volumetric (pseudo-triaxial) compression. The pressure created in the experiments is identified with the development of processes at a distance from the epicenter of the hydraulic fractures appearance. Core samples were studied before and after exposure by non-destructive testing methods. The study of the sample structures by standard and tomographic methods did not allow us to establish significant changes during loading of the samples. At the same time, some increase in rock permeability was established in experiments. With this in mind, the samples were studied according to a technique specially developed by the authors using electron microscopy. The use of microscopic studies made it possible to obtain quantitative information about the change in the void space at a level inaccessible to X-ray tomography. As a result, it was found that both for potential reservoirs and for impermeable rocks, there is an increase in the length and opening of pre-existing fractures, which can be considered as the formation of additional effective fluid filtration channels. The experiments performed have changed the idea of ​​the process of hydraulic fracture development and can be used in geological and technological calculations.

 

hydraulic fracturing, core, experimental loading of samples, fracturing, tomography, electron microscopy

 

  • Cherepanov S.S., Ponomareva I.N., Erofeev A.A., Galkin S.V. (2014). Determination of fractured rock parameters based on a comprehensive analysis of the data core studies, hydrodynamic and geophysical well tests. Neftyanoe Khozyaistvo = Oil Industry, (2), pp. 94–96. (In Russ.)
  • Galkin S.V., Martyushev D.A., Osovetsky B.M., Kazymov K.P., Song H. (2022). Evaluation of void space of complicated potentially oil-bearing carbonate formation using X-ray tomography and electron microscopy methods. Energy Reports, 8, pp. 6245–6257. https://doi.org/10.1016/j.egyr.2022.04.070
  • Galkin S., Savitckii Ia., Shustov D., Kukhtinskii A., Osovetsky B.,  Votinov A. (2023). Modeling of crack development associated with proppant hydraulic fracturing in a clay-carbonate oil deposit. Fluid Dynamics Materials Processing, 19(2), pp. 273–284. https://doi.org/10.32604/fdmp.2022.021697
  • Galyanova T.I., Pimenov Y.G., Proshlyakov B.K., (1987). Collector properties of sedimentary rocks in big depths. Moscow: Nedra, 200 p. (In Russ.)
  • Garshina O.V., Kazakov D.A., Nekrasova I.L., Khvoshchin P.A., Predein A.A., Kazymov K.P., Zhdanov V.M., Osovetsky B.M., Konesev G.V. (2020). Application of X-ray tomography method for estimation of drilling agents influence on sedimentary rocks in the process of borehole drilling and completion. Neftyanoe Khozyaistvo = Oil Industry, (6), pp. 40–44. (In Russ.) https://doi.org/10.24887/0028-2448-2020-6-40-44
  • Ghadami N., Rasaei M.R., Hejri Sh., Sajedian A., Afsari K. (2015). Consistent  porosity – permeability modeling, reservoir rock typing and hydraulic flow unitization in a giant carbonate reservoir. Journal of Petroleum Science and Engineering, 131, pp. 58−69. https://doi.org/10.1016/j.petrol.2015.04.017
  • Gilaev Gen.G., Khabibullin, M.Ya.,Gilaev G.G. (2020). Basic Aspects of Using Acid Gel for Propant Injection During Fracturing Works in Carbonate Reservoirs in the Volga-Ural Region. SOCAR Proceedings, 4, pp. 33–41. (In Russ.)
  • Isakova T.G., Dyakonova T.F., Nosikova A.D., Kalmykov D.A., Akinshin A.V., Yatsenko V.M. (2021). Prognosis valuation of thin-layered collector filtration capacity of Nikulovskaya suite under the results of kern study and GIS. Georesursy = Georesources, 23(2), pp. 170–178. (In Russ.) https://doi.org/10.18599/grs.2021.2.17
  • Jin G., Xing H., Li T., Zhang R., Liu J., Guo Z., Ma Z. (2022) An integrated approach of numerical well test for well intersecting fractures based on FMI image. Lithosphere, 4421135. https://doi.org/10.2113/2022/4421135
  • Ketova Y.A., Galkin S.V., Kolychev I.J. (2021). Evaluation and X-Ray tomography analysis of super-absorbent polymer for water management in high salinity mature reservoirs. Journal of Petroleum Science and Engineering, 196, 107998. https://doi.org/10.1016/j.petrol.2020.107998
  • Khisamov R.S., Khazipov R.G., Bazarevskaya V.G., Abdullin R.N., Rakhmatullina A.R. (2014). Studying the structure of void space of complex carbonate rocks of the kashirskian horizon using electric microscanning technique. Geologiya nefti i gaza = Oil and gas geology, (3), pp. 47–53. (In Russ.)
  • Khizhniak G.P., Amirov A.M., Gladkikh E.A., Kozlov A.A., Kolesov V.A., Zakharian A.G., Pestrikov A.V., Chikin A.E., Komin M.A., Harris R. (2015). Laboratory tests of DEEPAacid-generatingcompound. Bulletin of PNRPU. Vestnik PNIPU. Geologiya. Neftegazovoe i gornoe delo, 14, рр.18–31. (In Russ.) DOI: 10.15593/2224-9923/2015.14.3
  • Li J., Zhao G., Jia X., Yuan W. (2017). Integrated study of gas condensate reservoir characterization through pressure transient analysis. Journal of Natural Gas Science and Engineering, 46, pp. 160−171. https://doi.org/10.1016/j.jngse.2017.07.017
  • Makhmutov I.K., Salimov O.V., Girfanov I.I., Ziyatdinov R.Z., Mansurov A.U., Kochetkov A.V. (2017). The results of scientific-technical accompaniment of works in the sphere of hydrofracturing. Georesursy = Georesources, 19(4), pp. 374–378. (In Russ.). https:/ doi.org/10.18599/grs.19.4.11
  • Novokreshchennykh D.V., Raspopov A.V. (2020). Trends in improving hydraulic fracturing efficiency in carbonate deposits at Komi Republic and Nenets Autonomous District fields. Perm Journal of Petroleum and Mining Engineering, 20(2), pp.175–181. https:/ doi.org/10.15593/2224-9923/2020.2.7
  • Ravelev K.A., Vyatkin K.A., Ilyushin P.Yu. (2020). Creation of high-conductive filtration channels in core samples when simulating acid exposure at a filtering unit. Proceedings of higher educational establishments. Geology and Exploration, 63(5), pp. 17−27. (In Russ.). https://doi.org/10.32454/0016-7762-2020-63-5-17-27
  • Sokolov A.V., Shubina A.V. (2022). Reserves-to-production ratio – on the reliability of estimates. Georesursy = Georesources, 24(3), pp. 10–16. (In Russ.) https://doi.org/10.18599/grs.2022.3.2
  • Topal A.Y., Firsov V.V., Usmanov T.S., Zorin A.M., Khaidar A.M., Gorin A.N. (2020). Regional aspects of GRP in “Udmurtneft”. Neftyanoe Khozyaistvo = Oil Industry, (4), pp. 44–48. (In Russ.) https://doi.org/10.24887/0028-2448-2020-4-44-48
  • Xie F., Zhang C., Liu R., Xiao C. (2018). Production prediction for fracture – vug carbonate reservoir using electric imaging logging data. Petroleum Exploration and Development, 45(2), pp. 349−356. https://doi.org/10.11698/PED.2018.02.19
  •  

Boris M. Osovetsky – DSc (Geology and Mineralogy), Head of Mineralogy and Petrology Department, Perm State University
15, Bukirev st., Perm, 614990, Russian Federation

Konstantin P. Kazymov – PhD (Geology and Mineralogy), Associate Professor, Mineralogy and Petrology Department, Perm State University
15, Bukirev st., Perm, 614990, Russian Federation

Igor Y. Kolychev – PhD (Engineering), Engineer, Perm National Research Polytechnic University
29, Komsomolsky st., Perm, 614990, Russian Federation

Yan V. Savitckii – Senior Lecturer, Perm National Research Polytechnic University
29, Komsomolsky st., Perm, 614990, Russian Federation

Sergey V. Galkin – DSc (Geology and Mineralogy), Professor, Head of the Mining and Oil Faculty, Perm National Research Polytechnic University
29, Komsomolsky st., Perm, 614990, Russian Federation
e-mail: gnfd@pstu.ru

 

For citation:

Osovetsky B.M., Kazymov K.P., Kolychev I.Yu., Savitskii Ya.V., Galkin S.V. (2023). Study of texture changes in the emptiness of rocks under the tension conditions by electron microscopy methods. Georesursy = Georesources, 25(2), pp. 228–235. https://doi.org/10.18599/grs.2023.2.16

© 2023 The Authors. Published by Georesursy LLC