Neftyanaya Provintsiya
electronic peer-reviewed scholarly publication
Neftyanaya provintsiya No. 2(42), 2025

The influence of Afoninskaya strata's geological features for the Orenburg region reservoirs development parameters

R.Kh. Nizaev, R.I. Khafizov, A.D. Fateev
DOI: https://doi.org/10.25689/NP.2025.2.34-46

Abstract


Prospects for increasing oil production in the Orenburg region are primarily associated with the involvement of the deep-lying Afoninskaya formation carbonate reservoir in the development. The design oil recovery factor for the fields reaches 0.492. Theirs reservoir development is currently carried out at a low rate, which is largely due to geological features, as well as the use of traditional development treatment that have proven themselves well on terrigenous reservoirs. Due to the geological features of the Afoninskaya formation and the presence of secondary dolomites in it, traditional development treatment to them does not give high results. Therefore, further progress in the oil reservoir development represented by deep-lying carbonate formations is of strategic importance for the Orenburg region fields.

Key words:

carbonate deposits, injection well, hydrodynamic simulation, limestone, dolomite, depletion drive, producer well; acid fracturing of formation

References

1. Otchet «Stratigrafiya, litologiya i facii dopaleozojskih i paleozojskih otlozhenij novyh razvedochnyh ploshchadej Oreburgskoj oblasti» za 1981 -1983 gg [Stratigraphy, lithology and facies of Pre-Paleozoic and Paleozoic deposits in recent exploration areas in Orenburg region]. 1981 – 1983 Report. Yuzhno-Uralsky branch of VNIGNI. (in Russian)

2. Panteleev A.S., Kozlov N.F. Geologicheskoe stroenie i neftegazonosnost Orenburgskoj oblasti [Geology and hydrocarbon potential of the Orenburg region]. Orenburg: Orenburg Book Publ., 1977, 272 p. (in Russian)

3. Vilesov A.P., Chertina K.N., Vorontsov I.P., Devyatka N.P. Genezis dolomitovyh kollektorov bijsko-afoninskoj karbonatnoj tolshchi Orenburgskoj oblasti [Genesis of dolomitic reservoirs in Biysk-Afonian carbonate complex in Orenburg region]. Geology, Geophysics and Development of Oil and Gas Fields, No.11, 2014, pp. 25-34 (in Russian)

4. Panteleev A.S., Galimov A.G., Baranov V.K. Emkostnye i filtracionnye parametry karbonatnyh plastov kollektorov Zajkinskoj gruppy mestorozhdenij [Storage potential and flow properties of carbonate reservoirs in Zaikinsky group of fields]. Geology and Development of Oil and Gas Fields in Orenburg Region. Orenburg: Orenburg Book Publ., 1999, pp. 228–236 (in Russian)

5. Makarova S.P. Geologicheskoe stroenie nizhne-srednedevonskih otlozhenij yugo-vostoka Orenburgskoj oblasti [Geology of Lower and Middle-Devonian deposits in the south-east of Orenburg region]. Geology and Development of Oil and Gas Fields in Orenburg Region. Orenburg, 1999, pp. 65–68 (in Russian)

6. Gorozhanina E.N., Karnaukhov S.M., Poberezhsky S.M., Gorozhanin V.M., Pazukhin V.N., Kulagina E.I., Kochetova N.N., Remizova S.T., Chibrikova E.V. Etalonnyj razrez paleozojskih otlozhenij Severnogo Prikaspiya po dannym bureniya skvazhiny 20 Peschanoj ploshchadi [Reference section of Paleozoic deposits in the Northern Pre-Caspian based on Well 20 drilling logs in the Peschanaya area]. Geology and Development of Oil and Gas Fields in Orenburg Region. Orenburg: Yuzhny Ural Publ., 2007, pp. 73–86 (in Russian)

7. Gorozhanina E.N. Tipy karbonatnyh platform YUzhnogo Urala i Priuralya, ih svyaz s neftegazonosnostyu [Types of carbonate platforms in the Southern Urals and Transurals and their relation to oil and gas potential]. Proceedings of the VIII Research and Practice Conference “Geology, minerals and geo-environmental problems of Bashkortostan, the Urals and bordering regions”. Ufa, 2010, pp. 188–191 (in Russian)

8. Gorozhanina E.N. Tipy osadochnyh bassejnov devona YUzhnogo Urala i vostochnoj okrainy Russkoj platformy [Types of Devonian sedimentary basins in the Southern Urals and the eastern border land of the Russian platform]. Leningrad School of Lithology: Proceedings of the Russian Lithological Conference (St.-Petersburg, September 25-29, 2012). Vol.1, St.-Petersburg: St. Petersburg State University, 2012, pp. 44-46 (in Russian)

Authors

R.Kh. Nizaev, Doctor of Technical Sciences, Leading Specialist, TatNIPIneft Institute of PJSC Tatneft
4, M. 2nd Lesnaya Str., Bugulma, 423233, Russian Federation
E-mail nizaev@tatnipi.ru

R.I. Khafizov, Candidate of Technical Sciences (PhD), Chief Specialist, Peter the Great St.Petersburg Polytechnic University
29, Politekhnicheskaya Str., Building B, St. Petersburg, 195251, Russian Federation
E-mail: ruslanxxx171@mail.ru

A.D. Fateev, Assistant, National Research University ITMO
49, Kronverksky pr., St. Petersburg, 197101, Russian Federation
E-mail: fateev.arseny@yandex.ru

For citation:

R.Kh. Nizaev, R.I. Khafizov, A.D. Fateev Vliyaniye geologicheskikh osobennostey afoninskoy tolshchi na tekhnologicheskiye pokazateli razrabotki mestorozhdeniya Orenburgskoy oblasti [The influence of Afoninskaya strata's geological features for the Orenburg region reservoirs development parameters] Neftyanaya Provintsiya, No. 2(42), 2025. pp. 34-46. DOI https://doi.org/10.25689/NP.2025.2.34-46. EDN WKEIBG (in Russian)

© Non-governmental organization Volga-Kama Regional Division of the Russian Academy of Natural Science, 2015-2025 All the materials of the journal are available under the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/)