Neftyanaya Provintsiya 


On dependence of minimum horizontal stress on extent of pressure decline in Devonian terrigenous reservoirs of Romashkinskoye field Minnibaevskaya area

I.I. Girfanov



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For practical application of geomechanical tools in PJSC TATNEFT, methods to calculate the stress state of rocks taking into account regional features are required. Commercial development of terrigenous deposits of the Romashkinskoye field has resulted in reservoir pressure depletion and the associated change in effective stresses. The minimum horizontal stress can be determined through hydrofrac data or calculated using values of vertical rock stress, formation pressure, and Poisson's ratio of producing rocks. The paper discusses analysis of pressure behavior during hydraulic fracturing to determine the current minimum horizontal stress. Procedure of calculating of vertical stress and the original reservoir pressure to obtain the values of initial minimum stresses in the fracked intervals of wells under study is presented. Difference between the initial and the current stress states in the target intervals of hydraulic fracturing in the Kynovskian and the Pashiyan horizons was determined. By the example of the Minnibaevskaya area of the Romashkinskoye field, change in the minimum horizontal stress vs. decline of reservoir pressure in the Devonian terrigenous productive formations was determined.

Key words:

minimum horizontal stress, matrix stress ratio, fracture analysis, G-function, horizontal stress variation, formation depletion, stress path, Biot coefficient.



  1. Adushkin V.V., Rodionov V.N., Turuntaev S.B., Yudin A.E. Sejsmichnost mestorozhdenij uglevodorodov [Seismicity of hydrocarbon fields]. Neftegazovoe obozrenie, 2000, Vol. 5, No. 1. pp. 4-15 (in Russian)

  2. Buryj A., Klokova L. Sejsmoopasnyj biznes [Quake-endangered business]. Kompaniya, 1998, No. 13. pp. 13-16 (in Russian)

  3. Eaton B.A. Fracture gradient prediction and its application in oilfield operations. Journal of Petroleum Technology, 1969, Vol. 21, No. 10. pp. 1353-1360

  4. Dinnik A.N. O davlenii gornyh porod i raschet krepi krugloj shahty [On overburden pressure and calculation of circular shaft lining] Inzhenernyi rabotnik, 1925, No. 7. pp. 1‑12 (in Russian)

  5. Tiab D., Donaldson E. Petrofizika: teoriya i praktika izucheniya kollektorskih svojstv gornyh porod i dvizheniya plastovyh flyuidov [Petrophysics: Theory and Practice of Measuring Reservoir Rock and Fluid Transport Properties]. Translated from English by Uglov M.D., edited by Petersilie V.I., Bylevskiy G.A. 2nd Edition. Moscow: Premium Inzhiniring Publ., 2009. 838 p.

  6. Barree R.D., Barree V.L., Craig D. Holistic fracture diagnostics: consistent interpretation of prefrac injection tests using multiple analysis methods. SPE Production & Operations, 2007, Vol. 24, Issue 3. pp. 396-406

  7. Lorenz J.C. [et al.] Regional Fractures I: A Mechanism for the Formation of Regional Fractures at Depth in Flat-Lying Reservoirs. AAPG Bulletin, 1991, Vol. 75, No. 11 (November). pp. 1714-1737

  8. Zoback Mark D. Geomekhanika neftyanyh zalezhej [Reservoir Geomechanics] Translated from English by Frik V.L., edited by specialists of OOO Gazpromneft NTC (Moscow) Izhevsk: Institut kompyuternyh issledovanij Publ., 2018. 479 p.

  9. Biot M. A., Willis D.G. The elastic coefficients of the theory of consolidation. Journal of Applied Mechanics, 1957, No. 24. pp. 594–601

  10. He J., Ling К. A New Method to Determine Biot Coefficients of Bakken Samples. 48th  US Rock Mechanics/Geomechanics Symposium in Minneapolis, USA, 1-4 June 2014.

  11. Qiao L.P., Wong R.C.K., Aguilera R., and A. Kantzas. Determination of Biot's effective-stress coefficient for permeability of Nikanassin sandstone. Journal of Canadian Petroleum Technology, May 2012, Vol. 53, Iss. 03

  12. Gray I. Effective stress in rock, in J Wesseloo (ed.). Proceedings of the 8th International Conference on Deep and High Stress Mining, Australian Centre for Geomechanics, Perth. 2017. pp. 199-207

  13. Detournay E., Cheng A.H.-D. Fundamentals of poroelasticity. Edited by Fairhurst C. Chapter 5 in Comprehensive Rock Engineering: Principles, Practice and Projects, Vol. 2: Analysis and Design Methods. Pergamon Press Publ., 1993, pp. 113–171

  14. Franquet J.A., Abass H.H. Rock Mechanics for Industry, in B Amadei, RL Kranz, GA Scott & PH Smeallie (eds), Balkema, Rotterdam, 1999, pp. 349–355.


I.I. Girfanov, Junior Research Engineer, Core Analysis, PVT and Well Testing Department, TatNIPIneft Institute–PJSC TATNEFT

32, Musa Jalil st., Bugulma, 423236, Russian Federation


For citation:

I.I. Girfanov O zavisimosti minimal'nogo gorizontal'nogo naprjazhenija ot stepeni snizhenija plastovoj jenergii v produktivnyh ot-lozhenijah terrigennogo devona Minnibaevskoj ploshhadi Romashkinskogo mestorozhdenija [On dependence of minimum horizontal stress on extent of pressure decline in Devonian terrigenous reservoirs of Romashkinskoye field Minnibaevskaya area]. Neftyanaya Provintsiya, No. 4(24), 2020. pp.107-119. DOI (in Russian)


   © I.I. Girfanov, 2020

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