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Selection of optimal strength criteria for the terrigenous Pashiyan horizon of the Romashkinskoe field Tashliyarskaya area

I.I. Girfanov, M.M. Remeev, O.S. Sotnikov, A.A. Lutfullin, I.R. Muhliev

Original article

DOI https://doi.org/10.18599/grs.2019.4.114-118

114-118
rus.
eng.

open access

Under a Creative Commons license

In the process of oil reserves’ development, the in-situ stresses change. Knowledge of rock failure constraints will allow prediction of behavior of rock when subject to subsurface stress change. In this study, we used the results of studies of the Pashiyan sandstone core samples recovered from the Tashliyarskaya area well No. 14403. Six sets of samples, each consisting of three samples taken from the homogeneous intervals at the same depth, were used to determine the ultimate tensile strength, uniaxial and triaxial compressive strength in the in-situ conditions. An analysis of the methods for constructing a rock strength certificate, and comparison of the strength criteria described in State Standard 21153.8-88, the Mohr-Coulomb linear strength criterion and the non-linear Hoek-Brown criterion are provided. The Hoek-Brown criterion has the advantage of describing a non-linear increase in strength with an increase in overburden pressure and more adequately reflects the properties of rock. For the first time, a comparison of applicability of strength criteria obtained by different methods and based on the laboratory core analysis was made to determine their practical applicability. Comprehensive studies of the strength characteristics have never been previously conducted, and the results obtained will serve as the basis for further analysis and application in order to improve the development of the terrigenous Devonian Romashkinskoe field.
 

failure criterion, strength certificate, Mohr-Coulomb failure criterion, Hoek-Brown failure criterion, ultimate stress, tensile, uniaxial compression, triaxial compression

 

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Ildar I. Girfanov
TatNIPIneft Institute Tatneft PJSC
32, M.Djalil st., Bugulma, 423326, Russian Federation

Oleg S. Sotnikov
TatNIPIneft Institute TATNEFT PJSC
32, M.Djalil st., Bugulma, 423326, Russian Federation

Marat M. Remeev
TatNIPIneft Institute TATNEFT PJSC
32, M.Djalil st., Bugulma, 423326, Russian Federation

Azat A. Lutfullin
Tatneft PJSC
75, Lenin st., Almetyevsk, 423400, Russian Federation

Ilnur R. Mukhliev
EOR and Workover Operations Center Tatneft PJSC
88, Telman st., Almetyevsk, 423450, Russian Federation

 

For citation:

Girfanov I.I., Remeev M.M., Sotnikov O.S., Lutfullin A.A., Muhliev I.R. (2019). Selection of optimal strength criteria for the terrigenous Pashiyan horizon of the Romashkinskoe field Tashliyarskaya area. Georesursy = Georesources, 21(4), pp. 114-118. DOI: https://doi.org/10.18599/grs.2019.4.114-118