Application of geomechanical modeling tools to address the challenges associated with development of poorly cemented reservoirs

UDK: 622.276.031.011.43
DOI: 10.24887/0028-2448-2022-7-28-31
Key words: geomechanical modeling, reservoir geomechanics, uniaxial compressive strength, tensile strength, elastic properties, Young's modulus, Poisson's ratio, geomechanical properties, sand production
Authors: А.А. Lutfullin (Tatneft PJSC, RF, Almetyevsk), I.T. Usmanov (TatNIPIneft, RF, Bugulma), I.I. Girfanov (TatNIPIneft, RF, Bugulma), R.А. Khabibullin (TatNIPIneft, RF, Bugulma), О.S. Sotnikov (TatNIPIneft, RF, Bugulma)

The paper presents the results of studies of the effects of geomechanical factors on development of reservoirs confined to poorly cemented Tulskian sandstones. The study aims to assess the risks of irreversible reservoir changes in the interwell space due to deformations resulting from stresses beyond the elastic limit when reservoir pressure changes, provide recommendations on optimal bottomhole pressures for injection wells to ensure maximum injectivity, and determine critical drawdowns which result in carryover of solids into the wellbore for production wells. The results are based on 1D and 3D/4D geomechanical modeling. Input data used to build a geomechanical model included laboratory core study data and well logging data. Determination of elastic and strength properties, their dependence on other reservoir parameters and well logging data for each production target is a unique challenge. The paper presents the findings of geomechanical research efforts. The results of hydraulic fracturing processes analysis, downhole equipment maintenance data, reservoir pressure history, and well log interpretations were also used as input data. Laboratory core studies yielded the dependences on the parameters of radioactive logging methods (normalized gamma-ray logging, gamma-ray neutron logging) for estimation of geomechanical properties. Changes of the minimum horizontal stress with reservoir pressure variations were determined, recommended injection well overbalance ranges were obtained, analysis of solids carryover was conducted as well as calculations of critical drawdowns for production wells. Probability of irreversible reservoir changes in the interwell space for poorly cemented rocks was analyzed. Geomechanical modeling was conducted in GMS corporate software package of Tatneft PJSC.

References

1. Lutfullin A.A., Girfanov I.I., UsmanovI.T., Sotnikov O.S., Software for geomechanical simulation (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2021, no. 7, pp. 49-52, DOI: https://doi.org/10.24887/0028-2448-2021-7-49-52.

2. Girfanov I.I., Usmanov I.T., Relationships for determination of geomechanical properties for Romashkinskoye oil field conditions (In Russ.), Neftyanaya provintsiya, 2021, no. 3, pp. 57-66, DOI: https://doi.org/10.25689/NP.2021.3.57-66.

3. Stefanov Yu.P., Dilatation and compaction modes of deformation in localized shear zones (In Russ.), Fizicheskaya mezomekhanika, 2010, V. 13, Special Issue, p. 44-52.

4. Perkins T.K., Weingarten J.S., Stability and failure of spherical cavities in unconsolidated sand and weakly consolidated rock, SPE-18244-MS, 1988, DOI: https://doi.org/10.2118/18244-MS.

5. Yu Lu, Chengwen Xue, Tao Liu et al., Predicting the critical drawdown pressure of sanding onset for perforated wells in ultra-deep reservoirs with high temperature and high pressure, Energy Science & Engineering, 2021, V. 9, no. 9, pp. 1517-1529, DOI: https://doi.org/10.1002/ese3.922.


Attention!
To buy the complete text of article (a format - PDF) or to read the material which is in open access only the authorized visitors of the website can. .

Mobile applications

Read our magazine on mobile devices

Загрузить в Google play

Press Releases

20.09.2022
19.09.2022
15.09.2022