Download article

Analysis of wells cement sheath stability during shaped charge perforating based on geomechanical modeling

S.E. Chernyshov, S.N. Popov, A.D. Savich, V.V. Derendyaev

Original article



open access

Under a Creative Commons license

Well cement sheath stability analysis for two oil-producing wells in the completion of productive formations by shaped charge perforating was performed. The data of direct measurements of pressures in the borehole at different distances from the cable head of the perforating tool at the moment of detonation, which exceeded 50 MPa, were used in the studies. The pressure values were approximated along the wellbore using a power law. To reliably predict the stress-strain state of the near-wellbore zone of the perforation interval, the ANSYS finite-element modeling software was used. To determine the stress field, an axisymmetric finite-element calculation scheme was built, the height of the model along the wellbore was 39 m. During modeling, it was taken into account that the geological and physical parameters of the simulated reservoirs differed in depth and reservoir pressure value were different. Elastic-strength properties of the cement stone formed were determined during the laboratory experiments for different recipes of cement slurries. According to the results of modeling, the areas of destruction and strength reserve of cement stone, as well as the values of radial displacement of the production casing in the perforation interval were determined. The developed model of the near-wellbore zone and methodical approaches can be used in future for choosing optimal elastic and strength properties of cement stone, perforation tools and technological parameters of perforating-explosive operations.


well completion, productive reservoir, well cement sheath safety, numerical finite-element model, near-wellbore zone, cement stone, wells cement sheath loads, shaped charge perforating


  • Agzamov F.A., Makhmutov A.N., Tokunova E.F. (2019). Study of corrosion stability of a cement stone in magnesia aggressive environment. Georesursy = Georesources, 21(3), pp. 73–78.
  • Ashikhmin S.G., Chernyshov S.E., Kashnikov Yu.A., Macdonald D.I.M. (2018). A geomechanical analysis of the influence of orientation and placement of jet slots on terrigenous reservoir permeability. Neftyanoe khozyaystvo = Oil Industry, (6), pp. 132–135. (In Russ.)
  • Chernikov A.D., Eremin N.A., Stolyarov V.E., Sboev A.G., Semenova-Chashchina O.K., Fitzner L.K. (2020). Application of artificial intelligence methods for identifying and predicting complications in the construction of oil and gas wells: problems and solutions. Georesursy = Georesources, 22(3), pp. 87–96.
  • Chernyshov S.E., Popov S.N., Varushkin S.V., Melekhin A.A., Krivoshchekov S.N., Ren S. (2022). Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling. Journal of Mining Institute, 257, pp. 732–743.
  • Chernyshov S.E., Ashikhmin S.G., Kashnikov Yu.A., Savich A.D., Mosin A.V., Chukhlov A.S. (2021). Evaluation of the cement sheath safety after shaped charge perforation considering the criterion of cement stone destruction. Neftyanoe khozyaystvo = Oil Industry, (6), pp. 50–53. (In Russ.)
  • Chernyshov S.E., Galkin S.V., Krisin N.I., Turbakov M.S., Riabokon E.P. (2015). Efficiency improvement of abrasive jet perforation. SPE Annual Caspian Technical Conference and Exhibition, CTCE 2015.
  • Chernyshov S.E., Kunitskikh A.A., Votinov M.V. (2015). Research of hydration dynamics and development of expanding additives to oil-well cement. Neftyanoe khozyaystvo = Oil Industry, (8), pp. 42–44. (In Russ.)
  • Gaivoronskiy I.N., Kostitsyn V.I., Savich A.D., Chernykh I.A., Shumilov A.V. (2016). Ways of improvement of reservoir completion efficiency. Neftyanoe khozyaystvo = Oil Industry, (10), pp. 62–65. (In Russ.)
  • Krylov D.A., Marabaev N.A., Talamanov E.N., Burkhailo V.A., Serenko I.A. (1981). Changes in the contact between cement stone and casing metal under different mechanical influences. Burenie, 7, pp. 18–21. (In Russ.)
  • Krysin N.I., Ryabokon E.P., Turbakov M.S., Chernyshov S.E., Shcherbakov A.A. (2016). Improvement of devices of abrasive jet perforation in oil wells. Neftyanoe khozyaystvo = Oil Industry, (8), pp. 129–131. (In Russ.)
  • Pairwise grouping of charges in a perforator. «Promperforator». (In Russ.) 
  • Popov S., Chernyshov S., Gladkikh E. (2023). Experimental and numerical assessment of the influence of bottomhole pressure drawdown on terrigenous reservoir permeability and well productivity. Fluid Dynamics and Materials Processing, 19(3), pp. 619–634.
  • Popov S.N. (2021). Determination of the safety factor of cement stone based on numerical modeling of the stress-strain state of the near-wellbore zone, taking into account the change in the elastic-strength properties of cement during its hardening and under the influence of an acid reagent. SOCAR Proceeding, S2, pp. 8–16. (In Russ.)
  • Popov S.N. (2022). Geomechanical modeling and the casing stability analysis in conditions of cement stone partial absence. SOCAR Proceeding, S2, pp. 45–51. (In Russ.)
  • Popov S.N., Chernyshov S.E., Gladkikh E.A. (2022). Influence of sandstone reservoir deformations during bottomhole and reservoir pressure decreasing on the permeability and well productivity changes. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 333(9), pp. 148–157. (In Russ.)
  • Rastegar R., Munawar M., Nowowiejski D., Granberg S., Cathrine Mehus, Benson A. (2015). Mitigating formation damage by using completion with built-in-casing perforations instead of perforation with explosive charges. SPE European Formation Damage Conference and Exhibition.
  • Savich A.D., Elkind S.Y. (2003). Completion of productive reservoirs. Technique and Technology. Karotazhnik, 106, pp. 120–134. (In Russ.)
  • Savich A.D., Shumilov A.V., Salnikova O.L., Ziyangirov R.M., Chernykh I.A. (2020). Evaluation of the cumulative perforation effect on the well support. Karotazhnik, 306(6), pp. 53–71. (In Russ.)
  • Semenov B.A., Sementsov A.A., Rutskiy A.M. (1996). Neutralization of fugitive action of band shaped charge perforators of type PKS-80. Geophysical methods of prospecting and exploration of oil and gas fields. Perm: PSU, pp. 82–85.
  • Seryakov A.V., Podberezhny M.Y., Bocharov O.B., Azamatov O.B. (2020). Junction zone stability in coaxial wells of different diameters (on the example of the Khanty-Mansi Autonomous District oil field). Georesursy = Georesources, 22(3), pp. 68–76. 
  • Shishin K.A., Rustambekov T.F., Krylov D.A. (1977). Influence of pressure testing and well perforation on the quality of reservoir separation. Burenie, 4, pp. 29–34. (In Russ.)
  • Zamakhayev V.S., Konchakov V.N. (1987). Instruction for completion with gun perforators in exploratory cased oil and gas wells, approved by the Ministry of Geology and Mineral Resources of the USSR. Funds of VNIPIvzryvzryvgeofizika. (In Russ.)

Sergei E. Chernyshov – Dr. Sci. (Engineering), Associate Professor, Professor of Oil and Gas Technologies Department, Perm National Research Polytechnic University
29, Komsomolsky ave., Perm, 614990, Russian Federation 

Sergey N. Popov – Dr. Sci. (Engineering), Head of the Laboratory, Chief Researcher of the Laboratory of oil-and-gas mechanics and reservoir physics and chemistry, Oil and Gas Research Institute of the Russian Academy Sciences
3, Gubkin st., Moscow, 119333, Russian Federation 

Anatoly D. Savich – Cand. Sci. (Engineering), Associate Professor, Department of Geophysics, Perm State National Research University
15, Bukireva st., Perm, 614990, Russian Federation 

Vadim V. Derendyaev – PhD student, Junior Researcher, Department of Oil and Gas Technologies, Perm National Research Polytechnic University
29, Komsomolsky ave., Perm, 614990, Russian Federation 


For citation:

Chernyshov S.E., Popov S.N., Savich A.D., Derendyaev V.V. (2023). Analysis of wells cement sheath stability during shaped charge perforating based on geomechanical modeling. Georesursy = Georesources, 25(2), pp. 245–253.