Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling
The article presents the results of analysing geological structure of the Famennian deposits (Devonian) in the Perm Region. Numerical modelling of the distribution of inhomogeneous stress field near the well was performed for the two considered types of perforation. With regard for the geometry of t...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Saint-Petersburg Mining University
2022-11-01
|
| Series: | Записки Горного института |
| Subjects: | |
| Online Access: | https://pmi.spmi.ru/index.php/pmi/article/view/15703?setLocale=en_US |
| _version_ | 1797947232472793088 |
|---|---|
| author | Sergey E. Chernyshov Sergey N. Popov Stanislav V. Varushkin Aleksandr A. Melekhin Sergey N. Krivoshchekov Shaoran Ren |
| author_facet | Sergey E. Chernyshov Sergey N. Popov Stanislav V. Varushkin Aleksandr A. Melekhin Sergey N. Krivoshchekov Shaoran Ren |
| author_sort | Sergey E. Chernyshov |
| collection | DOAJ |
| description | The article presents the results of analysing geological structure of the Famennian deposits (Devonian) in the Perm Region. Numerical modelling of the distribution of inhomogeneous stress field near the well was performed for the two considered types of perforation. With regard for the geometry of the forming perforation channels, numerical finite element models of near-wellbore zones were created considering slotted and cumulative perforation. It is ascertained that in the course of slotted perforation, conditions are created for a significant restoration of effective stresses and, as a result, restoration of reservoir rock permeability. Stress recovery area lies near the well within a radius equal to the length of the slots, and depends on the drawdown, with its increase, the area decreases. From the assessment of failure areas, it was found that in case of slotted perforation, the reservoir in near-wellbore zone remains stable, and failure zones can appear only at drawdowns of 10 MPa and more. The opposite situation was recorded for cumulative perforation; failure zones near the holes appear even at a drawdown of 2 MPa. In general, the analysis of results of numerical simulation of the stress state for two simulated types of perforation suggests that slotted perforation is more efficient than cumulative perforation. At the same time, the final conclusion could be drawn after determining the patterns of changes in permeability of the considered rocks under the influence of changing effective stresses and performing calculations of well flow rates after making the considered types of perforation channels. |
| first_indexed | 2024-04-10T21:24:36Z |
| format | Article |
| id | doaj.art-0e5ac8cfcea74e828f26d5bfdbe37596 |
| institution | Directory Open Access Journal |
| issn | 2411-3336 2541-9404 |
| language | English |
| last_indexed | 2024-04-10T21:24:36Z |
| publishDate | 2022-11-01 |
| publisher | Saint-Petersburg Mining University |
| record_format | Article |
| series | Записки Горного института |
| spelling | doaj.art-0e5ac8cfcea74e828f26d5bfdbe375962023-01-20T02:04:52ZengSaint-Petersburg Mining UniversityЗаписки Горного института2411-33362541-94042022-11-0125773274310.31897/PMI.2022.5115703Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modellingSergey E. Chernyshov0https://orcid.org/0000-0002-2034-3014Sergey N. Popov1https://orcid.org/0000-0002-1110-7802Stanislav V. Varushkin2https://orcid.org/0000-0002-2166-9550Aleksandr A. Melekhin3https://orcid.org/0000-0002-0737-1360Sergey N. Krivoshchekov4https://orcid.org/0000-0002-9748-6291Shaoran Ren5https://orcid.org/0000-0002-0829-3704Perm National Research Polytechnic UniversityInstitute of Oil and Gas Problems of the Russian Academy of SciencesOOO “LUKOIL-PERM”Perm National Research Polytechnic UniversityPerm National Research Polytechnic UniversityChina University of PetroleumThe article presents the results of analysing geological structure of the Famennian deposits (Devonian) in the Perm Region. Numerical modelling of the distribution of inhomogeneous stress field near the well was performed for the two considered types of perforation. With regard for the geometry of the forming perforation channels, numerical finite element models of near-wellbore zones were created considering slotted and cumulative perforation. It is ascertained that in the course of slotted perforation, conditions are created for a significant restoration of effective stresses and, as a result, restoration of reservoir rock permeability. Stress recovery area lies near the well within a radius equal to the length of the slots, and depends on the drawdown, with its increase, the area decreases. From the assessment of failure areas, it was found that in case of slotted perforation, the reservoir in near-wellbore zone remains stable, and failure zones can appear only at drawdowns of 10 MPa and more. The opposite situation was recorded for cumulative perforation; failure zones near the holes appear even at a drawdown of 2 MPa. In general, the analysis of results of numerical simulation of the stress state for two simulated types of perforation suggests that slotted perforation is more efficient than cumulative perforation. At the same time, the final conclusion could be drawn after determining the patterns of changes in permeability of the considered rocks under the influence of changing effective stresses and performing calculations of well flow rates after making the considered types of perforation channels.https://pmi.spmi.ru/index.php/pmi/article/view/15703?setLocale=en_USwell completionperforation methodsnumerical simulationeffective stressesreservoir permeability |
| spellingShingle | Sergey E. Chernyshov Sergey N. Popov Stanislav V. Varushkin Aleksandr A. Melekhin Sergey N. Krivoshchekov Shaoran Ren Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling Записки Горного института well completion perforation methods numerical simulation effective stresses reservoir permeability |
| title | Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling |
| title_full | Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling |
| title_fullStr | Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling |
| title_full_unstemmed | Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling |
| title_short | Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling |
| title_sort | scientific justification of the perforation methods for famennian deposits in the southeast of the perm region based on geomechanical modelling |
| topic | well completion perforation methods numerical simulation effective stresses reservoir permeability |
| url | https://pmi.spmi.ru/index.php/pmi/article/view/15703?setLocale=en_US |
| work_keys_str_mv | AT sergeyechernyshov scientificjustificationoftheperforationmethodsforfamenniandepositsinthesoutheastofthepermregionbasedongeomechanicalmodelling AT sergeynpopov scientificjustificationoftheperforationmethodsforfamenniandepositsinthesoutheastofthepermregionbasedongeomechanicalmodelling AT stanislavvvarushkin scientificjustificationoftheperforationmethodsforfamenniandepositsinthesoutheastofthepermregionbasedongeomechanicalmodelling AT aleksandramelekhin scientificjustificationoftheperforationmethodsforfamenniandepositsinthesoutheastofthepermregionbasedongeomechanicalmodelling AT sergeynkrivoshchekov scientificjustificationoftheperforationmethodsforfamenniandepositsinthesoutheastofthepermregionbasedongeomechanicalmodelling AT shaoranren scientificjustificationoftheperforationmethodsforfamenniandepositsinthesoutheastofthepermregionbasedongeomechanicalmodelling |