Analysis of the stress state of rocks transformation near a horizontal well during acid treatment based on numerical simulation
The article presents an overview of the assessment and modelling of the stress state of rocks in the near-wellbore zone of horizontal wells during acid stimulation of the formation for improving the efficiency of oil and gas field development. A numerical finite element model of near-wellbore zone o...
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| Format: | Article |
| Language: | English |
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Saint-Petersburg Mining University
2025-04-01
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| Series: | Записки Горного института |
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| Online Access: | https://pmi.spmi.ru/pmi/article/view/16413?setLocale=en_US |
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| author | Sergei N. Popov Sergei E. Chernyshov Xiaopu Wang |
| author_facet | Sergei N. Popov Sergei E. Chernyshov Xiaopu Wang |
| author_sort | Sergei N. Popov |
| collection | DOAJ |
| description | The article presents an overview of the assessment and modelling of the stress state of rocks in the near-wellbore zone of horizontal wells during acid stimulation of the formation for improving the efficiency of oil and gas field development. A numerical finite element model of near-wellbore zone of the reservoir drilled by a horizontal section was compiled using one of oil fields in the Perm Territory as an example. The distribution of physical and mechanical properties of the terrigenous reservoir near the well was determined considering transformation under the action of mud acid for different time periods of its injection. Multivariate numerical simulation was performed and the distribution of horizontal and vertical stresses in near-wellbore zone was determined with regard for different values of pressure drawdown and changes in stress-strain properties depending on the area of mud acid infiltration. It was found that a change in elastic modulus and Poisson's ratio under the influence of acid led to a decrease in stresses in near-wellbore zone. Analysis of the stress distribution field based on the Coulomb – Mohr criterion showed that the minimum safety factor of rock even after the effect of mud acid was 1.5; thus, under the considered conditions of horizontal well modelling, the reservoir rock remained stable, and no zones of rock destruction appeared. |
| format | Article |
| id | doaj-art-2b0c1463edf1435ba95970091dcd8b6e |
| institution | OA Journals |
| issn | 2411-3336 2541-9404 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Saint-Petersburg Mining University |
| record_format | Article |
| series | Записки Горного института |
| spelling | doaj-art-2b0c1463edf1435ba95970091dcd8b6e2025-08-20T02:13:22ZengSaint-Petersburg Mining UniversityЗаписки Горного института2411-33362541-94042025-04-0127211011816413Analysis of the stress state of rocks transformation near a horizontal well during acid treatment based on numerical simulationSergei N. Popov0https://orcid.org/0000-0002-1110-7802Sergei E. Chernyshov1https://orcid.org/0000-0002-2034-3014Xiaopu Wang2https://orcid.org/0000-0003-1013-2691Oil and Gas Research Institute, RASPerm National Research Polytechnic UniversityChina University of PetroleumThe article presents an overview of the assessment and modelling of the stress state of rocks in the near-wellbore zone of horizontal wells during acid stimulation of the formation for improving the efficiency of oil and gas field development. A numerical finite element model of near-wellbore zone of the reservoir drilled by a horizontal section was compiled using one of oil fields in the Perm Territory as an example. The distribution of physical and mechanical properties of the terrigenous reservoir near the well was determined considering transformation under the action of mud acid for different time periods of its injection. Multivariate numerical simulation was performed and the distribution of horizontal and vertical stresses in near-wellbore zone was determined with regard for different values of pressure drawdown and changes in stress-strain properties depending on the area of mud acid infiltration. It was found that a change in elastic modulus and Poisson's ratio under the influence of acid led to a decrease in stresses in near-wellbore zone. Analysis of the stress distribution field based on the Coulomb – Mohr criterion showed that the minimum safety factor of rock even after the effect of mud acid was 1.5; thus, under the considered conditions of horizontal well modelling, the reservoir rock remained stable, and no zones of rock destruction appeared.https://pmi.spmi.ru/pmi/article/view/16413?setLocale=en_UShorizontal wellstress-strain propertiesnear-wellbore zonenumerical modelfinite element methodstress statestrength safety factoracid treatmentwellbore wall stability |
| spellingShingle | Sergei N. Popov Sergei E. Chernyshov Xiaopu Wang Analysis of the stress state of rocks transformation near a horizontal well during acid treatment based on numerical simulation Записки Горного института horizontal well stress-strain properties near-wellbore zone numerical model finite element method stress state strength safety factor acid treatment wellbore wall stability |
| title | Analysis of the stress state of rocks transformation near a horizontal well during acid treatment based on numerical simulation |
| title_full | Analysis of the stress state of rocks transformation near a horizontal well during acid treatment based on numerical simulation |
| title_fullStr | Analysis of the stress state of rocks transformation near a horizontal well during acid treatment based on numerical simulation |
| title_full_unstemmed | Analysis of the stress state of rocks transformation near a horizontal well during acid treatment based on numerical simulation |
| title_short | Analysis of the stress state of rocks transformation near a horizontal well during acid treatment based on numerical simulation |
| title_sort | analysis of the stress state of rocks transformation near a horizontal well during acid treatment based on numerical simulation |
| topic | horizontal well stress-strain properties near-wellbore zone numerical model finite element method stress state strength safety factor acid treatment wellbore wall stability |
| url | https://pmi.spmi.ru/pmi/article/view/16413?setLocale=en_US |
| work_keys_str_mv | AT sergeinpopov analysisofthestressstateofrockstransformationnearahorizontalwellduringacidtreatmentbasedonnumericalsimulation AT sergeiechernyshov analysisofthestressstateofrockstransformationnearahorizontalwellduringacidtreatmentbasedonnumericalsimulation AT xiaopuwang analysisofthestressstateofrockstransformationnearahorizontalwellduringacidtreatmentbasedonnumericalsimulation |