Mechanism of wellbore instability considering tubular-string contact with the wellbore wall [PDF]
Scientific ReportsExploration and development of deep and extended-reach wells faces extreme challenges including an extremely narrow mud weight window and complex well trajectories, with frequent occurrences of wellbore instability during drilling and completion ...
Yuting Zhou +7 more
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Chemical Effect on Wellbore Instability of Nahr Umr Shale [PDF]
The Scientific World Journal, 2013 Wellbore instability is one of the major problems that hamper the drilling speed in Halfaya Oilfield. Comprehensive analysis of geological and engineering data indicates that Halfaya Oilfield features fractured shale in the Nahr Umr Formation.
Baohua Yu, Chuanliang Yan, Zhen Nie
doaj +5 more sources
Wellbore stability model for argillaceous limestone - claystone thin interbeds under synergistic effect of fluctuating pressure -hydration [PDF]
Scientific ReportsThe effect of hydration and fluctuating pressure in drifting conditions presents challenges to wellbore stability, impacting cost savings and safety in drilling operations.
Kunhong Lv +6 more
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Evolution Law of Wellbore Instability Risk under Fluctuating Pressure
Energies, 2023 The bottom hole fluctuating pressure has a large influence on the wellbore instability. To address this problem, firstly, according to the principle of seepage mechanics, we established a calculation model of the change in pore pressure around the ...
Kai Zhao +4 more
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WELLBORE INSTABILITY: CAUSES AND CONSEQUENCES
Rudarsko-geološko-naftni Zbornik, 2007 Wellbore instability is one of the main problems that engineers meet during drilling. The causes of wellbore instability are often classified into either mechanical (for example, failure of the rock around the hole because of high stresses, low rock ...
Borivoje Pašić +2 more
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Managing the Risk of Wellbore Instability Using Geomechanical Modeling and Wellbore Stability Analysis for Muzhil Shale Formation in Gulf of Suez, Egypt [PDF]
JES: Journal of Engineering Sciences, 2023 Wellbore instability constitutes potential risks during wellbore drilling operation; these risks may cause complicated states, and in some cases, can lead to costly operational issues.
Ahmed Mohamed +3 more
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ELASTIC-PLASTIC SOLUTIONS FOR ANALYZING WELLBORE STABILITY [PDF]
Romanian Journal of Petroleum & Gas Technology, 2022 Selecting a good practical prediction method of wellbore instability has extensively become an important issue in order to overcome the resulting instability problems during drilling.
Mohamed Halafawi, Lazăr Avram
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Analytical model for studying the effect of weak bedding plane on wellbore stability [PDF]
International Journal of Mining and Geo-Engineering, 2023 Optimum mud weight estimation in wellbore is one of the most important steps to prevent instability. In wellbore stability studies, media (rock) is usually assumed to be isotropic but errors occur when weak bedding planes cause the rocks to be ...
Amin Ayeneh +2 more
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Shenzhen Daxue xuebao. Ligong ban, 2022 The complex features of the compound-salt formation result in wellbore instability during drilling operations. The mechanism of wellbore instability in compound-salt formation is studied by the analysis of mineral compositions, microstructures, physical ...
ZHAO Xin +5 more
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Geomechanics Analysis of Well Drilling Instability: A Review
Journal of Engineering, 2023 Wellbore instability is a significant problem faced during drilling operations and causes loss of circulation, caving, stuck pipe, and well kick or blowout. These problems take extra time to treat and increase the Nonproductive Time (NPT).
Baraa Kadhum Edan +1 more
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