... to avoid the development of damage zones around the wellbores. upstream oil & gas wellbore integrity concentration regime asia government reservoir characterization criterion wellbore reservoir geomechanics borehole plastic volumetric strain wellbore stability thermo-elastoplastic...

... type dispersion test shale formation wellbore stability clastic rock mudstone water molecule geology shale sample water-based drilling fluid Introduction One key challenge in the oil and gas drilling operations is wellbore stability when drilling clay-rich formations using water-based...

... on wellbore stability. We show that drilling mud with a lower temperature than the rock formation results in differential contraction of the solid and pore fluid constituents and leads to significant alteration of pore pressure and stress distributions. Additionally, a low-permeability and thin mud cake can...

... drilling plan that is based on fundamental science to drill through the problematic shale oil formation safely and effectively. The well design process began by firstly developing the geo-mechanical model of the field, particularly the in-situ stress model, which is critical for accurate wellbore stability...

... Abstract A software product, called SAGE-WSA, has been developed to provide an integrative platform for experimenting impacts of various affecting factors and mechanisms on the drilling mud design and wellbore stability. The software packages analytical solutions of stresses, pore pressure...

... to physical and chemical interactions between rocks and drilling fluid and mostly neglect the impact of drill string vibrations on wellbore stability. However, such vibrations can cause significant damage to the formation, which then degrades the formation's mechanical integrity and compound wellbore...

... geomechanics wellbore stability variation principle stress image log interpretation algorithm mechanical earth model parameter determination maximum horizontal stress in-situ stress geomechanics Introduction A mechanical earth model (MEM) is a crucial component of well design processes; chief...

...-dimensional stability model. For the benefit of all drilling engineers and operators in Oman, various charts are produced using the stability model. Wellbore stability study is generally a difficult task that may need for a highly specialist consultation and is a time-consuming procedure. An important...

... technologies that helped to improve wellbore quality and allowed corrections in Real Time. wellbore integrity upstream oil & gas diameter real time system wellbore design lateral section pioneering integrative solution drilling operation hole cleaning directional drilling wellbore stability...

... is a common form of wellbore instability especially in tectonic stress regime. For a particular well trajectory, wellbore stability is generally considered a result of an interplay between drilling mud density (i.e., mud weight) and subsurface geomechanical parameters including in-situ earth stresses...

... oil & gas wellbore stability drill string vibration cyclic load stress distribution wellbore surface Introduction Abstract Wellbore instability is one of the most important causes of Non-Productive Time causing billions of dollars of losses every year in the petroleum industry...

...-linear plastic yielding criteria and gas flow in porous media are also emphasized. Reservoir Characterization flow in porous media wellbore stability reservoir geomechanics Wellbore Design strength elastoplastic model prediction saturation deformation flow assurance Upstream Oil...

... assumed that wellbore instability problems were due to physical and chemical interactions between rocks and drilling fluid; and neglected impact of drillstring vibration on wellbore stability. Drillstring vibration is usually mitigated while drilling not for wellbore stability issues; but to prevent...

... Drilling and stimulation related challenges are frequently encountered in carbonate reservoirs and wellbore stability issues such as wellbore collapse and lost circulations are the most common and problematic events experienced while conducting drilling operations and hydraulic fracturing...

... for unconventional reservoirs. This customized system is specially formulated to drill long sections in unconventional reservoirs with the required wellbore stability across sensitive zones, and compatible in delivering high-resolution imaging tools, lubricous to reduce friction coefficient along extended lateral...

... through troublesome reactive formations that showed serious wellbore stability issues and stuck pipe incidents. The customized drilling and completions fluids system was designed for different intervals, taking the following objectives in consideration: Improved hole stability through stressed...

... Abstract Development of existing mature fields can pose a wide variety of specific challenges originiating from earlier programs and extended production operations. Wellbore stability parameters can change as fields mature and wells age requiring suitable combinations of innovative techniques...

... in the problematic Kolosh formation in Kurdistan has always been associated with several wellbore stability problems (e.g., hole washout, stuck pipe, extra cuttings/cavings, tight holes). This has caused large amounts of non-productive time to drilling programs and the drilling of sidetracks in some of the wells...

... for wellbore stability predictions. A comprehensive geomechanical study of the unconsolidated sandstone reservoir was conducted by incorporating data from six vertical offset wells in order to constrain the contemporary state of stress and rock strength profiles as a function of depth. The aim of the study...

..., the application of underbalanced drilling (UBD) should be evaluated thoroughly through the use of in-situ stresses and rock mechanical properties to estimate under what hydraulic drilling conditions the wellbore is stable. This paper presents a mechanical wellbore stability analysis for two depleted Iranian...