... and analyzed the effect of poroelastic stress on the initiation of fractures (Zhou et al., 2021; Wang et al., 2021). Zhou and Ghassemi (2009) developed a finite element model that couples linear and nonlinear chemistry-pore-thermoelasticity, which can be used to analyze the wellbore stability of shale...

... ABSTRACT: Wellbore instability is one of the difficult problems restricting safe drilling. The traditional theoretical model of wellbore stability is easy to cause the actual drilling fluid density to be high and aggravate the risk of drilling lost circulation. Therefore, firstly, the rock...

... to clarify the mechanism of wellbore instability and take methods to solve the problems, the wellbore stability model was studied in well NingA. Based on lithology division, rock mechanical parameter profiles of different lithology are established, and formation pore pressure and original in-situ stress...

... of wellbore stability is carried out by using ABAQUS software. The influence of pore pressure, formation strength and drilling fluid density on wellbore stability is analyzed, which provides a powerful tool for understanding the wellbore instability mechanism of the target block of X oilfield, and effectively...

...) coupling effect and coal shrinkage induced by methane desorption that happened in the underbalanced condition. However, most previous studies ignored the influence of T-H-M coupling and coal shrinkage on wellbore stability. Therefore, a fully coupled T-H-M model with local thermal equilibrium condition...

... ABSTRACT: Rock salt, mainly comprised of NaCl, exhibits inherent softness and has a good rheology property, resulting in complex creep patterns and fracture evolution for wellbore stability. They are, even coming from underground, facing weathering and dissolution & precipitation process...

..., reduction in sweep efficiency and unintended pressure charging of shallower sand intervals. The study also provides insights to wellbore stability during drilling and sand production during life of wells. The results of the modelling are used to revisit the initial well placement, offering an enhanced...

... ABSTRACT: Studying the changes of deep mudstone strength properties after hydration are vital for the design of well drilling and proper choice of drilling fluid for deep wellbore stability. However, the previous methods (Coupled with conventional immersion test and compressive test...

... (Karatela, 2016). Li (2002) adopted two types of intersecting joints to study the influences of the 2.2. Mechanical constitutive model of DEM hydraulic parameter on wellbore stability in coal seam. The deformation model of the block adopts the composite However, traditional bedding plane models...

... distance particle drilling fluid formulation wellbore stability bentonite 0 reservoir characterization flow in porous media wellbore design fractured formation thickness coefficient effective radial stress analytical solution mudcake mpa permeability ARMA 21 1132 Effects of Water-based...

... drilling fluid wellbore integrity wellbore stability Upstream Oil & Gas Wellbore Design drilling fluids and materials stability numerical simulation thermal expansion coefficient plastic zone thermal conductivity temperature distribution coefficient heat transfer drilling...

... Reservoir Characterization bottomhole temperature hydrate decomposition bottomhole pressure drilling operation drilling fluid hydrate flow assurance wellbore stability boundary condition seepage inorganic salt transport decomposition hydrate formation equation Upstream Oil...

... ABSTRACT: Maintaining wellbore stability remains a challenging task in the oil/gas well drilling industry, especially for wells drilled through naturally fractured shale formations. Field evidences show that some wellbores that are stable immediately after drilling may collapse after several...

... instability. Compaction at the mud layer above the hydrate layer is also large due to low Young's modulus. Thus, careful consideration of the level of depressurization for wellbore stability is required. reservoir geomechanics sh sv gas hydrate deposit Reservoir Characterization Upstream Oil...

... of stratigraphic column, from compressional slowness, shear slowness, density, porosity and shale volume. Lastly, we conduct a wellbore stability and sand management analysis. Our results show the mechanical stratigraphy of unconsolidated sandstone and shale distribution in the reservoir, wellbore shear...

... Artificial Intelligence shaker event-time analysis rock failure insufficient mw lbm gal drilling efficiency drilling operation wellbore stability tight spot wellbore instability wellbore event 1. INTRODUCTION Before any drilling campaign begins, performing a comprehensive geomechanics study...

... reach wells are commonly used, particularly in the exploitation of offshore reservoirs. Owing to the large deviation angle of horizontal wells and extended reach wells, there are significant differences in the behavior of the wellbore stability compared to that of vertical wells. Wellbore stability...

... problems (Peng, 2007), causing an increase in the drilling budget by 10% (Aadnoy, 2003). Therefore, wellbore stability is considered to be one of the major stages of well planning and has been studied extensively (Bell, 2003; Bradley, 1979; Ding, 2011; Zhang et al., 2003; Zhang et al., 2009; Gentzis et al...

... low to attenuate mud losses. Method was utilized in a real case and results were then compared with the drilling data and verified the efficiency of the presented methodology. wellbore integrity Wellbore Design pore pressure wellbore stability reservoir geomechanics Engineering McLellan...

... ABSTRACT: Wellbore stability is still a primary concern in the oil/gas well drilling industry in spite of several decades of research. Wellbore instability may incur large financial losses, especially for offshore wells or ultra-deep onshore wells. Naturally fractured shale formation has been...