... upstream oil & gas cohesion wellbore stability modeling wellbore drilling operation borehole stability modeling wellbore integrity strength reduction borehole stability assessment concentration wellbore stability modeling relationship reservoir criteria wellbore design nyza...

... orientations were simulated using the theoretical model, based on 3D elastic stress analysis and non-local rock fracture criterion. Second, performance of each weak point was tested in a series of large-scale true-triaxial hydraulic fracturing experiments on cement blocks, where boreholes and weak points were...

... be measured directly and must be indirectly estimated. In this paper, a new semi-analytical poroelastic solution is developed for stress and pore pressure distributions surrounding a borehole with a known breakout geometry. The entire geometry of the stabilized borehole breakout, not just breakout width...

... calculation shows how an incomplete or poorly interpreted dataset may be misleading, thereby highlighting the inherent uncertainties and difficulties associated with borehole stability modelling. wellbore integrity mohr-coulomb orientation borehole wellbore design criteria plane prediction...

... of geological characteristics can lead to higher efficiency of tunnelling projects and prevent any cost or time overruns. In this paper, a random forest (RF) approach is utilized to model underground lithology using 65 boreholes along a tunnel project. In order to acquire best hyper parameters for the RF model...

... Abstract Effective geomechanical analysis requires a thorough understanding of the complexities of the formations drilled, such as stress-induced anisotropy, intrinsic anisotropy, azimuthal heterogeneity, drilling induced and natural fractures, and/or borehole damage. The identification...

... anisotropy effects. The velocity of borehole modes is affected by stresses in the medium due to the acoustoelastic effect,t and the anisotropy of prestressed elastic medium is used for estimation of the subsurface stress field (Donald and Prioul, 2015). The fractures in the medium alter the stress...

... the obtained experimental data. These explicit FIP formulas provide useful estimations that can be applied in well stimulation design. wellbore integrity wellbore design criterion hydraulic fracturing upstream oil & gas formula initiation borehole drilling operation fracture initiation...

... to the common symmetric breakouts. While the stability of these structures needs to be assessed, borehole breakouts may also provide useful information regarding the stress field in terms of direction and magnitude if the failure mode is well understood. Understanding and predicting failure patterns observed...

... and limitations of this measurement, an efficient numerical procedure is required. Such modeling involves solving both the static mechanical problem to determine the prestressed state of the formation and finding the characteristics of elastic wave propagation in the borehole, for example, flexural waves. Direct...

... Saudi Aramco: Public 1. BACKGROUND In-situ rock testing in oil and gas wells requires an in- depth analysis of borehole mechanical responses in order to obtain representative measurements of the rock formation. During the drilling process, it is crucially important to minimize wellbore instability...