... popular approach to estimate the tensile strength across a wide range of materials (Hobbs, 1964, Barla and Innaurato, 1973, Jonsén et al., 2007, Bahaaddini et al., 2019). Valid testing results are obtained by inducing a tensile fracture at the center, splitting the sample along the compressive diameter...

... ABSTRACT: We simulated the tensile fracturing process, capturing both microseismic events (acoustic emissions) and the dynamics of fracture propagation through high-speed photography. To record the millisecond-level fracture propagation, a synchronization circuit was employed, designed...

... wellbore integrity wellbore stability clastic rock rock type geological subdiscipline mogi-coulomb criterion breakdown operation plane drilling leakage mpa criteria tensile fracture shear breakdown breakout journal ARMA 24 0105 Development and Validation of a New Wellbore Stability...

... unsupervised machine proportion reservoir geomechanics geological subdiscipline fracture weak plane rock failure process tensile fracture elastic stage waveform peak strength mechanism engineering clastic rock rock type reservoir characterization strength cluster increase rock sample crack...

... and orientation to material parameters and delta temperature (i.e., amount of cooling required to initiate a tensile fracture). Probability and sensitivity studies were conducted to analyze the impact of inherent variability in geologic materials on the predicted magnitudes of S Hmax , S hmin , and Θ (i.e...

... tensile fracture reservoir characterization upstream oil & gas acoustic emission complex reservoir dimension branch index fracture network american rock mechanics association permeability fracturing effect experiment ae event characteristic fracture evaluation connection model shale...

... of hot dry rock is used to study the deformation and failure mechanism of the supporting body of unpropped fractures under high temperature and high pressure. On this basis, the mechanism of constructing the conductivity of hot dry rock tensile fractures and shear-slip fractures is discussed...

..., 2013; He and Xu, 2015). For these limitations, we opt to use scratch testing to obtain materials' fracture properties in our study. hydraulic fracturing scratch test energy density contact bearing area reservoir characterization tensile fracture fracture toughness tangential force...

... of in-situ stresses should include both the magnitude and direction of all the principal stress components. An accurate estimation of the in-situ stress field is a prerequisite for a robust and reliable geomechanical analysis. reservoir geomechanics tensile fracture fluid pressure Reservoir...

..., but the fracture network, rather than the connectivity of the pores, provides the conduits for fluids and heat to flow through the reservoir. Injecting fluid alters the stress field in the area. If the induced extra pressure is larger than the rock strength, it propagates tensile fractures in the rock, enhancing...

... Abstract This study investigates the impacts of rock anisotropy (mainly transverse isotropy, TI) on the near-wellbore stress distribution and the consequential creation of drilling induced tensile fractures (DITF). First, by utilizing an earlier analytical solution, a theoretical model has...

... mechanism analysis supports the interpretation of reactivated existing fractures rather than the formation of hydraulically-induced tensile fractures. 1. INTRODUCTION The development of linear trends of microseismicity during hydraulic fracture stimulation treatments has been typically interpreted...

... ABSTRACT In this work, the effect of gouge materials on the non-linearity of the closure curve during shear was investigated in the direct shear tests by using mortar fracture replicas of sizes ranging from 100 mm to 200 mm, which were reproduced from a tensile fracture created in granite...

... ABSTRACT: Recent borehole imaging logs of the Barnett Shale reveal intriguing closely-spaced transverse fractures perpendicular to the wellbore, most often along side with the two common longitudinal drilling-induced tensile fractures. In this study, an analytical wellbore stability model...

... ABSTRACT: We developed an experimental system that can be used to conduct a shear-flow test under a constant normal stress using a flat-jack-type true triaxial compressive test apparatus. A shear flow test was carried out on a cubic specimen with a single tensile fracture...

... time was significantly reduced (133 days compared to previous 339 days). The well is now producing gas at 10.3×104 m3/d. The study demonstrates the robustness of stress state and rock strength determination based on modeling the co-occurrence of breakouts and drilling induced tensile fractures...

... tensile fracture initiation Completion Installation and Operations displacement Upstream Oil & Gas hydraulic fracturing tensile stress fracture crack initiation Geomech indentation test indentation pressure Wedge Indentation ESPI fringe indentation Rock Mech experiment...

... tensile fractures for seven rock types. Damage zones are evident on all of the sheared surfaces. There is evidence of both crushing and breaking of surface asperities. Damage is relatively sparse, and the location of the damaged zones is strongly related to geometrical features. However, the relationships...

...) and tensile fractures (in tensile regions) adjacent to the excavation. The microproperties of the PFC2D material were chosen to match the elastic modulus, crack-initiation stress and unconfined compressive strength, as well as the anisotropy in modulus and strength of gneissic tonalite. No attempt was made...

... (GIIc/GIc) and stress ratio (ó3/ó1) affect the propagation mode of a single fracture. fracture growth tensile fracture surface dislocation propagate Coalescence fracture propagation hydraulic fracturing propagation fracture toughness experiment fracture tip fracture coalescence...