... attitude trajectory stabilization tool string well trajectory upstream oil & gas axis directional drilling horizontal section geological subdiscipline maximum principal stress horizontal well section borehole trajectory deviation rate application average maximum principal stress ARMA...

... distribution coefficient wellbore pressure sequence wellbore instability failure area stress field reservoir geomechanics borehole static model failure response maximum principal stress flow in porous media geological subdiscipline equation pore pressure shear failure zone distribution...

... rock mass displacement stability hoek-brown strength criterion wang rebound displacement roof rock mass maximum principal stress flac3d ARMA 23 0228 Geomechanics analysis of the phosphate ore mining using the Hoek-Brown model Suifeng Wang, Tao Wang, Bowen Fan and Suoao Hu State Key...

... distribution, were considered in the numerical investigations. The numerical results showed that: 1) the horizontal maximum principal stress was larger than the vertical stress with a main direction along the northeast in the study area; 2) cracks were relatively developed near the faults, and the direction...

... 0.30 5 0.1 4.4 Boundary conditions The research results showed that the maximum principal stress was in the vertical direction in Ordovician strata in the Tuofutai block, and the horizontal maximum and minimum principal stresses are distributed in the horizontal direction. Due to the distribution...

... load, and the decrease of in-situ stress difference hinders the propagation of the fracture; the effects of frequency and elastic modulus on the maximum tensile stress are similar, and both have an optimal value; the smaller the angle between the fracture and the horizontal maximum principal stress...

... pressure, temperature and cavity size will significantly increase the induced maximum principal stress. reservoir geomechanics strength pressurization different internal pressure metals & mining cavity size cavity roof MPa cavity radius internal pressure Upstream Oil & Gas maximum...

... as the maximum shear stresses are analyzed around the flaw tips and along the bridge between the inner flaw tips of the pressurized and non-pressurized flaws. When the specimen is loaded uniaxially, the maximum principal stresses in the bridge between inner flaw tips are tensile near the pressurized flaw...

... of the maximum principal stress to minimum principal stress have been identified as the top three parameters affecting slotting performance. metals & mining coal seam gas flow in porous media coal bed methane complex reservoir Upstream Oil & Gas maximum principal stress orientation...

... normal stress criterion also known as Coulomb s criterion is based on the Maximum normal stress theory. According to this theory failure occurs when the maximum principal stress reaches the ultimate strength of the material for simple tension. Based on this theory, the largest principal stress...

... tendency repulsio tendency repulsion interaction simulation maximum tip upstream oil & gas regularity rig tendency fracture stress half -length maximum principal stress attraction hydraulic fracture fracture hydraulic fracturing propagation newborn fracture node 1. INTRODUCTION...

... the numerical method. The research is focused on the effect of critical parameters associated with the hydraulic fracturing on the largest principal stress and differential principal stresses in the rock. According to Coulomb’s criterion, failure occurs when the maximum principal stress reaches the ultimate...

... stress), vacuum (negative pressure), depth and method of extraction on the induced maximum principal stress. It was concluded that increasing internal pressure, cavity length, and depth of cover will significantly increase the induced maximum principal stress around the cavity. Applying negative pressure...

... profile equation 1 assumption elastic property theoretical prediction lateral strain prediction mechanical property stress variation finite element analysis stress ratio Upstream Oil & Gas variation subsurface layer maximum principal stress Poisson principal stress minimum principal...

... at the tip of the pick in cutting and normal directions. Fig. 7. Geometry and FE meshing of the conical pick assembly composed of pick, weld and shank. Because of the brittle nature of the material used for pick and weld, the critical stress is the maximum principal stress causing tensile breakage...

... the fault has lost its original load because of displacement above the fault; this results in considerably less maximum horizontal stress magnitude than the magnitudes below the fracture zone, where the maximum horizontal stress magnitude is fairly constant [1]. orientation maximum principal stress...

... coefficient concentration coefficient reservoir geomechanics criterion stress state rock mass Reservoir Characterization strength underground excavation rock mass strength engineering area Hoek friction coefficient mass strength maximum principal stress uniaxial compressive strength equation...

... structural geology support scheme elasto-plastic damage fem Upstream Oil & Gas maximum principal stress stability reservoir geomechanics cavern key point excavation numerical model Reservoir Characterization scheme ii rock mass optimum support elasto-plastic damage model...

... of the wellbore before the fracture turns in the direction according to the orientation of maximum principal stress prevailing in the reservoir. 2. LEAK-OFF TESTS AND EXTENDED LEAK-OFF TESTS Leak-off tests are performed immediately beneath cemented casing in order to test the integrity of the set cement...

... Reservoir Characterization Nesson Anticline North Dakota Upstream Oil & Gas horizontal stress fracture Sequestration petroleum production reservoir geomechanics co 2 maximum principal stress study area geomechanical stability assessment anticline Williston Basin Craton...