... the single bearing, and the load bearing ratio of the lining is smaller. For tunnels in category III2 surrounding rock, the 0.4 m lining has little increase in maximum tensile stress compared with 0.5 m lining, the load bearing ratio is smaller, the internal force is smaller, the amount of reinforcement...

... into the rock formation nearby. casing and cementing displacement reservoir geomechanics element method experiment hydraulic fracturing casing pressure mpa hollow cylinder interface different material fracture reservoir characterization upstream oil & gas simulation tensile stress...

... & Gas shale gas well MPa cement stone cement sheath proceedings tensile stress plastic strain complex reservoir sheath cyclic loading inner cement sheath stress distribution large-scale multistage hydraulic 1. INTRODUCTION Shale gas reservoir, featured in low porosity and low...

.... The tensile stress at the tip of the pore boundary is concentrated in the vertical pores. The stress type in the middle position of the pore boundary changes from tensile to compressive. The distribution law is contrary to that of the stress distribution in the vertical pores. Through the analysis...

... such as subsidence and tilt which may indicate a change in the cavern's integrity status. Reservoir Characterization structural geology caprock stress state tensile stress natural gas storage salt dome caprock roof geometry reservoir geomechanics Upstream Oil & Gas Brine Albuquerque cavern 4...

... provide additional tensile stress along the inclined fracture surface to initiate and propagate branches. In conclusion, shear stimulation is also a dominant factor which is responsible for the multi-fractures in SC-CO 2 fracturing. complex reservoir pore pressure shear stimulation initiation...

... failure SPR cavern pressure history US government drawdown laboratory wellhead pressure history integrity Upstream Oil & Gas cavern damage factor tensile stress structural geology salt dome dilatant damage factor edge pillar dome edge sandia national laboratory 1. INTRODUCTION...

... in tension. Two obvious zones exist in the upper and lower sides where the horizontal stress is in compression, and its magnitude is about three times of the tensile stress on the wellbore. Similar phenomenon can also be found in the analysis for the vertical stress. The reservoir temperature and deformation...

... having various slenderness (length to diameter) ratio. Based on the results, it is concluded that the induced tensile stress at the centre of a diametral point load specimen as well as the point load strength index are a function of both Poisson's ratio and sample length. In general, when either...

... section tensile stress low angle section Reservoir Characterization Upstream Oil & Gas main hydraulic fracture shale fracture propagation hydraulic fracturing sesetty hydraulic fracture propagation anisotropic rock isotropic case fracture reservoir geomechanics Injection point natural...

... production monitoring natural gas storage temperature distribution gas storage cavern stress state smri spring conference cavern temperature drop operation gas storage hydraulic fracturing shaft 1 calculation Staudtmeister cavern wall rock salt mass fracture tensile stress 1. INTRODUCTION...

... in the absence of rock strength heterogeneity, there is a certain length scale of produced rock fragments dictated by the depth of maximum tensile stress from the rock face. This depth is sensitive to initial stress distribution, rock properties, and dynamics of pressure drop. The paper also presents...

... effects is quantified in terms of a dimensionless parameter. When the gas acceleration is important, the tensile stress including of effective radial stress and shear stress is examined. It is shown that the magnitude of the effective tensile stress for the accelerating Darcy-Forchheimer flow is higher...

... modelling and high-speed photography of the fracture process, the rupture mechanism was further confirmed to be the result of an indirect tensile stress induced inside the specimens. Based on the results, it is concluded that truncated Brazilian specimens can conveniently be adopted to determine the tensile...

... initiation superposition tensile stress apex crack initiation mechanics Timoshenko tensile strength Upstream Oil & Gas Brazilian test international journal specimen Brazilian disc More than seventy years ago, Brazilian scholar Carneiro FLLB first proposed a protocol for measuring...

... solution as the asymptotic far-field boundary condition could in fact effectively account for the fact that the domain is semi-infinite. shear plastic strain Simulation color bar Upstream Oil & Gas hertzian solution boundary condition displacement confinement tensile stress hertzian...

... at the injector wells due to tensile stresses, a direct consequence of cold water injection. Results also show how the deformation increases when the reservoir formation temperature is further lowered as more cold water is being injected. Using the coupled simulations, North Sea Operators can now understand...

... experiments on over 50 materials, the relationship between the lifetime of a specimen under uniaxial load, t f , and the induced tensile stress, s , can be determined by an Arrhenius-type law: (equation) where k and T are Boltzmann's constant and absolute temperature, respectively...

... Abstract: In this study three series of indirect tensile tests, the Brazilian test, the flattened Brazilian (FB) test and the ring test, were performed in order to determine the indirect maximum tensile stress of Dionysos marble. A number of circular disc specimens ( D = 54 mm) was prepared...

... Abstract The objective of this study was to evaluate the effect of thermal conductivities and Young's moduli of damaged materials (high-porosity material with the lowest absorption of X-rays in computed tomography images) on tensile stresses and tensile damage evolution during heating...