..., H. 1987. Determining planes along which earthquakes occur Method and application to earthquakes accompanying hydraulic fracturing. J. Geo- phys. Res. Solid Earth and Planets 92(B9): 9407-9414. Hazzard, J.F. & Young, R.P. 2004. Numerical investigation of induced cracking and seismic velocity...

... reservoir Reservoir Characterization structural geology fracture intensity hydraulic fracturing carbonate reservoir correlation orientation fracture plane fracture intersection solution enhancement fracture enhancement transmissivity intensity bedding surface carbonate rock porosity...

... that fractures are main paths for fluid flow in rock masses, thus fracture properties such as normal stiffness, shear stiffness, aperture, friction angle, dilation angle etc, could affect the inflow and hydraulic conductivity. hydraulic fracturing modeling shear stiffness rock mass Reservoir...

... planes, are characterized by increasing roughness, segmentation, and higher deflection. hydraulic fracturing orientation grain size granitic rock Reservoir Characterization Barre granite fracture toughness Grasselli fracture characterization roughness plane granite microstructural...

... fractures. reservoir geomechanics Upstream Oil & Gas strain concentration rule Reservoir Characterization reservoir simulation asperity degradation hydraulic fracturing homogenized poromechanical behavior degradation Plesha fracture hydromechanical behavior tensor marmier...

... far for the measurement of insitu stresses at greater depths. However, certain rock types are not found to be amenable to hydraulic fracturing tests. Moreover, applying hydraulic pressure using packers some- times results in borehole collapse and jamming of the packers, which further becomes a tedious...

... conditions lying ahead of the face. Upstream Oil & Gas tunnel face Switzerland elevation displacement laboratory excavation hydraulic fracturing investigation area bedding differential elevation surface displacement imager 5003 Laser Scanner tunnel differential elevation map...

... and the physical properties of DNAPL determine the migration and distribution process (Pankow & Cherry 1995). DNAPLs enter into a fracture once it overcomes its entry pressure and then the migration is controlled by the capillary forces between water and DNAPL. hydraulic fracturing aperture Simulation...

... ABSTRACT ABSTRACT: A semi-analytical hydraulic fracture model for injection of a compressible substance (biosolids) is developed. The approach is a modification of the Perkins-Kern-Nordgren (PKN) hydraulic fracture model modified with a pseudo-dynamic leak-off function that describes...

... real time system Upstream Oil & Gas variation Reservoir Characterization damage development specimen triaxial compression rock mass reservoir geomechanics strength initiation brittle material compression flaw pressurized water hydraulic fracturing fracture process hydraulic...

... in the same direction), the jointed rock mass can be idealized as a special continuum material with a special set of material properties. hydraulic fracturing aperture Reservoir Characterization complex reservoir joint cohesion 0 reservoir geomechanics Upstream Oil & Gas Simulation...

... hydraulic fracturing Rock mechanics step-path fracture fracture failure mechanism coalescence pattern rock slope Bobet step-path failure mechanism Simulation Coalescence rock bridge propagation step-path geometry mechanism geometry final failure 1 INTRODUCTION Step-path failure mechanisms...

... (or in-plane shearing mode) and Mode III (or out-of-plane shearing mode). reservoir geomechanics strength Loading Rate experimental result Upstream Oil & Gas flagstaff sandstone short beam compression test hydraulic fracturing microcrack specimen Reservoir Characterization intensity...

... grouting (e.g. Anon 1997, Nichols & Goodings 2000), mine backfills (Gray et al. 1997), and coal seam fire control (Colaizzi 2004). drilling fluid management & disposal drilling fluids and materials injection tube enhanced recovery hydraulic fracturing grout flow production control...

... Oil & Gas fracture toughness fracture propagation Fracod Creep behaviour sub-critical crack growth hydraulic fracturing fracture mechanics fracture initiation rock mass coal sample structural geology fracture growth test result fracture 1 INTRODUCTION Time-dependency...

... ABSTRACT ABSTRACT: Closure of hydraulic fractures yields the in-situ stresses, net pressure and fracture geometry. A series of laboratory model experiments using sand samples is conducted with the aid of X-ray CT technique. The observation and analysis of CT images provide the visualized...

... conditions, including fluid interaction for two classes of problems; fluid flow through fracturing rock masses and rock blasting. The applicability of the methodology developed is illustrated through practical examples related to borehole breakout phenomena, hydraulic fracturing and the simulation of rock...

... Reservoir Characterization complex reservoir pattern distribution surface topography objective function topography data target distribution geologic modeling hydraulic fracturing pixel Simulation fracture surface topography geostatistical simulation histogram realization topography...

...). hydraulic fracturing displacement complex reservoir Simulation particle stability Upstream Oil & Gas particle assembly plane PFC model mechanical property excavation fracture system fracture metals & mining raise stability wedge ore pass system Symposium rock mass pass System...

..., Wong & Einstein 2006, Ko et al. 2006). initiation stress crack initiation stress Coalescence compression wing crack specimen geometry wing crack initiation stress open flaw hydraulic fracturing Upstream Oil & Gas initiation initiation angle flaw inclination angle wing crack...