... hydraulic fracturing Daneshy fluid pressure Reservoir Characterization pressure data pressure drop reservoir geomechanics Upstream Oil & Gas variation plane stress measurement principal stress Magnitude determination fracture perpendicular fracture length fracture plane...

... mixed layer illite-smectite, quartz and kaolinite. These depth and hence temperature variations indicate that compaction and diagenesis are likely to affect both physical and mechanical properties of this top seal. While mechanical compaction reduces pore throat size [3] and strengthens the rock...

... to components used to estimate shale pore pressure. Two sources of variation dominate the uncertainty in estimating pore pressure from resistivity: trust that sand pressure calibration points are representative of shale pressures, and choice of the normal compaction trend. Upstream Oil...

.... Artificial Intelligence US government metals & mining Upstream Oil & Gas Discontinuity orientation discontinuity photography Engineering accuracy prediction variation ROCK mass CHARACTERIZATION stability rock mass image understanding orientation variability modeling program point...

...]. Some previous works were already devoted to the characterization of the volumetric behaviour of weak or more consolidated sandstones and to the effects of stress variations upon permeability and compressibility [18-20]. The purpose of this work was to evaluate at the laboratory scale the influence...

... Reservoir Characterization Upstream Oil & Gas hydraulic conductivity reservoir geomechanics pore pressure optimization pressure distribution pore pressure distribution fracture Artificial Intelligence injection well hydraulic fracturing variation pore-pressure distribution...

... depicted in Figures la, Ib and lc, i.e. before destressing, after destressing, and after face advance, respectively. 338 400 300 '" 200 co 'if< e:. ~ " ] .~ " l 0 0. " '" 100 0 500 1000 1500 2000 2500 3000 Depth below surface (m) Figure 4 Burst Potential Index (BPI) variation with depth 400 cu=eo" H = 500...

... 6a to 6c show the variation of the maxi- mum induced stress around the excavation compared with the results obtained with the values given in Table 2·. As can be seen on the~e Figures, the varia- tion of the maximum induced stress on the opening boundary ranges from 8% (for changes in the residual...

...,~ to loading conditions. The reslllts indicate that there exists a strong coupling between the stress changes and permeability variations. 1 INTRODUCTION Fluid flow through a single fracture is commonly modeled using the concept of parallel plate ana- logue in which the variation of volumetric flowrate...

... &amp; formal reasoning Artificial Intelligence drilling fluids and materials Upstream Oil &amp; Gas variation drilling fluid formulation roughness rectangular fracture fracture plane production monitoring production logging logic programming transmissivity elemental area rock fracture analytical...

... to the gate structure to dissipate energy due to dynamic loads was aJso investigated, MateriaJs used were river gravel and crushed rock. The static results· were compared to classicaJ bin-load the- ory. Some variation from classical bin-load theory was observed and suggests that some modifications...

..., possibly related to variations in fault behavior and changes of fundamental reservoir parameters, like saturation levels, relative permeabilities and level of oil/gas-water contact. The risk that these variations could affect the sealing properties of a fault needs to be evaluated in order to avoid losses...

... lead to change in fracture aperture, variation in formation permeability. For problems in mining engineering, the stress field is perturbed and subsequent redistributed after mining. The fracture aperture changes due to the stress changes control the permeability and water flow into the mined area...

... discontinuities are NW-SE trend with steep dip. Anisotropy are related to the variation of values in some geomechanical properties in the marble body as well as in the schistose rocks depending of the dip angle between planar structures and the value of such geomechanical properties measured in the laboratory...

... R A , CMtenay-Malabry, France ABSTRACT: This paper presents numerical modelings of dessaturation around an underground cavity sub- mitted to moisture variations. Variations of moisture in underground works put at stake hydro-mechanical coupling effects in the rock mass demonstrated by the appearance...

... by the coefficient of variation (COV) and the scale of fluctuation. Only the COV is discussed herein. The COV. of inherent variability for various test measurements is given in histograms to illustrate its population distribution. The means and standard deviations of the COV are shown with the total number of data...

... here to consider the effect of variations in joint-set orientation. Two models of tunneling cases are considered. The first case suggests that variations in joint-set orientation about a representative value makes only a small absolute difference in the probability of large keyblock formation...

... for the variation of density and yield stress with depth. The yield stress is supposed to be a function of the current density. Although the density could be considered to be linearly dependent on depth, it is shown that a linear variation of the yield stress with depth is physically unacceptable. A procedure...

... and porosity are suggested as significant guides for the judgement of durability of building stones. Contents of A1 2 0 3 and FeO in the granitic rocks can be used to estimate the readiness to chemical weathering and deterioration. strength Parker porosity building stone durability variation...

... in support performance with variation in simple parameters such as support spacing, and support force or resistance; the use of load spreaders has also been investigated. Results are presented for one of the parameter studies, carried out under the quasi-static onditions of a normal mining procedure...