...% in the thermally mature (>1.4% Ro) shales and from 0.25 to 0.75 wt% in the siltstones. Measured porosities in both the shales and siltstones are typically 4.5 to 7.5% with low matrix permeabilities ranging from about 80 to 700 nanodarcies. Lying between the sandstones of the Frontier and Blair, the Baxter...

... Abstract A parallel geomechanics model for describing naturally fractured rock deformation is developed and tightly coupled with a dual porosity/dual permeability black oil model. The geomechanics model is developed with capabilities of modeling both rock matrix and the fracture deformations...

... hydraulic fracturing run time simulator three forks Bakken well permeability case 2 porosity cumulative oil production base case Bakken lineament matrix fracture flow simulation middle Bakken hydraulic fracture flow-simulation model Introduction Methods for horizontal well...

... and pores to identify the effect of micro-scale properties on flow behavior. Porosity and permeability of several core samples from the Middle Bakken, Lower Eagle Ford, and Niobrara formations were studied and the results, using mercury injection capillary pressure (MICP), X-Ray diffraction (XRD...

... Abstract Quantification of secondary mineralization or cementation within natural fractures has not been considered in previous petrophysical dual porosity models. This is however of paramount importance as morphology of the fractures indicates that they can be open, partially or completely...

... Abstract Heterogeneous rocks with broad pore size distributions, such as carbonates and clay-rich sandstones, often display widely varying behavior. The interaction of micro- and macro-porosity in these complex rocks makes them difficult both to understand and to characterize. Pore scale...

... through the core sample, homogeneity of the core sample at the initial condition, pressure-independent viscosity, Klinkenberg-like inverse pressure dependence of apparent permeability, non-negligible pore-pressure independent porevolume compressibility, pressure-dependent effective porosity, negligible...

... Abstract Although stress-dependent porosity and permeability have been applied to majority of models to calculate effective porosity and permeability, effect of adsorbed gas specified as pore volume occupied by adsorbate is not properly accounted. However, nanoscale porosity and permeability...

... Summary Permeability and porosity decrease with increasing net stress in consolidated and unconsolidated porous media is a well-known phenomenon to petroleum and geomechanics engineers. Conversely, permeability and porosity are observed to increase when net stress decreases, however typically...

... experiments in five clean Middle Bakken cores having different initial fluid saturations to determine (1) where the fluids reside within the pores, and (2) the effect of aging on wettability change. The experimental protocol included measuring porosity and permeability of five clean Middle Bakken cores. We...

... was validated through bootstrapping and cross-validation. The well log interpretations that were considered for lithofacies classification and permeability modelling are neutron porosity, shale volume, and water saturation as a function of depth. The measured discrete lithofacies types include three main...

... of petroleum engineers flow in porous media Upstream Oil & Gas potential application application Bakken formation Reservoir Characterization structural geology mineral composition Williston Basin AFM shale gas Fluid Dynamics porosity permeability nano-pore structure contact mode cantilever...

... characteristics provides the starting point for completion-and hydraulic-fracture stimulation design: Identification of free-gas zones Identification of rock types and mineralogy Total organic content Quantification of effective shale porosity Estimates of shale permeability Mechanical stress...

... maturation. We introduce a modified porosity term and find that (i) there is a significant correlation between velocity and modified porosity of all ORS; (ii) Imaging and quantifying microscale impedance texture and contrast in the images allows us to correlate them with ultrasonic measurements on a cm-scale...

.... This process might result in rock movements such as compaction, improvement of natural fractures, induced fracturing, and fault activation, which continuously modify the reservoir properties such as the porosities, the permeabilities and the fault transmissibilities. Modifications of such parameters strongly...

... wetting phase saturation). We tested our model using more than 100 sets of mercury-injection capillary pressure data. Effective porosity in our data set ranges from 4 to 14 percent, while absolute permeability ranges from 0.005 to 0.5 md. The primary technical contribution of this paper is a tuned model...

... of porosity characteristic of tight gas sandstones are obtained. The only mode of cementation considered here is overgrowth or rim cement, which was added to each grain in our compacted sediment as an "onion skin". This idealization of the actual crystallographic features of quartz cement is adequate...

... porosity and air permeability yields a good correlation coefficient, the formation has to be studied within units due to differences in pore-throat sizes and reservoir process speed. Linear regression and multiple regression analyses are used for the study of each unit. The results are performed using...

... At irreducible saturation the wetting phase also occupies (fills completely) small pores isolated during drainage 7 . We briefly consider the influence of this second morphology in low porosity sandstones below. The main result is that small changes in wetting phase saturation...

... causes the bulk and shear modulus to increase. Rock compaction also reduces the porosity, in effect increasing the density and reducing the sonic travel time. Further compaction is resisted by either stiffness in the rock frame or by increases in the pore pressure. Sonic, density and resistivity logs...