... strength. Grain crushing induced by the uniaxial strain stress path results in a pronounced reduction of porosity and permeability, which manifests more readily for samples with large grain size. The change of particle size distribution indicates that the high effective stress causes grain crushing...

... measurements flow in porous media structural geology moderately carbonate reservoir Fluid Dynamics Reservoir Characterization complex reservoir Upstream Oil & Gas variation grain size formation evaluation tight carbonate reservoir facies enhance characterization examination society...

...Introduction The understanding of the energy distribution is of critical importance for depositional environment interpretation. Grain-size distribution is a good indicator of sediment transport. Visher (1969 ) proposed probability cumulative frequency plots of grain-size distribution...

... The log analysts face significant challenges in deriving porosity, permeability and water saturation from open-hole log analysis owing to the highly variable mineralogy and grain size in these formations ( Mitchell 2011 ). Many models available for permeability calculations are based on porosity...

... Grain size is typically measured from core samples or outcrops with a laser particle size analyzer (LPSA). To date, there exists no effective physical measurement capable of measuring grain size directly at downhole conditions. However, there are some causative and correlational effects between...

..., and grain size from selected formation samples. An analytical, log-based grain size analysis was introduced to link a Rosin-Rammler formula to formation properties. A limit-based analysis links formation strength or sanding potential to operating conditions including production rate, influx, drawdown...

... of this paramagnetic material and its effect on surface relaxation is the essence of this study. There were two series of synthetic core samples created, one with a varying paramagnetic concentration and constant grain size and the other with a varying grain size and constant paramagnetic concentration. NMR...

... the information gathered during the drilling phase was applied to the completion design to ensure long-lasting, reliable and profitable wells. engineer proppant presentation reservoir grain size hydraulic fracturing wellbore completion drilling phase medusa packer information cabr 2 completion...

... permeability in a NE-SW direction (down depositional dip). Permeability and porosity are only weakly related to grain size. Sorting (standard deviation of grain size) and skewness (asymmetry of the grain size distribution) are the fundamental controls on porosity and permeability. Rock-based log models...

... characterization fluid dynamics simulation stress-dependent permeability permeability porosity initial permeability dependent permeability stress dependent permeability grain size complex reservoir reservoir simulation dependency rock type 2 formation type adjusted permeability retained diameter...

... strength indicator sand production evaluation society of petroleum engineers grain size laboratory mechanical damage log analysis compaction factor sandstone reservoir geomechanics compressive strength Introduction The general frame of this study is the production of oil and gas from...

... 24758 clay content travis peak formation reservoir geomechanics average number texture grain size upstream oil & gas thin section structural geology sandstone compressive spe 24758 composition strength compressive strength classification reservoir characterization strength variation...

...). DISCUSSION Fluvial channel sandbodies of similar architecture to the studied outcrop and subsurface deposits, are assumed to be built up of 70-80% of fine-medium, trough cross-bedded sands. The sets consist for 80-90% of foreset avalanche deposits. Water energy fluctuations and the grain sizes...

... during lateral acceration or vertical aggradation, producing vertical variations in mineralogy, grain size and other petrographic characteristics. lamination porosity rock sample variation lamina 2 fluid dynamics quartz grain size bedding plane permeability anisotropy mesaverde 255...

... geology porosity grain size siltstone permeability capillary pressure paludal zone saturation depositional environment strength upstream oil & gas fragment petrophysical property lithology reservoir characterization reservoir gamma ray porosity complex reservoir united states...

... upstream oil & gas torrey buff sandstone drilling fluid formulation compressive strength rock type envelope penetration rate response drilling fluids and materials well depth grain size indentation peak force reservoir characterization regression equation reservoir geomechanics drilling...

... deposited pods of poorly sorted very fine-grained, silty, argillaceous sandstone. Mean grain size in Type I reservoirs varies between 0.08 and 0.14 mm. Porosity averages 12.2 percent and permeability Porosity averages 12.2 percent and permeability averages 1.20 md. Illite or mixed layer illite...

.... Upstream Oil & Gas Efficiency displacement grain size slug breakthrough miscible flood Haynesville Field injection reservoir study reservoir water injection enhanced recovery Camp Sand Unit porosity enriched gas Camp Sand permeability lithology SPE 7553 RESERVOIR STUDY OF THE CAMP...

... to grain size, sedimentary structures, and also to low-derived hydrocarbon filled pore volume, phi (1 - Sw). Permeabilities in uncored wells then could be estimated by means of their relationship to phi (1 - Sw). These permeability trends were mapped and used to select optimum locations for injection wells...

... Abstract Our objective is to deductively and semi-quantitatively explore the joint effects of grain size and flow on cementation rates and thus on the permeability of sandstones. For example, is it safe for a reservoir geologist to assume that a map of grain size is a good predictor...