... 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...

...Methodology Cuttings Description and Analysis Cuttings Classifications by Grain Size, Shape and Sorting Abstract Tight and complex carbonate reservoirs development requires placing horizontal lateral wells to maximize the reservoir contact across the zones with the best flow potential...

... 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...

... The grain size can be estimated by utilizing NMR T 2 spectrum based on pore scale modeling ( Chen et al. 2007 ). With known of geologic and mineralogical information, depositional environment analysis ( Gaafar et al 2014 ) and expandable sand screen design ( Conroy et al 2010 ) were performed...

... Abstract Grain size and bed thickness are important geological attributes for sedimentary facies analysis and reservoir quality ranking in deepwater turbidite reservoirs. Grain size controls reservoir quality and has causative or correlational effects on most well logs. Additionally, bed...

..., 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...

... 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 experiments were conducted using these core...

.... Lasergrain size analysis was performed to determine the median formation grain size. The selection criteria for proppants at Medusa called for the proppant size to range between 8 and 10 times the median formation particle size measured from the sidewall cores. Some formations were far from homogeneous...

... 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 of permeability and internal reservoir heterogeneity are developed based on detailed integration of core...

... stress dependent permeability simulation stress-dependent permeability grain size Introduction Abstract During the production lifecycle of a reservoir, absolute permeability at any given location may change in response to an increase in the net effective stress and a concomitant decrease...

... the uniaxial compressive strength of the rock. P. 381^ well logging porosity strength evaluation rock mech society of petroleum engineers reservoir characterization critical value uniaxial compressive strength sand production evaluation grain size laboratory upstream oil & gas plug...

... well logging clay content travis peak formation reservoir geomechanics texture spe 24758 grain size upstream oil & gas thin section structural geology sandstone compressive spe 24758 composition strength strength variation log analysis porosity rock strength average number...

... Abstract Fluvial deposits contain a high percentage of large-scale cross-bedding. The contrasting grain size of adjacent foreset laminae combined with poorly-sorted bottomsets cause a considerable permeability heterogeneity. Permeability measurements of studied outcrop sandstones Permeability...

... in mineralogy, grain size and other petrographic characteristics. petrographic characteristics. Sedimentary rocks exhibit layering from the kilometer scale down to the grain size. Petroleum engineers have often indicated the importance of small-scale stratification on the permeability, hence producibility...

.... P. 119 mudstone illite montmorillonite sandstone reservoir property lithology reservoir characterization structural geology porosity grain size siltstone permeability petrophysical property capillary pressure paludal zone saturation depositional environment strength upstream...

... included: mineralogy, properties considered included: mineralogy, unconfined compressive strength, average grain size, sonic velocity, in-situ compressive strength, Young's modulus, porosity, etc. An empirical equation of bit ROP as a function of bit weight, well depth and these basic rock properties...

... 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 breakthrough enhanced recovery Camp Sand Unit miscible flood Haynesville Field water injection Camp Sand porosity enriched gas permeability displacement grain size reservoir study reservoir Efficiency slug injection 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...