... in lithofacies. 6 , 7 The lithologic column consists of (1) an upper part of unconsolidated and semiconsolidated sediments (Unit A) that is mainly sands, silts, and clays, and (2) a lower part of consolidated sediments (Unit B) that is mainly sandstones and shales. 8 The hydrothermal alteration...

... 1985, Society of Petroleum Engineers experiment dimension sandstone compressibility flow rate aspect ratio thickness pore structure klinkenberg plot pore overburden pressure reservoir characterization penny-shaped crack flow in porous media upstream oil & gas surface area...

...Ioannis Chatzis; Norman R. Morrow Capillary number relationships are presented for displacement of both residual and initially continuous oil from water-wet consolidated sandstones having permeabilities that varied over about two orders of magnitude. It was found that the critical displacement...

... test apparent viscosity sandstone pore size microgel chemical flooding methods reduction The poor filterability of most xanthan gum solutions is explained by two mechanisms. Residual cellular debris or other insoluble particles coming from the fermentation process, which...

... holmgren artificial intelligence variation relative permeability saturation method ii upstream oil & gas three-phase relative permeability prediction saturation alone sandstone Stone has produced two methods 1 , 2 for estimating three-phase relative permeability from two-phase data...

... rocks has become standard practice. More recently, as a result of an increased need for better recovery techniques, massive hydraulic fracturing (MHF) has been used in low-permeability, gas-bearing sandstones in the Rocky Mountain region and in Devonian shales of the Appalachian region, where...

... as well as the nutrients required for cellular growth through reservoir formations. Nutrients such as glucose, peptone-protein, and phosphate and ammonium ions were transported through brine-saturated Berea sandstone cores in amounts sufficient to support microbial growth. Viable bacterial cells were...

... constant asperity correlation experimental data fluid dynamics prediction complex reservoir tight sand surface roughness gaussian crack model roughness sandstone flow in porous media tight gas porosity reservoir characterization upstream oil & gas penneability sampath microcrack...

... upstream oil & gas water saturation flow in porous media core laboratory inc gas permeability saturation sandstone pressure buildup low-permeability laboratory measurement irreducible water saturation coefficient permeability klinkenberg permeability core holder mass flow flow...

...Kartic C. Khilar; H. Scott Fogler Experimental and theoretical studies have been carried out to elucidate the mechanism of water sensitivity of Berea sandstone and to quantify a number of important parameters. Based on the results of a number of novel experiments, a physical model has been...

...Chih-Hang Hsieh; Henry J. Ramey, Jr. The water vapor-pressure lowering phenomenon in porous media was investigated for a range of temperatures by measuring vapor pressure vs. mass of water adsorbed in consolidated sandstone cores and unconsolidated silica sands. Experimental results showed...

... states along with pressure confinement of the samples up to 50 MPa. Observations on samples of a medium-porosity sandstone showed that the degree of multiple fracturing is quite sensitive to the condition of the borehole as well as to the loading rate and appears strongly influenced by transient pore...

... compared with the experimental data. For comparison, an analysis of Berea sandstone gas displacement also has been provided. Although the sandstone displays a minor dependence of gas recovery on water saturation, we found that the carbonate cores are strongly affected by water content. Such behavior would...

... and stagnant regions. This assumption leads to a general expression, and formulas currently used in practice are special cases of this expression. The validity of the new expression is established by the use of data corresponding to sandstones and packings and suspensions of particles. For the case of natural...

..., and fracture growth characteristics were determined as a function of stress levels. Stress contrasts of 300 to 400 psi (2 to 3 MPa) were found sufficient to restrict fracture growth in laboratory samples of Nevada tuff and Tennessee and Nugget sandstones. The required stress level was found not to depend...

...Yusuf Hekim; H. Scott Fogler; Conwell C. McCune Sandstone formations contain a variety of minerals including carbonates, clays, feldspars, quartz, and, in some cases, valuable compounds of uranium, vanadium, and copper. When a reactive fluid such as acid is injected into these porous rocks...

... ′,ft −1 − 10 −6 + 4.542×10 −11 5×10 −4 −10 −6 + 4.542×10 −11 5×10 −4 0 −10 −7 Notes: The r and s subscripts identify properties associated with the sandstone reservoir and the adjoining shale formation, respectively. Trends in r , E , and ρ with depth are approximated...

...- and water-external microemulsions, as well as surfactant solutions with lamellar structures, are examined. Untreated Bradford and Berea sandstones, oil- and water-wet treated sandstones, and filter papers are used as porous media. The study shows that the effective viscosity of the surfactant solution...

.... The effective permeability during polymer flow and the residual permeability were determined for xanthan gum and polyacrylamide solutions in Berea sandstone, Bradford sandstone, filter papers, and Nuclepore® filters. A mechanistic interpretation of the coupling of adsorption, mechanical entrapment, shear rate...

...A. D. Hill; D. M. Lindsay; I. H. Silberberg; R. S. Schechter The matrix acidization of sandstone by a hydrochloric/hydrofluoric acid mixture is described through use of a capillary model. The model was solved first in linear coordinates so that it could be compared with the results of coreflood...