... note on Figs. 1 and 2 that the EOR production rate started to increase again in 1996. 12 enhanced recovery project crude oil gravity upstream oil & gas viscosity oil gravity spe reservoir engineering prediction co 2 criteria oil price chemical flooding methods screening...

...P. C. Smalley; N. S. Goodwin; J. F. Dillon; C. R. Bidinger; R. J. Drozd Summary Shallow oil fields frequently contain oils that not only have low oil gravity and high viscosities, but are also highly variable in terms of these properties. It is thus crucial to gather sufficient oil-quality data...

... size, shape, boundary conditions, viscosity and viscosity ratios, interfacial tension (IFT), pore structure, wettability, capillary pressure, and relative permeability. This work addresses the application of a characteristic length to scaling the combined effects of sample shape and boundary conditions...

...G. T. Shahin; D. R. Thigpen Summary A polymer-injectivity test designed to control mobility in cosurfactant-enhanced alkaline flooding was performed in the Q sand of the White Castle field, LA. Analysis of test data indicates that a polymer bank with an average viscosity of 4 cp was propagated...

... displace the oil column vertically downward through the watered-out portions of the reservoir at 25 ft/yr. On the basis of the EFB having an 8° dip and a 4-cp in-situ oil viscosity (from historical production), we anticipated that the remaining oil saturation to waterdrive (35%) would be reduced...

... of the solvent. High oil recoveries in the 3 ϕ cases appear to be the result of condensation of solvent into the oil, resulting in (1) low oil viscosity and (2) effective displacement of oil by the second liquid phase that forms. 22 7 1992 25 5 1995 30 5 1995 1 8 1995 1 8 1995...

... reservoir pressure of 1.08. The oil viscosity is 10.6 mPa • s at a reservoir temperature of 55 °C. No significant aquifer is present, although some formation water was produced at the southeast edge of the pool during primary production. The reservoir is water-wet. Average connate-water saturation is 30...

... alkaline injection water salinity micellar slug preflush concentration injection water surfactant molecular weight spe reservoir engineering upstream oil & gas alkalis enhanced recovery oil recovery polymer efficiency cost ratio waterflooding viscosity flow in porous media fluid...

...P. J. Closmann Summary A model has been formulated for estimating the oil production during the mature phase of a steam-injection process. This model assumes that complete steam overlay has occurred and that subsequent gravity drainage of oil is accelerated because of the viscosity reduction...

...C. A. Glandt; W. G. Chapman Summary Water dissolution in crude oil becomes significant at temperatures > 150°C, and at 250°C, water solubilities in heavy crudes are ≈ 40 mol%. Dissolved water acts as a low-viscosity solvent that reduces oil-phase viscosity. This phenomenon has been considered...

... during which CO 2 was dissolved in oil. Because lowering oil viscosity is a function of the dissolved CO 2 concentration and this mechanism plays the major role in the stimulation potential, field applications were first performed in viscous-oil reservoirs with the more conventional steam huff 'n...

... of the solubility and displacement behavior of West Sak oil with CO 2 and hydrocarbon gases shows simple black-oil to complex, multiphase equilibrium behaviors. Figure 4 CO 2 -saturated-oil density. Figure 5 CO 2 -saturated-oil viscosity. 23 9 1990 8 2 1994 10 2 1994 1 5...

... injection pressure-falloff test hydraulic fracturing breakthrough reservoir description spe reservoir engineering breakthrough performance fracture orientation injection rate upstream oil & gas injectivity viscosity tor formation orientation fpp reservoir fracture engineering fracture...

... gravity, viscosity, and forces are used to advantage to improve miscible flood performance. One such design strategy is use of cyclic interruptions in the form of well flow shut-in. Field observations and laboratory experiments are presented. 24 2 1992 13 7 1993 29 7 1993 1 2 1994...

... gelation gelation gel system shear rate polymer high-flow-resistance region gel solution aggregate upstream oil & gas chromium experiment frontal velocity flow resistance permeability reduction spe reservoir engineering concentration sandpack kansas permeability viscosity artificial...

...R. M. Lansangan; J. L. Smith Summary Shear viscosity coefficients, volumetric properties, and equilibrium-phase compositions for CO 2 /West Texas oil mixtures are presented. Effects of solution gas, nitrogen in the CO 2 stream, and viscosity dependence on phase density and CO 2 concentration also...

... involved viscosity measurements and visual observations of the formulations. Two pH levels (6.5 and 8.5) were tested that represented the range of pH values found in most reservoir brines. Results indicated that pH adjustment alone did not alter the solution viscosity significantly when long-term effects...

... properties. 20 3 1991 9 4 1992 26 5 1992 1 5 1993 1 5 1993 Copyright 1993, Society of Petroleum Engineers injection pilot area upstream oil & gas corehole location oil saturation combustion viscosity drilling operation enhanced recovery core analysis dome...

... fingering injection fluid dynamics flow in porous media recovery viscosity fractional flow christie recalibration simulation In a field-scale miscible flooding project viscous fingering is likely when the mobility ratio between oil and miscible gas is adverse. The more mobile gas fingers...

... displacement relative permeability fluid dynamics reservoir engineering experiment heterogeneity characterization concentration phase behavior simulation breakthrough viscosity perturbation flood enhanced recovery permeability saturation hcpv coreflood core analysis oil produced reservoir...