..., the sandpack was saturated with reservoir oil at room temperature and high pressures to trap CO 2 in the liquid state (1,500 to 2,000 psi [10 342 to 13 790 kPa]). Two PV's of oil usually were required to ensure that no residual CO 2 was left in the system. Then the sandpack was equilibrated overnight...

... cores with water and a refined white mineral oil. Experiments were run on 2-in. [5.1-cm] -diameter, 20-in. [52.-cm] -long cores from room temperature to 300°F [149°C]. Unlike previous researchers, we observed essentially no changes with temperature in either residual saturations or relative permeability...

... saturations. The saturation value at the discontinuity, S d , can be found with the standard Welge 11 solution, with the exception that the tangent line is drawn from zero water saturation rather than the critical water saturation. Equivalently, S d can be found as the solution to (5) f w...

... under certain conditions. Consequently, a distribution of saturations will evolve again to separate the two regions where only one fluid is flowing. However, the length and shape of this transition region will differ markedly from that which results from a distribution of pore sizes. 14 Moreover...

...] at 129.2°F [54°C]. At a bulk density of the combustion-tube pack of 104.26 lbm/cu ft [1.67 g/cm 3 ], the minimum crude-oil content to support an adiabatic combustion process was estimated to be 7.1 wt%. This translates into 34.4% oil saturation for the sandpack of 37% porosity and the crude-oil gravity...

... oil much more efficiently in both first-contact and multiple-contact miscible displacements when water was absent. In tertiary displacements of a refined oil, CO 2 effectively displaced the oil it contacted, but high water saturations restricted access of CO 2 to the oil. The low viscosity of CO 2...

...M. F. N. Mohsen In the analytical solution of the Buckley-Leverett problem, Welge 1 recommends that to locate a front, one should draw a tangent to the fractional saturation curve from the origin. In this paper I establish that this procedure will be correct only for the case of a zero initial...

.../surfactant/alcohol mixture. One interesting aspect of these experiments is the amount of microemulsion phase trapping. The endpoint microemulsion saturations for both the oil/microemulsion and brine/micro-emulsion phase pairs were high even at 10 −3 dyne/cm [10 −3 mN/m] interfacial tension (IFT...

... favorably affect the recovery efficiency of an immiscible gas-injection process. relative permeability gas injection method reservoir simulation displacement gravity drainage oil saturation analytical model permeability stratified reservoir flow in porous media enhanced recovery gravity-stable...

...Gábor Ács; Sándor Doleschall; Éva Farkas A direct sequential method has been developed to simulate isothermal compositional systems. The solution technique is the same as that of the implicit pressure, explicit saturation (IMPES) method: one pressure is treated implicitly and (instead of the phase...

... convergence cauchy problem galerkin scheme uniqueness constraint equation reservoir simulation coefficient upstream oil & gas collocation upstream collocation fluid dynamics saturation buckley-leverett problem gradient converge flow in porous media numerical solution petroleum engineer...

...Noaman El-Khatib A mathematical model is developed for waterflooding performance in linear stratified systems for both cases of non-communicating layers with no crossflow and communicating layers with complete crossflow. The model accounts for variation of porosity and saturation in addition...

... that places it in the public domain. bitumen steam-assisted gravity drainage rimrock fluid dynamics enhanced recovery saturation utah tar sand pattern size experiment oil sand oil recovery reverse combustion injector tar sand injection rate reaction sagd combustion flow in porous media...

.... 12 4 1983 30 4 1984 14 11 1983 1 4 1985 1 4 1985 Copyright 1985, Society of Petroleum Engineers conservation equation simulator upstream oil & gas sagd reservoir simulation relative permeability permeability factorization saturation heat capacity...

... is injected, the ultimate energy recovery will increase many-fold. 12 3 1984 15 5 1984 23 3 1984 1 4 1985 1 4 1985 Copyright 1985, Society of Petroleum Engineers pruess steam rate production well geothermal reservoir hydraulic fracturing injection vapor saturation...

... on the thermodynamic conditions of a reservoir in the natural state, especially on temperature distributions and phase compositions. The gas will expand two-phase zones and increase gas saturations to enable flow of CO 2 through the system. During exploitation, the early pressure drop primarily results from "degassing...

... to a random electrical network of resistors, batteries, and diodes. From the numerical solution of the latter, we compute the fluid velocities and saturation rates of change and use a discrete timestepping procedure to follow the subsequent motion. The scale of the computation has restricted us so far...

... frequency. A second dimension is used to describe events in the matrix blocks adjacent to the fissures. The model consists of fuel, oxygen, oil, hydrocarbon gas, and energy balances. No water balance is included since, under the conditions in which we are interested, connate water saturations of only 5...

... saturation. In other experiments, water (the wetting phase) at irreducible saturation was displaced by a distinguishable injected aqueous phase. Injected hydrocarbon appeared in the produced fluids immediately after oil breakthrough, yielding behavior similar to the micellar-slug experiments. Even...

... in gas reservoirs occurs when the reservoir pressure drops below the dewpoint of the gas. Condensed liquid will drain downward by gravity when its saturation exceeds the irreducible condensate saturation. Recent studies 1 , 2 have shown that in highly permeable, nonfractured water-wet, connate...