Showing papers on "Multiphase flow published in 1969"

Numerical, Three-Phase Simulation of the Linear Steamflood Process

Abstract: A numerical mathematical model is described on the steam-flood process which depends on fewer restrictive assumptions than models previously reported, but the solution of which is economically obtained. Example calculations are presented which, on comparison with experimental results, tend to validate the model. Results which expose certain process mechanics are discussed. The model describes the simultaneous flow of 3 phases--oil, water, and gas--in one dimension. It includes the effects of 3-phase relative permeabilities, capillary pressure, and temperature- and pressure-dependent fluid properties. Interphase mass transfer of water-steam is allowed, but the oil is assumed nonvolatile and the hydrocarbon gas insoluble in the liquid phases. The model allows heat convection in one dimensional and 2-dimensional heat conduction in a vertical cross section spanning the oil sand and adjacent strata. The hydrocarbon-steam gas composition is tracked, but the effect of gas composition on water-steam phase behavior is neglected. The model is solved numerically in 3 separate stages. (12 refs.)

Stream channel concept applied to water flood performance calculations for multi-well, multi-zone three component cases

Abstract: The Higgins-Leighton technique for estimating waterflood performance was expanded to include the calculation of fluid production and injection for a multi-well, multi-zone system with asymmetrical drainage areas. This 2-dimensional, analytical method is based on the computer solution of streamlines, shape factors, waterflood performance by channels, and well-zone-field production combinations. The flow regime for each injector-producer pair in the system is represented by a series of channels whose sides are bounded by streamlines. Each channel may have a unique value for porosity, water saturation, and permeability. The channels are divided into equal volume cells to permit approximation of Buckley-Leverett linear displacement, with radial flow occurring through the cells adjacent to the producer and injector, and linear flow through the remaining cells. Initial conditions may include gas saturation for partial depletion. Streamline positions are generated from the solution of the flow potential in the Laplace equation for steady-state flow of 2 fluids of unit mobility in a uniform bed of constant porosity, water saturation, and absolute permeability.