Experimental study and new three-dimensional kinetic modeling of foamy solution-gas drive processes

Abstract

Foamy solution-gas drive processes in heavy oil reservoirs are very complex. The influence of some microscopic factors on this process is not fully understood due to limitations of traditional depletion tests. This study aims to investigate foamy solution-gas drive by experiments and simulations. First, the effects of the pressure depletion rate on critical gas saturation and foamy solution-gas drive processes were investigated by laboratory experiments. Second, a new three-dimensional foamy oil model that captures many important characteristics of foamy solution-gas drive, such as non-equilibrium behavior, gas evolution kinetics, and the effect of viscous forces on gas mobility, was developed. Last, the effects of some important parameters on foamy solution-gas drive were systematically investigated,and a model application was conducted in a typical foamy oil reservoir. The results indicate that the new model is capble of simulating many of the unusual behaviors observed in foamy solution-gas drive on a laboratory and field scales. High oil recoveries were obtained with a high oil viscosity, high depletion rate, long sandpack, and low solution gas-oil ratio. Foamy solution-gas drive processes are sensitive to the depletion rate, length, and critical gas saturation. The oil viscosity, solution GOR and diffusion coefficient are not sensitive factors.

Hydrothermal Dolomite Paleokarst Reservoir Development in Wolonghe Gasfield, Sichuan Basin, Revealed by Seismic Characterization

“…The application described in this paper first extracts seismic wavelets from the side of the well, calculates the reflection coefficient of the acoustic logging curve, and convolves this reflection coefficient, and finally determines the time-depth relationship of the well. Well W92 shows the synthetic seismic trace and the actual seismic trace with the same wavelet frequency along the side of the well in red and blue, respectively [35]. The morphology of the seismic waves of the synthetic seismic record track and the seismic track near the well is the same, and the correlation exceeds 0.9, indicating that there is a good matching relationship between the results of well logging and the results of seismic exploration (Figure 10).…”

“…relationship of the well. Well W92 shows the synthetic seismic trace and the actual seismic trace with the same wavelet frequency along the side of the well in red and blue, respectively [35]. The morphology of the seismic waves of the synthetic seismic record track and the seismic track near the well is the same, and the correlation exceeds 0.9, indicating that there is a good matching relationship between the results of well logging and the results of seismic exploration (Figure 10).…”

Stability Analysis of Anionic-CO2-Soluble Surfactant Di-(2-ethylhexyl) Sodium Sulfosuccinate-Assisted Oily Foam Based on Statistical Analysis of Bubble Dynamic Characteristics

“…Evaluation indicators of the foamy system generally include the foam pseudo expansion coefficient E pb and the foam half-life t 0.5 , but the goodness of a single indicator is not enough to reflect the performance of the foamy system, so the foam composite index S is used to evaluate the foamy system. 23,24 As shown in Figure 4 where S the foam comprehensive index (in mL min), t 0 is the time to reach maximum foam volume (in minutes), t 0.5 is the half-life of the foam (in minutes), and f(t) is a specific function of foaming volume and foaming time, obtained through fitting experimental data.…”

A Potential Parameter for A Non-Darcy Form of Two-Phase Flow Behaviour, Compressibility Related

“…At higher depletion rates, the oil recovery and production profile of crude oil with asphaltene is different from those without asphaltenes [15]. The values of apparent viscosity inferred from applications of classical solution-gas drive models to match the production performance are broadly less than that of those with gas behavior [16]. No exploratory check of this component has been accounted for so far in open writing.…”