Pore-scale events in drainage process through porous media under high- and low-interfacial tension flow conditions

Jamaloei, Benyamin Yadali; Kharrat, Riyaz; Asghari, Koorosh

doi:10.1016/j.petrol.2010.11.006

Cited by 13 publications

(2 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lower limit of the pore distribution where the oil was recoverable corresponds to T 2 values of 2.68 ms, 1.29 ms, and 0.74 ms at the injection pressure of 5 MPa, 11 MPa, and 16 MPa, respectively. This is because the CO 2 overcomes the capillary pressure and enters smaller pores with higher injection pressure [35]. Moreover, when the injection pressure is higher than the MEP, the injected CO 2 extracts the oil in the smaller and blind pores, which converts the residual oil into recoverable oil.…”

Section: Effect Of Cycle Number On Residual Oilmentioning

confidence: 99%

Experimental Investigation on Microscopic Residual Oil Distribution During CO2 Huff-and-Puff Process in Tight Oil Reservoirs

et al. 2018

View full text Add to dashboard Cite

The determination of microscopic residual oil distribution is beneficial for exploiting reservoirs to their maximum potential. In order to investigate microscopic residual oil during the carbon dioxide (CO2) huff-and-puff process in tight oil reservoirs, several CO2 huff-and-puff tests with tight sandstone cores were conducted at various conditions. Then, nuclear magnetic resonance (NMR) was used to determine the microscopic residual oil distribution of the cores. The experiments showed that the oil recovery factor increased from 27.22% to 52.56% when injection pressure increased from 5 MPa to 13 MPa. The oil recovery was unable to be substantially enhanced as the injection pressure further increased beyond the minimum miscible pressure. The lower limit of pore distribution where the oil was recoverable corresponded to relaxation times of 2.68 ms, 1.29 ms, and 0.74 ms at an injection pressure of 5 MPa, 11 MPa, and 16 MPa, respectively. Longer soaking time also increased the lower limit of the oil-recoverable pore distribution. However, more cycles had no obvious effect on expanding the interval of oil-recoverable pore distribution. Therefore, higher injection pressure and longer soaking time convert the residual oil in smaller and blind pores into recoverable oil. This investigation provides some technical ideas for oilfields in design development programs for optimizing the production parameters during the CO2 huff-and-puff process.

show abstract

Section: Effect Of Cycle Number On Residual Oilmentioning

confidence: 99%

Experimental Investigation on Microscopic Residual Oil Distribution During CO2 Huff-and-Puff Process in Tight Oil Reservoirs

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Owing to the heavy oil with high viscosity and poor mobility, Yadali Jamaloei et al − believes that the low-tension polymer flooding (LTPF) process is obviously superior to that of AS flooding for some heavy oils, which suffers from weak in situ surfactant production due to low acid number. However, the main technical challenge for the LTPF process is that serious fingering may occur in the viscous-oil displacement process. − Some field tests reported have indicated that chemical flooding, if properly designed and monitored carefully, is an economically practicable technique for application in waterflooded heavy oil reservoirs. − …”

Section: Introductionmentioning

confidence: 99%

Effect of the Addition of Low Molecular Weight Alcohols on Heavy Oil Recovery during Alkaline Flooding

Pei

Zhang

et al. 2014

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

This study presents an experimental study, including interfacial tension (IFT) measurements, sandpack flood tests, and microscopic studies, for investigating the effect of the addition of low molecular weight alcohols on heavy oil recovery during alkaline flooding. According to the IFT results, the addition of low molecular weight alcohols can be detrimental to IFT reduction for the alkaline/heavy oil system, due to the partitioning of the alcohol molecules at the oil−water interface reducing the interfacial space available for surfactant molecules. However, sandpack floods conducted with the addition of the low molecular weight alcohols show a marked improvement in oil recovery over the alkaline-only flooding. The incremental oil recovery increases with the alcohol chain length from methanol to n-pentanol, but for the less water-soluble isoamyl alcohol and n-hexanol, the incremental oil recovery starts to decrease. The microscopic studies indicate that the alcohol additives can accelerate the reaction rate to produce large amounts of small water droplets inside the oil phase (W/O droplet flow), which reinforces the Jamin effect to improve sweep efficiency. Meanwhile, the addition of low molecular weight alcohols can also lead to the reduction in water-in-oil (W/O) emulsion viscosity, which contributes to the mobilization of trapped W/O emulsions, thereby improving the displacement efficiency of the alkaline flooding process.

show abstract

Dissolution Dynamics of Liquid/Liquid Binary Mixtures Within a Micromodel

Stevar

Vorobev

2013

Transp Porous Med

View full text Add to dashboard Cite

We report optical observations of the dissolution behaviour of glycerol/water, soybean oil/hexane, and isobutyric acid (IBA)/water binary mixtures within a glass micromodel built as a 2D regular network of capillary tubes with diameter of 0.2 mm. The micromodel is initially filled with solute and then is horizontally immersed into a thermostatic solvent-filled bath. The micromodel is open at its corners for solute dissolution to occur with no pressure gradients being applied. Our study shows that the solvent penetration into the micromodel is diffusion-dominated in completely miscible binary mixtures (glycerol/water and soybean oil/hexane). This is, however, non-Fickian diffusion with the dissolution rate, dV /dt, being proportional to D 1/3 t −0.4 for almost the entire duration of the experiment (V is the volume occupied by the solvent, D is the diffusion coefficient, and t is time). For the partially miscible IBA/water mixture the experiments performed at undercritical temperatures revealed that the diffusive transport was negligible despite the mixture being out of its thermodynamic equilibrium. The water phase penetrated into some of the channels, but IBA was never completely displaced/dissolved from the micromodel and numerous interfaces remained visible after very long-time periods.

show abstract

Pore-scale events in drainage process through porous media under high- and low-interfacial tension flow conditions

Cited by 13 publications

References 78 publications

Experimental Investigation on Microscopic Residual Oil Distribution During CO2 Huff-and-Puff Process in Tight Oil Reservoirs

Experimental Investigation on Microscopic Residual Oil Distribution During CO2 Huff-and-Puff Process in Tight Oil Reservoirs

Effect of the Addition of Low Molecular Weight Alcohols on Heavy Oil Recovery during Alkaline Flooding

Dissolution Dynamics of Liquid/Liquid Binary Mixtures Within a Micromodel

Contact Info

Product

Resources

About