Surfactant-Polymer Coreflood Simulation and Uncertainty Analysis Derived from Laboratory Study

Abstract

Abstract. This paper presents a numerical simulation study on coreflood scale derived from a laboratory study conducted on light oil and water-wet sandstone samples from fields at Tempino and Kenali Asam, Sumatra, Indonesia. A rigorous laboratory study prompted a specified surfactant type among dozens of screened samples, i.e. AN3NS and AN2NS-M for Kenali Asam and Tempino, respectively. The coreflood scale numerical simulation study was performed using a commercial simulator, on the basis of the results from the laboratory study, at a constant temperature of 68°C, 0.3 cc/min injection rate and under 120 psia confining pressure. To get better recovery, the cores were tested using surfactant and polymer in a blended mode, containing 0.03% w/w polymer diluted in each field brine, which accommodated around 8000 ppm salinity. The most significant variable in the multiphase flow is the relative permeability curve, which is affected by interfacial tension (IFT) during waterflooding and surfactant-polymer (SP) flooding. This study shows that relative permeability will be shifted at ultra-low IFT (10 -3 to 10 -4 mN/m). This shifting phenomenon is governed by the interpolation parameter set, which implicitly represents the capillary number. Further work in matching the numerical results to the coreflood was conducted by changing the interpolation parameters.

Wetting prevention in membrane distillation through superhydrophobicity and recharging an air layer on the membrane surface

“… reducing the energy of the interface [45], and  covering hydrophobic groups at the membrane surface with hydrophilic surfactant molecules By increasing the concentration of the surfactant in the system, micellization may happen (aggregation of surfactant molecules). The minimum concentration at which micellization starts is known as the critical micelle concentration (CMC) [46].…”

Synthesis, physiochemical characterization, and in vitro antitumor activity of the amide and pH cleavable hydrazone conjugates of γ-tocotrienol isomer of vitamin E with methoxy-poly(ethylene) glycol

“…The lower CMC values of the hydrazone and amide conjugates could be attributed to their higher hydrophilicity due to the presence of -N- atom, which imparts basicity to the molecules due to the availability of a lone pair of electrons for proton acceptance. Surfactants with higher polarity partition more efficiently into the water interface leading to a decrease in surface free energy at lower surfactant concentrations and thereby surfactant aggregation and micelles formation at lower concentrations [15]. Micelles formed by the amide conjugate had the smallest particle size (∼50 nm, Fig.…”

Well and Inflow Performance Relationship for Heavy Oil Reservoir under Heating Treatment

“…2 and 3 by Pennel et al (1996); Lenormand et al (1988)). There has also been a research done on altering capillary number on EOR process (Hakiki et al, 2015). The study found that rock-fluid interaction is also exhibited by relative permeability.…”

“…4 (Schrader, 1995). It is obvious that interfacial tension plays the role in producing more oil (Hakiki, 2014;Hakiki et al, 2015). For this reason, there might be a possibility that electrical downhole heating also change both wettability and oil-water interfacial tension .…”