A Modified Contact Angle Measurement Process to Suppress Oil Drop Spreading and Improve Precision

Deng, Xiao; Zhou, Xianmin; Kamal, Muhammad Shahzad; Hussain, Syed Muhammad Shakil; Patil, Shirish

doi:10.3390/molecules27041195

Cited by 8 publications

(2 citation statements)

References 63 publications

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“…All CA measurements were conducted under ambient conditions using an Attension Theta Optical Tensiometer provided by Biolin Scientific. Following the modified method described by Deng et al, 57 the J-shaped method was used where the surrounding phase is the denser phase (water in this case) and the droplet formed by injecting the lighter phase (oil in this case). The CA is then measured relative to the lighter phase.…”

Section: Rock/fluid Parametersmentioning

confidence: 99%

Enhanced Oil Recovery in Carbonate Reservoirs Using Single Component Synthesized Surfactants under Harsh Reservoir Conditions

et al. 2023

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Surfactants are commonly used for enhanced oil recovery (EOR) applications in carbonate hydrocarbon reservoirs due to their ability to reduce oil/water interfacial tension (IFT) and/or alter rock wettability toward more water-wet conditions. They are usually used as formulations consisting of more than two surfactants to achieve optimum performance. Although this approach may result in extra recovery in coreflooding experiments, there is a risk of chromatographic separation and potential phase separation when these surfactants are injected into the reservoir. The current study, however, focuses on injecting a single component ethoxylated quaternary ammonium cationic Gemini surfactant (GS) or a betaine-type zwitterionic surfactant (ZIS), both synthesized in-house, to mitigate these potential issues. Several coreflooding experiments were conducted using Indiana limestone samples at 100 °C, pressures greater than 3000 psi, and seawater and formation water salinities of 57,745 ppm and 213,768, respectively. Continuous injection of either surfactant solution (at 2500 ppm in seawater) after seawater flooding recovered almost 11−12% of the initial oil in the core (OOIP). The results demonstrate that the GS or the ZIS alone can achieve this relatively high oil recovery without the need for additional cosolvent(s) or cosurfactant(s), unlike most of the previously developed surfactant formulations. Injecting a one-pore-volume slug of a standard acrylamide copolymer at 2000 ppm between the seawater and the surfactant floods increased the oil recovery by either surfactant to around 16−17% OOIP. This improvement in oil recovery was mainly due to wettability alteration from oil-wet to intermediate-wet conditions, as revealed by the contact angle and oil/water IFT measurements. Effluent analysis of the produced aqueous phase showed surfactant dynamic retention values of 0.44 and 0.61 mg/g-rock of both the GS and the ZIS, respectively. Such high oil recovery and low dynamic retention reflect the high efficiency of the GS and the ZIS for EOR applications in carbonate reservoirs.

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Section: Rock/fluid Parametersmentioning

confidence: 99%

Enhanced Oil Recovery in Carbonate Reservoirs Using Single Component Synthesized Surfactants under Harsh Reservoir Conditions

et al. 2023

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“…Figure 2. Contact angle measurement method: (a) the CA measurement instrument and (b) an illustration of how oil/water CA is measured 37. …”

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confidence: 99%

Wettability Alteration of Carbonate Rock by Chelating Agents and Viscoelastic Surfactants: Synergetic Impact

et al. 2022

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In enhanced oil recovery, surfactants are injected to recover the residual oil by reducing the oil/water interfacial tension or by altering the wettability of the rock. Viscoelastic surfactants are a special class of surfactants that can also control mobility due to their viscoelastic nature, in addition to lowering interfacial tension. However, detailed studies of wettability alteration by viscoelastic surfactants are still needed. Chelating agents have recently gained attention as an alternative to low-salinity water in enhanced oil recovery due to their capability to capture metal ions. This study used the contact angle measurement to investigate the synergetic impact of chelating agents and viscoelastic surfactants on the wettability alteration of carbonate rock. The wettability alteration performance of a viscoelastic surfactant (VES) and five chelating agents in deionized water, synthetic seawater, and diluted synthetic seawater solutions was studied. Their wettability alteration performance was compared by contact angle difference before and after soaking oil-wet Indiana limestone samples in the chelating agent solutions. Results showed that all tested chelating agents exhibit strong wettability alteration performance in deionized water solution. Increased salinity impairs the wettability alteration performance due to the consumption of chelating agent molecules by metal ions. The studied VES has weak wettability alteration performance when dissolved in synthetic seawater alone. Solutions combining VES and chelating agents, however, exhibited moderate to strong wettability alteration performance. With the addition of the chelating agent into VES solutions, the salinity tolerance and wettability alteration performance are significantly improved. The optimum formulation of viscoelastic surfactant and chelating agent changed the wettability from strongly oil-wet (163.0°) to water-wet (64.2°). The wettability alteration by VES and chelating solutions is a gradual process and could be further enhanced at reservoir temperature.

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Recent advances in the application of nanoparticles: focus on enhanced oil recovery

Bernuy,

Mendiburu,

Huallpachoque

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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A Modified Contact Angle Measurement Process to Suppress Oil Drop Spreading and Improve Precision

Cited by 8 publications

References 63 publications

Enhanced Oil Recovery in Carbonate Reservoirs Using Single Component Synthesized Surfactants under Harsh Reservoir Conditions

Enhanced Oil Recovery in Carbonate Reservoirs Using Single Component Synthesized Surfactants under Harsh Reservoir Conditions

Wettability Alteration of Carbonate Rock by Chelating Agents and Viscoelastic Surfactants: Synergetic Impact

Recent advances in the application of nanoparticles: focus on enhanced oil recovery

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