Effect of Temperature and Pressure on Contact Angle and Interfacial Tension of Quartz/Water/Bitumen Systems

Rajayi, Maryam; Kantzas, Apostolos

doi:10.2118/148631-pa

Cited by 29 publications

(15 citation statements)

References 60 publications

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“…Decreasing the pressure from 1,000 to 500 psi decreased the contact angle of the oil droplet slightly, which results in altering the rock wettability toward a more-water-wet state. The same behaviour was observed previously on quartz/water/bitumen systems, where the contact angle decreased with decrease of pressure below 500 psi (Rajayi and Kantzas 2011). Furthermore, at a pressure of 500 psi, more-waterwet conditions of muscovite surfaces were obtained by low-salinity water compared with high-salinity water.…”

Section: Resultssupporting

confidence: 87%

Investigation of Wettability Alteration and Oil-Recovery Improvement by Low-Salinity Water in Sandstone Rock

Nasralla

Bataweel

Nasr‐El‐Din

2013

Journal of Canadian Petroleum Technology

172

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Optimization of any oil-recovery process is based on understanding of the recovery mechanisms, whereas the underlying mechanisms of improving oil recovery by low-salinity-water injection are still debated. Wettability alteration is one of the mechanisms suggested to be the primary mechanism of low-salinity water. Therefore, wettability alteration by low-salinity water in sandstone reservoirs is examined by using the contact-angle technique. The effect of changing ionic strength on the electrokinetic charges is investigated by use of the zeta-potential technique to explain the causes of wettability alteration by low-salinity water. Moreover, coreflood experiments were performed in order to correlate between the wettability alteration and oil-recovery improvement caused by low-salinity water.Mica sheets were used for the contact-angle measurements to represent sandstone rock. The effect of water salinity on wettability was studied by using synthetic water over a wide range of salinities (from 0 to 174 000 mg/L), with two different crude oils at different conditions of pressure and temperature. Zeta-potential tests were conducted to measure the electrokinetic charges for combinations of each of the two crude oils or Berea sandstone and different brines. Berea sandstone cores were used for waterflooding experiments by injecting the same brines tested in the wettability measurements.Low-salinity water showed lower contact angles compared with high-salinity water for the two types of crude oil, which demonstrates the ability of low-salinity water to alter the rock wettability to more water-wet. In addition, low-salinity water made the surface charges at rock/brine and oil/brine interfaces strongly negative. As a result, the repulsive forces between rock and oil surfaces increase, which leads to expansion of the double-layer and, consequently, wettability alteration and oil-recovery improvement as confirmed by coreflood experiments.

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Section: Resultssupporting

confidence: 87%

Investigation of Wettability Alteration and Oil-Recovery Improvement by Low-Salinity Water in Sandstone Rock

Nasralla

Bataweel

Nasr‐El‐Din

2013

Journal of Canadian Petroleum Technology

172

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“…A number of laboratory and theoretical studies have been conducted to investigate the mechanisms of the effects of temperature, pressure, and the composition of each phase on the interfacial tension of crude-oil/brine systems (McCaffery, 1972;Wang & Gupta, 1995;Hjelmeland & Larrondo, 1986), water/bitumen systems (Rajayi & Kantzas, 2011), and gas/water systems (Rushing, et al, 2008;Okasha & Al-Shiwaish, 2010). However, experimental study of the effects of high saturation temperature and pressure on heavy-oil/steam interfacial tension was not well documented in the literature.…”

mentioning

confidence: 99%

A Laboratory Investigation of the Effects of Saturated Steam Properties on the Interfacial Tension of Heavy-Oil/Steam System Using Pendant Drop Method

Naser¹,

Permadi²,

Bae³

et al. 2015

EER

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For about a century, steam injection has been widely used as the most popular thermal recovery method for heavy-oil in sandstone reservoirs. In order to achieve higher recovery efficiency, which corresponds to the lowest possible value of residual oil saturation and economic success of steam injection projects, an accurate laboratory measurement of the interfacial tension between steam and heavy-oil is essential. However, laboratory investigation and visualization of the effects of steam injection on the interfacial tension between heavy-oil and steam as a function of saturation temperature and pressure is not well documented in the literature.The objective of this study is to investigate the influences of the two main factors which affect the interfacial tension of heavy-oil and steam namely saturation pressure and temperature. An optical cell, which was fitted with a goniometer system and a procedure to generate steam for the measurement of interfacial tension have been used. The difference between the density of heavy-oil and steam, which was used for pendant drop measurements, was calculated at specific temperature and pressure conditions using Katz's method. Meanwhile, the density of steam was obtained from an international steam table.The interfacial tension of heavy-oil/steam was measured in small intervals, ranging from 115 to 181 Celsius and 25 to 150 pounds per square inch. The results show that the interfacial tension decreases when the saturation temperature and pressure increases. This finding might be useful as an important reference for understanding and visualization the mechanism of interfacial tension during steam injection.

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“…The experimental results of Hjelmeland et al [44] show that the wettability of rock changes from oil to water with increasing temperature. Rajayi et al [45] measured through experiments that for quartz/water/bitumen systems, the rock will change from moisture to neutral moisture with the increase in temperature. H. Jabbari et al [46] believe that hot water injection can change the matrix from the neutral or oil-wet state to the water-wet state, thereby enhancing oil recovery.…”

Section: Wetting Anglementioning

confidence: 99%

Phase-Field Simulation of Imbibition for the Matrix-Fracture of Tight Oil Reservoirs Considering Temperature Change

Jin

Cheng

Cao

et al. 2021

Water

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Injection water temperature is often different from that of the reservoir during water injection development in the tight reservoir. Temperature change causes different fluid properties and oil-water interface properties, which further affects the imbibition process. In this paper, a matrix-fracture non-isothermal oil-water imbibition flow model in tight reservoirs is established and solved by the finite element method based on the phase-field method. The ideal inhomogeneous rock structure model was used to study the influence of a single factor on the imbibition. The actual rock structure model was used to study the influence of temperature. The mechanism of temperature influence in the process of imbibition is studied from the micro-level. It is found that the imbibition of matrix-fracture is a process in which the water enters the matrix along with the small pores, and the oil is driven into the macropores and then into the fractures. Temperature affects the imbibition process by changing the oil-water contact angle, oil-water interfacial tension, and oil-water viscosity ratio. Reducing oil-water contact angle and oil-water viscosity ratio and increasing oil-water interfacial tension are conducive to the imbibition process. The increase in injection water temperature is usually beneficial to the occurrence of the imbibition. Moreover, the actual core structure imbibition degree is often lower than that of the ideal core structure. The inhomogeneous distribution of rock particles has a significant influence on imbibition. This study provides microscale theoretical support for seeking reasonable injection velocity, pressure gradient, injection temperature, and well-shutting time in the field process. It provides a reference for the formulation of field process parameters.

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Effect of Temperature and Pressure on Contact Angle and Interfacial Tension of Quartz/Water/Bitumen Systems

Cited by 29 publications

References 60 publications

Investigation of Wettability Alteration and Oil-Recovery Improvement by Low-Salinity Water in Sandstone Rock

Investigation of Wettability Alteration and Oil-Recovery Improvement by Low-Salinity Water in Sandstone Rock

A Laboratory Investigation of the Effects of Saturated Steam Properties on the Interfacial Tension of Heavy-Oil/Steam System Using Pendant Drop Method

Phase-Field Simulation of Imbibition for the Matrix-Fracture of Tight Oil Reservoirs Considering Temperature Change

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