Experimental Study of the Effect of Clay and Oil Polarity on Oil Recovery by Low Salinity Water Flooding Using Glass Micromodel

Kashiri, Razieh; Kalantariasl, Azim; Parsaei, Rafat; Zeinijahromi, Abbas

doi:10.1007/s11053-021-09877-7

Cited by 7 publications

(4 citation statements)

References 53 publications

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“…The injection of ion-engineered water, or low salinity water as it is popularly referred to, has gained acceptance in the industry. Several works of literature [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ] exist on oil recovery improvement due to ion-tuned water injection, with several mechanisms identified to be responsible for the observed recovery. This section examines the effect of ion-tuned water on the surface charge development of the particles under study.…”

Section: Resultsmentioning

confidence: 99%

Effect of Native Reservoir State and Oilfield Operations on Clay Mineral Surface Chemistry

et al. 2022

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An understanding of clay mineral surface chemistry is becoming critical as deeper levels of control of reservoir rock wettability via fluid–solid interactions are sought. Reservoir rock is composed of many minerals that contact the crude oil and control the wetting state of the rock. Clay minerals are one of the minerals present in reservoir rock, with a high surface area and cation exchange capacity. This is a first-of-its-kind study that presents zeta potential measurements and insights into the surface charge development process of clay minerals (chlorite, illite, kaolinite, and montmorillonite) in a native reservoir environment. Presented in this study as well is the effect of fluid salinity, composition, and oilfield operations on clay mineral surface charge development. Experimental results show that the surface charge of clay minerals is controlled by electrostatic and electrophilic interactions as well as the electrical double layer. Results from this study showed that clay minerals are negatively charged in formation brines as well as in deionized water, except in the case of chlorite, which is positively charged in formation water. In addition, a negative surface charge results from oilfield operations, except for operations at a high alkaline pH range of 10–13. Furthermore, a reduction in the concentrations of Na, Mg, Ca, and bicarbonate ions does not reverse the surface charge of the clay minerals; however, an increase in sulfate ion concentration does. Established in this study as well, is a good correlation between the zeta potential value of the clay minerals and contact angle, as an increase in fluid salinity results in a reduction of the negative charge magnitude and an increase in contact angle from 63 to 102 degree in the case of chlorite. Lastly, findings from this study provide vital information that would enhance the understanding of the role of clay minerals in the improvement of oil recovery.

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Section: Resultsmentioning

confidence: 99%

Effect of Native Reservoir State and Oilfield Operations on Clay Mineral Surface Chemistry

et al. 2022

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“…The injection of ion-engineered, or composition-tuned, water into the formations for enhanced recovery is widely recognized in the industry. This is seen in numerous publications (Lee et al, 2010;Shiran and Skauge, 2012;Myint and Firoozabadi, 2015;Derkani et al, 2018;Alfazazi et al, 2019;Darvish Sarvestani et al, 2021;Kashiri et al, 2021;Mokhtari et al, 2022) on recovery improvement due to ion-tuned water injection with several mechanisms identified to be responsible for the observed recovery. This section examines the effect of ion-tuned water on the surface charge development of the particles under study.…”

Section: Effect Of Ion Engineeringmentioning

confidence: 89%

Investigation of Surface Charge at the Mineral/Brine Interface: Implications for Wettability Alteration

et al. 2022

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The reservoir rock ismade up of differentminerals which contribute to the overall formation wettability. These minerals in their natural state differ in chemistry and structure, and thus behave differently in an environment of varying composition and salinity. These have direct implications for enhanced oil recovery due to water flooding, or wettability alteration due to long-term exposure to brine. With the reservoir rock being a complex system of multiple minerals, the control of wettability alterations becomes difficult to manage. One of the dominant mechanisms responsible for wettability alteration is the mineral surface charge, which is dependent on pH, and fluid composition (salt type and salinity). For the first time, the surface charge development of barite, dolomite, and feldspar minerals in their native reservoir environments (accounting for the formation brine complexity) is presented. Also, the effect of oilfield operations (induced pH change) on minerals’ surface charge development is studied. This was achieved by using the zeta potential measurements. The zeta potential results show that barite and dolomite minerals possess positively charge surfaces in formation water and seawater, with feldspar having a near-zero surface charge. Furthermore, the surface charge development is controlled by the H+/OH− (pH), electrical double-layer effect, as well as ion adsorption on the mineral’s surfaces. These findings provide key insights into the role of fluid environment (pH, composition) and oilfield operations on mineral surface charge development. In addition, the results show that careful tuning of pH with seawater injection could serve as an operational strategy to control the mineral surface charge. This is important as negatively charged surfaces negate wettability alteration due to polar crude oil components. Also, the design of an ion-engineered fluid to control the surface charge of minerals was implemented, and the results show that reduction in the Ca2+ concentration holds the key to the surface charge modifications. Surface charge modifications as evidenced in this study play a critical role in the control of wettability alteration to enhance production.

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“…Energies 2022, 15, 4906 18 of 20 Glass micromodel experiments, on the other hand, will allow for continuous real-time visualization of fluid flow processes throughout the experiment [45][46][47], but an investigation under reservoir conditions will require glass that can withstand high temperatures. Because glass may not be able to resist excessive pressure, a confining cell for the glass may be required for safety purposes [48] but adapted with ultrasound.…”

Section: Discussionmentioning

confidence: 99%

“…The confining pressure, core sizes, and type of fluid to be injected will all influence the design and material to be used. Glass micromodel experiments, on the other hand, will allow for continuous realtime visualization of fluid flow processes throughout the experiment [45][46][47], but an investigation under reservoir conditions will require glass that can withstand high temperatures. Because glass may not be able to resist excessive pressure, a confining cell for the Oil viscosity was reduced by ultrasonic, and the reduction was higher when the power and frequency were increased.…”

Section: Observationsmentioning

confidence: 99%

The Utilization of Ultrasound for Improving Oil Recovery and Formation Damage Remediation in Petroleum Reservoirs: Review of Most Recent Researches

et al. 2022

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The ultrasound method is a low-cost, environmentally safe technology that may be utilized in the petroleum industry to boost oil recovery from the underground reservoir via enhanced oil recovery or well stimulation campaigns. The method uses a downhole instrument to propagate waves into the formation, enhancing oil recovery and/or removing formation damage around the wellbore that has caused oil flow constraints. Ultrasonic technology has piqued the interest of the petroleum industry, and as a result, research efforts are ongoing to fill up the gaps in its application. This paper discusses the most recent research on the investigation of ultrasound’s applicability in underground petroleum reservoirs for improved oil recovery and formation damage remediation. New study areas and scopes were identified, and future investigations were proposed.

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Experimental Study of the Effect of Clay and Oil Polarity on Oil Recovery by Low Salinity Water Flooding Using Glass Micromodel

Cited by 7 publications

References 53 publications

Effect of Native Reservoir State and Oilfield Operations on Clay Mineral Surface Chemistry

Effect of Native Reservoir State and Oilfield Operations on Clay Mineral Surface Chemistry

Investigation of Surface Charge at the Mineral/Brine Interface: Implications for Wettability Alteration

The Utilization of Ultrasound for Improving Oil Recovery and Formation Damage Remediation in Petroleum Reservoirs: Review of Most Recent Researches

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