Fluid-Fluid Interactions Inducing Additional Oil Recovery during Low Salinity Water Injection in Inefficacious Presence of Clay Minerals

Mehraban, Mohammad Fattahi; Farzaneh, Seyed Amir; Sohrabi, Mehran; Sisson, Adam L.

doi:10.1016/j.fuel.2021.121922

Cited by 20 publications

(7 citation statements)

References 56 publications

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“…Irrespective of the chosen method to determine zeta potential, it is still unclear if it provides an accurate representation of the oil/water interface of interest during oil recovery. First, the stability of the interface is questionable as it may evolve during recovery, especially with the formation of water micro-droplets [21][22][23][24]. Hence, measurement of oil/water zeta potential may only represent a (a) (b) snapshot of the interface, not representative of the entire recovery process.…”

Section: General Conclusion On Zeta Potentialmentioning

confidence: 99%

“…However, modification of many parameters can result in wettability alteration, and the most common suggested mechanisms are mineral dissolution, surface charge alteration by multi-ionic exchange, or double layer expansion [15][16][17][18][19][20]. In recent years, many studies have highlighted the importance of the oil/water interactions in impacting the LSE, especially with the spontaneous formation of water-in-oil micro-droplets [21][22][23][24], and thus on the importance of oil/water interface in the mechanism of additional recovery [25,26]. Hence, both rock/water and oil/water interactions are important to understand LSE.…”

Section: Introductionmentioning

confidence: 99%

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Relevance of zeta potential as a tool for predicting the response of controlled salinity waterflooding in oil–water-carbonate systems

Rodrigues

Levant

Klimenko

2022

Fuel

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Section: General Conclusion On Zeta Potentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Relevance of zeta potential as a tool for predicting the response of controlled salinity waterflooding in oil–water-carbonate systems

Rodrigues

Levant

Klimenko

2022

Fuel

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“…The injection of ion-engineered water or low-salinity water (LSW) into the reservoir for improved recovery has gained attention over the decade with efforts dedicated to understand the mechanism responsible for the observed improvements. The different mechanisms postulated include wettability alteration, mineral dissolution, multi-ion exchange, double-layer expansion, and so on. − Several studies cover carbonate and sandstone formations with less attention being paid to their effects on iron minerals and clay. Thus, this section of our study aims to understand the role of ion-engineered fluid in the iron mineral surface charge development.…”

Section: Resultsmentioning

confidence: 99%

Effects of the Reservoir Environment and Oilfield Operations on the Iron Mineral Surface Charge Development: An Insight into Their Role in Wettability Alteration

et al. 2022

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Iron minerals are hydrophobic minerals predominately found in sandstone formations with their role in wettability alteration not fully understood. With the reservoir rock being a complex system of multiple minerals, the control of wettability alterations becomes difficult to manage due to the different surface chemistry of constituent minerals. This study presents for the first time the surface charge development of pyrite, magnetite, and hematite minerals in native reservoir environments and the effect of oilfield operations such as acidizing, water injection, polymerization, surfactant flooding, and alkaline flooding on iron minerals, surface charge development. This was achieved using zeta potential measurement, which depicts the type of surface charge and infers the propensity of precipitation. The experimental results show that pyrite, magnetite, and hematite behave similarly under reservoir conditions with all the minerals being positively charged although pyrite and hematite are negatively charged in seawater (SW). Results also show that the surface charge development is controlled by the electrical double-layer effect and ion adsorption on the mineral surfaces. These findings provide key insights into the role of iron minerals in wettability alteration as they provide surfaces that serve as a precursor for polar crude component adsorption. Also, the design of an ion-engineered fluid to control the surface charge of iron minerals was implemented, and the results showed that they behave differently. Furthermore, the effect of low-salinity water on the mineral surface charge was examined. The findings revealed that low-salinity water can produce a negatively charged surface, however, cannot mitigate the iron mineral precipitation challenge as the observed zeta potential values are near zero. Finally, slug and continuous injection of the ethylenediaminetetraacetic acid chelating agent was implemented as an iron mineral precipitation control strategy, with the continuous injection observed to significantly improve the colloidal stability of the iron minerals in the reservoir native state and after SW injection.

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“…The relatively simple oil composition minimizes potential effects from oil-ion adsorption, which can affect oil recovery for more complex crude oils. 47 2.3. Model Carbonate Media.…”

Section: Methodsmentioning

confidence: 99%

Wettability Alteration and Enhanced Oil Recovery in Carbonate Porous Media by Tuning Waterflood Chemistry

Bribiesca Rodriguez,

Shaffer

2024

Energy Fuels

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Waterflooding for enhanced oil recovery (EOR) is described by a multiphase system consisting of oil, the hosting rock reservoir matrix, and an invading fluid (IF) that is injected into the reservoir to displace the residual oil. Wettability is one of the unique physicochemical properties of this multiphase system that is known to influence oil displacement by the IF and affect oil recovery. Tuning IF chemistry, such as through low salinity waterflooding, has been shown to alter the wettability of the reservoir media for increased oil recovery. For carbonate rock reservoirs, specifically, reports of wettability alteration with changes in IF chemistry have been inconsistent, and the role of divalent potential-determining ions in altering carbonate reservoir wettability is debated. The lack of understanding of how IF chemistry alters wettability in carbonate reservoirs limits field-scale predictions of EOR effectiveness. This research systematically evaluated the interactions of different IF compositions with model oil-wet carbonate media and correlated these interactions to fluid displacement patterns observed during waterflooding of carbonate granular media in a Hele-Shaw cell. Fluid displacement stability was quantified by the fractal dimension of the displaced fluid area, which was compared across time and length scales using the effective capillary number. Results show that dissolved calcium ions specifically interact with oil-wet carbonate surfaces to reduce the magnitude of the negative surface charge and alter wettability, resulting in more stable fluid displacement patterns during waterflooding. The findings improve fundamental understanding of wettability alteration and have implications for the design of IFs for EOR in carbonate reservoirs.

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Fluid-Fluid Interactions Inducing Additional Oil Recovery during Low Salinity Water Injection in Inefficacious Presence of Clay Minerals

Cited by 20 publications

References 56 publications

Relevance of zeta potential as a tool for predicting the response of controlled salinity waterflooding in oil–water-carbonate systems

Relevance of zeta potential as a tool for predicting the response of controlled salinity waterflooding in oil–water-carbonate systems

Effects of the Reservoir Environment and Oilfield Operations on the Iron Mineral Surface Charge Development: An Insight into Their Role in Wettability Alteration

Wettability Alteration and Enhanced Oil Recovery in Carbonate Porous Media by Tuning Waterflood Chemistry

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