A Surface Charge Approach to Investigating the Influence of Oil Contacting Clay Minerals on Wettability Alteration

Mohammed, Isah; Shehri, Dhafer Al; Mahmoud, Mohamed; Alade, Olalekan

doi:10.1021/acsomega.1c01221

Cited by 36 publications

(27 citation statements)

References 53 publications

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“…The positive surface charge can be attributed to the cations present in the system; however, because of the different hydration stabilities of the cations, the observed positive surface charge is due to the Na atom rather than the Mg or Ca atoms, as their hydration stability would not allow them to approach the surface. In addition, the mode of cation interaction with the surface is via adsorption, as earlier reported by Mohammed et al [ 4 ], in the same pH range. In the case of SW, no pH change is observed, with the surface charge of chlorite being negative.…”

Section: Resultssupporting

confidence: 54%

“…The materials used in this study are as reported by Mohammed et al [ 4 ]. Mineral particles used are of average particle size of 11.28, 3.16, 4.57, and 2.64 µm, for chlorite, illite, kaolinite, and montmorillonite, respectively, with all chemicals used of American Chemical Society (ACS) reagent grade.…”

Section: Methodsmentioning

confidence: 99%

“…Reservoir rocks are predominantly made up of quartz or carbonate minerals with varying proportions of clays [ 2 ] and feldspar [ 3 ]. The most common group of individual clays found in the reservoir rocks are chlorite, illite, kaolinite, smectite, montmorillonite, or a mixture of clay layers [ 4 ]. These clays, when dispersed in the reservoir formation, predominantly control the pore space properties such as permeability and porosity of the rock.…”

Section: Introductionmentioning

confidence: 99%

“…The influence of rock minerals, such as clays on asphaltene adsorption, is the subject of another ongoing study; however, of interest to this study is the surface chemistry of clay minerals to access the propensity of these minerals to provide an adsorption-prone surface condition. This is critical, as a previous study [ 4 ] shows that, because the reservoir rock is composed of many minerals, an understanding of the crude contacting minerals is critical to prevent polar compound adsorption on the mineral surfaces.…”

Section: Introductionmentioning

confidence: 99%

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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: Resultssupporting

confidence: 54%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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“…It has been reported water chemistry (i.e. salt composition) can affect the surface charges of clay particles (Kumar et al 2017;Mohammed et al 2021). Unlike settling tests which can take weeks to measure appreciable settling in high clay, dispersed systems, the SRF was able to measure these effects in hours.…”

Section: Preliminary Stage: Srf Testmentioning

confidence: 99%

Assessing oil sands tailings consolidation using a modified benchtop filter press

Qureshi¹,

Li²,

Sedgwick³

et al. 2021

Paste 2021: 24th International Conference on Paste, Thickened and Filtered Tailings

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Open pit surface mining generates process effluents known as tailings. These mixtures accumulate in large impoundment structures typically termed as tailings ponds, which serve as storage structures where water from the tailings is separated and recycled back into the process. With the continuous accumulation of material in tailings ponds, and to comply with reclamation and water-use regulations, the industry is constantly seeking new technologies that can accelerate the tailings consolidation and dewatering process. Preliminary tools and techniques to screen potential consolidation technologies are valuable to quickly understand the effectiveness of the technology on the bench-scale before larger-scale testing. At present, settling tests have been the ideal medium for bench-scale study, however, this process can be time-intensive. This study compares a potential tool for short-term testing of consolidation, a benchtop filter press, with a standard settling test. The benchtop filter press is commonly used for the generation of specific resistance to filtration (SRF) data, however, the application for use in understanding consolidation is not. In this study, a benchtop filter press was modified to remove the limitation on the dewatering time due to the filter cake cracking, thus allowing dewatering past the liquid limit of the material. Two types of synthetic tailings were developed using a kaolinite and bentonite mix in synthetic process water, with varying solids content, methylene blue indices (MBI) and water chemistries, to mimic the conditions in actual mining samples.The study shows that the modified benchtop filter press results produce similar trends to settling tests and perform as expected with and without polymer addition. The modified benchtop filter press provides data in a course of hours to days, as compared to the settling test data that can take weeks to months to generate. Additionally, work conducted with oil sands fluid fine tailings (FFT) after various treatments, demonstrates that SRF curves from actual mining samples show trends in dewatering time consistent with observed field performance.

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Bacteriophages pass through candle‐shaped porous ceramic filters: Application for the collection of viruses in soil water

et al. 2022

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Despite the ubiquity of viruses in soils, their diversity in soil water has not been explored, mainly due to the difficulty of collecting them. In hydrology, soil water is usually collected using porous candles. This study proposes using these porous candles as a new tool for sampling viruses in soil water to analyze their passage through the ceramic part of the candles. The recovery of the viruses was determined after filtration under laboratory conditions using three model bacteriophages (MS2, ΦX174, and Φ6) and Escherichia coli, at neutral and acidic pH. Then, a field experiment was carried out where soil water filtration and viral identification by metagenomic shotgun were performed. At neutral pH, all bacteriophages tested successfully passed through the porous candles during the filtration process, with reductions of 0.02 log, 0.16 log, and 0.55 log for MS2 ΦX174 and Φ6, respectively. At pH 4.4, the passage of MS2 was not affected while ΦX174 underwent a slight reduction in recovery, probably caused by adsorption onto the filter material.Regarding the application of the porous candles in the field, the results obtained allowed the successful recovery of viruses, exposing porous candles as a new method suitable for the collection of viruses from soil water in the context of the study of viral communities.

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A Surface Charge Approach to Investigating the Influence of Oil Contacting Clay Minerals on Wettability Alteration

Cited by 36 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

Assessing oil sands tailings consolidation using a modified benchtop filter press

Bacteriophages pass through candle‐shaped porous ceramic filters: Application for the collection of viruses in soil water

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