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

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 a...

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Autores principales: Mohammed, Isah, Al Shehri, Dhafer, Mahmoud, Mohamed, Kamal, Muhammad Shahzad, Alade, Olalekan, Arif, Muhammad, Patil, Shirish
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8911921/
https://www.ncbi.nlm.nih.gov/pubmed/35268840
http://dx.doi.org/10.3390/molecules27051739
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author Mohammed, Isah
Al Shehri, Dhafer
Mahmoud, Mohamed
Kamal, Muhammad Shahzad
Alade, Olalekan
Arif, Muhammad
Patil, Shirish
author_facet Mohammed, Isah
Al Shehri, Dhafer
Mahmoud, Mohamed
Kamal, Muhammad Shahzad
Alade, Olalekan
Arif, Muhammad
Patil, Shirish
author_sort Mohammed, Isah
collection PubMed
description 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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spelling pubmed-89119212022-03-11 Effect of Native Reservoir State and Oilfield Operations on Clay Mineral Surface Chemistry Mohammed, Isah Al Shehri, Dhafer Mahmoud, Mohamed Kamal, Muhammad Shahzad Alade, Olalekan Arif, Muhammad Patil, Shirish Molecules Article 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. MDPI 2022-03-07 /pmc/articles/PMC8911921/ /pubmed/35268840 http://dx.doi.org/10.3390/molecules27051739 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mohammed, Isah
Al Shehri, Dhafer
Mahmoud, Mohamed
Kamal, Muhammad Shahzad
Alade, Olalekan
Arif, Muhammad
Patil, Shirish
Effect of Native Reservoir State and Oilfield Operations on Clay Mineral Surface Chemistry
title Effect of Native Reservoir State and Oilfield Operations on Clay Mineral Surface Chemistry
title_full Effect of Native Reservoir State and Oilfield Operations on Clay Mineral Surface Chemistry
title_fullStr Effect of Native Reservoir State and Oilfield Operations on Clay Mineral Surface Chemistry
title_full_unstemmed Effect of Native Reservoir State and Oilfield Operations on Clay Mineral Surface Chemistry
title_short Effect of Native Reservoir State and Oilfield Operations on Clay Mineral Surface Chemistry
title_sort effect of native reservoir state and oilfield operations on clay mineral surface chemistry
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8911921/
https://www.ncbi.nlm.nih.gov/pubmed/35268840
http://dx.doi.org/10.3390/molecules27051739
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