Journal article 1067 views 198 downloads
Hydration induced morphological change on proppant surfaces employing a calcium-silicate cement system
,
Zeyad Almutairi,
Bjornar Sandnes ,
Andrew Barron
Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume: 537, Pages: 197 - 209
Swansea University Authors:
Covandonga Correas, Enrico Andreoli , Bjornar Sandnes , Andrew Barron
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DOI (Published version): 10.1016/j.colsurfa.2017.10.006
Abstract
Commercial aluminosilicate proppant particles have been coated with Ca-Si oxides, with the aim to provide an in-situ increase in the angularity (decrease in Krumbein roundness value) to facilitate their immobilization. Ca-Si oxide systems have been synthesized via sol-gel, cured, and sintered at 120...
| Published in: | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
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| ISSN: | 0927-7757 |
| Published: |
2018
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa35976 |
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| Abstract: |
Commercial aluminosilicate proppant particles have been coated with Ca-Si oxides, with the aim to provide an in-situ increase in the angularity (decrease in Krumbein roundness value) to facilitate their immobilization. Ca-Si oxide systems have been synthesized via sol-gel, cured, and sintered at 1200 °C using (a) CaCO3, (b) CaCO3 + orthosilicic acid (Si(OH)4, SA), and (c) CaCO3 + fused silica (SiO2, FS). When the proppant is cured in the presence of CaCO3 and silicic acid the coatings undergo a significant compositional change, while sintering results in the conversion of the cured samples to ceramic agglomerates with the desired “popcorn” shapes. The best results are obtained in the presence of Si reagents, and hydration of these sintered proppants allows for a distinct increase in the angularity, which is the desired transformation to allow the proppant to be locked-in-place once located in the reservoir. The samples have been characterized at each stages of preparation by scanning electron microscopy (SEM) with associated energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), X-rad diffraction (XRD) and infrared (IR) spectroscopy. |
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| Keywords: |
Proppant; CaCO3; cement; fumed silica; orthosilicic acid; calcium silicate cement |
| College: |
Faculty of Science and Engineering |
| Start Page: |
197 |
| End Page: |
209 |