Hydrophobic silica nanoparticle-stabilized invert emulsion as drilling fluid for deep drilling

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英文篇名：Hydrophobic silica nanoparticle-stabilized invert emulsion as drilling fluid for deep drilling 作者：Maliheh ; Dargahi-Zaboli ; Eghbal ; Sahraei ; Behzad ; Pourabbas 英文作者：Maliheh Dargahi-Zaboli;Eghbal Sahraei;Behzad Pourabbas;Department of Chemical Engineering, Petroleum Research Center, Sahand University of Technology;Department of Polymer Engineering, Nanostructured Materials Research Center, Sahand University of Technology; 英文关键词：Deep drilling;;Drilling fluid model;;Hightemperature aging;;Rheology;;Silica nanoparticles;;Stable invert emulsion 中文刊名：SYKX 英文刊名：石油科学(英文版) 机构：Department of Chemical Engineering, Petroleum Research Center, Sahand University of Technology;Department of Polymer Engineering, Nanostructured Materials Research Center, Sahand University of Technology; 出版日期：2017-02-15 出版单位：Petroleum Science 年：2017 期：v.14 语种：英文; 页：SYKX201701008 页数：11 CN：01 ISSN：11-4995/TE 分类号：107-117

摘要

An oil-based drilling fluid should be stable and tolerant to high temperatures for use in deep drilling. An invert emulsion of water in oil is a good choice as an oilbased drilling fluid which is a mixture of a solid phase and two immiscible liquid phases stabilized by a polymeric surfactant. In deep drilling, due to high temperatures, the polymeric surfactant degrades and a phase separation occurs. Here, octadecyltrimethoxysilane-modified silica nanoparticles were used to form a stable invert emulsion of water in oil for the drilling fluid model which resulted in a milky fluid with the formation of 60 μm water droplets. In addition, rheological study showed that using hydrophobic silica nanoparticles resulted in a stable water in oil invert emulsion with desired properties for a drilling fluid that can be modified by adjusting the nanoparticle nature and content. Aging experiments at 120 °C indicated that they also have good stability at high temperatures for challenging drilling operations.
        An oil-based drilling fluid should be stable and tolerant to high temperatures for use in deep drilling. An invert emulsion of water in oil is a good choice as an oilbased drilling fluid which is a mixture of a solid phase and two immiscible liquid phases stabilized by a polymeric surfactant. In deep drilling, due to high temperatures, the polymeric surfactant degrades and a phase separation occurs. Here, octadecyltrimethoxysilane-modified silica nanoparticles were used to form a stable invert emulsion of water in oil for the drilling fluid model which resulted in a milky fluid with the formation of 60 μm water droplets. In addition, rheological study showed that using hydrophobic silica nanoparticles resulted in a stable water in oil invert emulsion with desired properties for a drilling fluid that can be modified by adjusting the nanoparticle nature and content. Aging experiments at 120 °C indicated that they also have good stability at high temperatures for challenging drilling operations.

引文

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