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首页> 外文期刊>ACS applied materials & interfaces >Graphene Oxide as a High-Performance Fluid-Loss-Control Additive in Water-Based Drilling Fluids
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Graphene Oxide as a High-Performance Fluid-Loss-Control Additive in Water-Based Drilling Fluids

机译：氧化石墨烯作为水基钻井液中的高性能流失控制添加剂

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摘要

Graphene oxide (GO) performs well as a filtration additive in water-based drilling fluids at concentrations as low as 0.2 % (w/w) by carbon content. Standard American Petroleum Institute (API) filtration tests were conducted on pH-adjusted, aqueous dispersions of GO and xanthan gum. It was found that a combination of large-flake GO and powdered GO in a 3:1 ratio performed best in the API tests, allowing an average fluid loss of 6.1 mL over 30 min and leaving a filter cake ～20 μm thick. In comparison, a standard suspension (～12 g/L) of clays and polymers used in the oil industry gave an average fluid loss of 7.2 mL and a filter cake ～280 μm thick. Scanning electron microscopy imaging revealed the extreme pliability of well-exfoliated GO, as the pressure due to filtration crumpled single GO sheets, forcing them to slide through pores with diameters much smaller than the flake's flattened size. GO solutions also exhibited greater shear thinning and higher temperature stability compared to clay-based fluid-loss additives, demonstrating potential for high-temperature well applications.
机译：氧化石墨烯（GO）在水基钻井液中作为过滤添加剂的性能很好，碳含量低至0.2％（w / w）。标准的美国石油协会（API）过滤测试是在GO和黄原胶的pH调节水分散液中进行的。发现在API测试中，大片状GO和粉末状GO的比例为3：1的组合效果最好，在30分钟内平均损失6.1 mL液体，并留下约20μm厚的滤饼。相比之下，石油工业中使用的粘土和聚合物标准悬浮液（〜12 g / L）的平均滤失量为7.2 mL，滤饼的厚度约为280μm。扫描电子显微镜成像显示，脱落的GO极具柔韧性，这是由于过滤造成的压力使单张GO片皱缩，迫使它们滑过直径远小于薄片扁平尺寸的孔。与粘土基失水添加剂相比，GO溶液还表现出更大的剪切稀化和更高的温度稳定性，证明了其在高温井应用中的潜力。

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