Xanthan gum is commonly used in drilling fluids to provide viscosity, solid suspension, and fluid-loss control. However, it is sensitive to high temperatures and not tolerant of field contaminants. This paper presents an experimental study on the effects of an eco-friendly biopolymer (diutan gum) on xanthan gum (XC) in a water-based bentonite mud. Laboratory experiments were carried out for different compositions of the biopolymers in water-based bentonite muds formulated without salt and in water-based bentonite muds containing sodium chloride (NaCl). The rheological properties of the water-based bentonite muds formulated with XC (2 Ibm) and those of the water-based bentonite muds prepared using XC (1Ibm) and diutan gum (1Ibm) were measured using Model 1100 viscometer after aging at 25 °C, 100 °C, and 120 °C for 16 h. The API fluid loss and filter cake of the mud formulations were measured using HTHP filter press. The properties of the water-based bentonite muds containing only XC were compared with those of the water-based bentonite muds containing XC and diutan gum. Presented results show that combining diutan gum and xanthan gum in a ratio of 1:1 in a water-based bentonite mud enhances its performance with respect to fluid properties—apparent viscosity, gel strength, yield points, YP/PV ratio, LSRV, n, and K. The fluid formulations also showed favorable mud cake building characteristics. Experimental data also indicate a 16%, 19%, and 34% reduction in API fluid loss values for the water-based benitoite muds containing XC in the presence of diutan gum after aging at 25 °C, 100 °C, and 120 °C for 16 h, respectively. Experimental results also show that the water-based benitoite mud containing XC and diutan gum would cause less formation damage and was tolerant of contamination with a monovalent cation (Na⁺). The synergy of xanthan gum and diutan gum can, therefore, improve the performance of water-based drilling fluids.

中文翻译：

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使用环保的生物聚合物增强黄原胶在水性泥浆体系中的性能

黄原胶通常用于钻井液中以提供粘度，固体悬浮液和流体损失控制。但是，它对高温敏感，对现场污染物不耐。本文介绍了一种环保型生物聚合物（diutan胶）对水性膨润土泥浆中黄原胶（XC）的影响的实验研究。在不含盐的水基膨润土泥浆和含氯化钠（NaCl）的水基膨润土泥浆中，对生物聚合物的不同组成进行了实验室实验。在25°C老化后，使用1100型粘度计测量由XC（2 Ibm）配制的水性膨润土泥和使用XC（1Ibm）和Diutan胶（1Ibm）制备的水性膨润土泥的流变性能。 ，100°C和120°C放置16小时。使用HTHP压滤机测量API流体损失和泥浆配方的滤饼。将仅含有XC的水性膨润土泥的性质与含有XC和丢丁胶的水性膨润土泥的性质进行了比较。目前的结果表明，在水基膨润土泥中以1：1的比例混合Diutan胶和黄原胶，可提高其在流体特性（表观粘度，凝胶强度，屈服点，YP / PV比，LSRV，ñ和ķ。流体配方还显示出有利的泥饼增稠特性。实验数据还表明，在25°C，100°C和120°C老化后，在存在diutan胶的情况下，含有DiC的含XC的水性膨润土泥浆，API流体损失值分别降低了16％，19％和34％。分别持续16小时。实验结果还表明，含有XC和Diutan胶的水基膨润土泥浆对地层的损害较小，并且对单价阳离子（Na ⁺）的污染具有耐受性。因此，黄原胶和地黄胶的协同作用可以改善水基钻井液的性能。