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首页> 外文期刊>Journal of Applied Polymer Science >Cationic starch derivatives as reactive shale inhibitors for water-based drilling fluids
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Cationic starch derivatives as reactive shale inhibitors for water-based drilling fluids

机译：阳离子淀粉衍生物作为用于水性钻井液的活性页岩抑制剂

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摘要

One of the major problems associated with the use of water-based drilling fluids is the interaction of water with specific rock formations, such as shales, and the consequent swelling of reactive clays that may be present in that type of rock. Several types of clays reactivity inhibitors have been used by the oil industry, and the most effective ones are the cationic polyelectrolytes, such as the poly(diallyldimethylammonium chloride) (PDADMAC). However, this polyelectrolyte is very toxic. In this work, a series of cationic starch derivatives with different cationic degrees were synthesized with the objective of evaluating their potential as environmentally correct shale reactivity inhibitors. The results showed that the synthesized derivatives presented a good capacity of adsorption on bentonite and an efficient inhibition of the shale reactivity. The derivative with an intermediate cationic degree presented the best performance. In the tests with the formulated fluids this derivative provided an intact cuttings recovery of 84.8% and a total recovery of 92.3%. These values are very close to those found for the PDADMAC additive, therefore indicating that this cationic starch derivative presents a good potential as inhibitor of the shale reactivity. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46621.
机译：与使用水基钻井液相关的主要问题之一是水与特定岩层（例如Shales）的相互作用，以及可在该类型岩石中存在的反应性粘土的随之膨胀。石油工业使用了几种类型的粘土反应性抑制剂，最有效的是阳离子聚电解质，例如聚（二烯丙基甲基氯化铵）（PDADMAC）。然而，该聚电解质非常有毒。在这项工作中，通过阳离子度的一系列阳离子淀粉衍生物合成，目的是评估其潜在的环境正确的页岩反应性抑制剂。结果表明，合成衍生物对膨润土的吸附良好，有效抑制页岩反应性。具有中间阳离子度的衍生物呈现了最佳性能。在配制的流体的试验中，该衍生物提供完整的切割恢复84.8％，总回收率为92.3％。这些值非常靠近发现PDADMAC添加剂的那些，因此表明该阳离子淀粉衍生物具有良好的潜在作为页岩反应性的抑制剂。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46621。

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