用于增强聚合物和粘土在聚合物水基钻井液中的流变行为的低共熔溶剂,Energy & Fuels

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用于增强聚合物和粘土在聚合物水基钻井液中的流变行为的低共熔溶剂
Energy & Fuels ( IF 5.2 ) Pub Date : 2023-02-25 , DOI: 10.1021/acs.energyfuels.2c04327
Jingyuan Ma ₁ , Shaocong Pang _{2,

3} , Yuxiu An _{2,

3}

Affiliation

水平井、大斜度井等带有“切割床”的钻井作业要求钻井液具有高悬浮性、粘度不高。迫切需要能够提高聚合物钻井液流变性能的非增粘流变改性剂。本研究报告了基于氯化胆碱的低共熔溶剂 (Gly-DES) 作为聚合物水基钻井液流变改性剂的应用。通过高温流变测试、流变模型拟合、流变参数（屈服点、流动指数、凝胶强度等）分析，评价了Gly-DES对膨润土/聚合物流体的流变作用。结果表明，在 150 °C 温度范围内，2-4 wt% Gly-DES 可以改善聚合物钻井液的流变性能。Gly-DES的加入显着改善了钻井液的屈服点、凝胶强度、低剪切粘度等流变参数，同时钻井液的粘度在不同温度下始终保持稳定，这意味着Gly-DES 可以在不显着增加钻井液粘度的情况下帮助提高钻井液的悬浮和切削携带能力。机理分析表明，Gly-DES通过氢键和离子键与聚合物和膨润土连接，增强了聚合物在高温下的交联网络结构，促进了Na膨润土悬浮液中弱凝胶的形成。Gly-DES 可以同时增强流变性，抑制粘土水化，

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Deep Eutectic Solvents for Enhancing the Rheological Behavior of Polymers and Clays in Polymeric Water-Based Drilling Fluids

Drilling fluids with high suspending capacity without high viscosity are required in drilling operations, such as horizontal wells and highly deviated wells, with the “cutting bed”. Non-viscosifying rheological modifiers that can enhance the rheological properties of polymer drilling fluids are urgently needed. This study reports the application of a choline-chloride-based deep eutectic solvent (Gly-DES) as a rheological modifier for polymeric water-based drilling fluids. The rheological effects of Gly-DES on bentonite/polymer fluids were evaluated by high-temperature rheological testing, rheological model fitting, and rheological parameter (yield point, fluidity index, gel strength, etc.) analysis. The results showed that 2–4 wt % Gly-DES can improve the rheological properties of polymer drilling fluid in the temperature range of 150 °C. The addition of Gly-DES significantly improved the rheological parameters of drilling fluids, such as the yield point, gel strength, low shear rate viscosity, etc. At the same time, the viscosity of drilling fluids was always stable at different temperatures, which means that Gly-DES can help improve the suspension and cutting carrying capacity of drilling fluids without significantly increasing the viscosity of drilling fluids. Mechanistic analysis revealed that Gly-DES was connected to the polymer and bentonite through hydrogen bonds and ionic bonds, which enhanced the cross-linked network structure of the polymer at high temperatures and promoted the formation of weak gels in Na bentonite suspensions. Gly-DES can simultaneously enhance rheology, inhibit clay hydration, and improve filter cake lubricity and has the potential to be a multifunctional drilling fluid treatment agent.

更新日期：2023-02-25

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