Application of Psyllium Husk as a Friendly Filtrate Reducer for High-Temperature Water-Based Drilling Fluids.
Application of Psyllium Husk as a Friendly Filtrate Reducer for High-Temperature Water-Based Drilling Fluids.
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DOI：
10.1021/acsomega.1c04999
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发表时间：
2022-08-16
期刊：
影响因子：
4.1
通讯作者：
Cui, Lifeng
中科院分区：
文献类型：
--
作者：
Chen, Xiaodong;Gao, Xin;Chen, Junyu;Liu, Yunfeng;Song, Chunyu;Liu, Wenlei;Wan, Yuan;Kong, Xiangzheng;Guan, Ying;Qiu, Zhengsong;Zhong, Hanyi;Yang, Jinghua;Cui, Lifeng
针对传统水基钻井液处理剂环保与高温降滤失性能难以平衡的挑战，我们研究将车前子壳作为耐高温环保降滤失剂添加到水基钻井液中。对车前子壳的成分、理化性质和微观结构进行了表征。然后评价不同温度热轧后车前子壳对膨润土基浆料流变性能和滤失性能的影响。结果表明，膨润土基浆液中添加洋车前子壳可有效改善膨润土基浆液的流变性能和滤失性能，耐温可达160℃。 160℃热轧后，添加1w/v%车前子壳可使膨润土基浆料的API降滤失量和高温高压降滤失量分别降低76.04%和56.91%，表现出优异的高温降滤失性能。车前子壳的支链结构和糖醛酸可以在一定程度上抑制其自身分子结构的降解，这也是车前子壳在高温下仍具有优异的降滤失性能的根本原因。洋车前子壳有望替代部分传统合成聚合物，用于环保耐高温水基钻井液。
Aiming at the challenge that environmental protection and high-temperature fluid loss reduction performance of the traditional water-based drilling fluid treatment agent are difficult to balance, our studies added psyllium husk as a high-temperature-resistant and environmentally friendly filtrate reducer to a water-based drilling fluid. The composition, physical and chemical properties, and microstructure of psyllium husk are characterized. Then, the effects of psyllium husk after hot rolling at different temperatures on the rheological properties and fluid loss properties of bentonite-based slurry are evaluated. The results show that the psyllium husk added to the bentonite-based slurry can effectively improve the rheological properties and fluid loss properties of the bentonite-based slurry, and the temperature resistance can reach 160 °C. After hot rolling at 160 °C, adding 1 w/v % psyllium husk can reduce the API fluid loss and high-temperature and high-pressure fluid loss of the bentonite-based slurry by 76.04 and 56.91%, respectively, showing excellent fluid loss reduction performance at high temperatures. The branched structure and uronic acid of psyllium husk can inhibit the degradation of its own molecular structure to a certain extent, which is the fundamental reason why psyllium husk still has excellent fluid loss reduction performance at high temperatures. Psyllium husk is expected to replace some traditional synthetic polymers and be used in environmentally friendly high-temperature-resistant water-based drilling fluids.
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