Amphoteric Polymer as an Anti-calcium Contamination Fluid-Loss Additive in Water-Based Drilling Fluids
Amphoteric Polymer as an Anti-calcium Contamination Fluid-Loss Additive in Water-Based Drilling Fluids
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两性聚合物作为水基钻井液中的抗钙污染降滤失添加剂
DOI：
10.1021/acs.energyfuels.6b01567
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发表时间：
2016-09-01
期刊：
影响因子：
5.3
通讯作者：
Wang, Jinxi
中科院分区：
文献类型：
--
作者：
Liu, Fan;Jiang, Guancheng;Wang, Jinxi
水基钻井液中的钙离子污染会显著增加滤失量，破坏流变性，特别是在高温井眼中。研究了2种丙烯酰胺聚合物作为WBD防钙降滤失剂的性能，包括由2-丙烯酰胺-2-甲基丙磺酸（AMPS）、丙烯酰胺（AM）和二甲基二烯丙基氯化铵（DMDAAC）合成的两性聚合物（ADD）和由AMPS和AM合成的阴离子聚合物（AD）。在11.1%CaCl2污染和150 °C热轧条件下，钠基膨润土（Na-BT）基泥浆的透射电子显微镜（TEM）中，在ADD和Na-BT层之间观察到典型的“星形网状”结构;然而，聚合物AD不能形成这种网状结构。Na-BT层的能量色散谱（EDS）分析表明，与AD相比，ADD可以大大减少Na-BT层上的Ca 2+的量。因此，在美国石油协会（API）的一份文件中，
Calcium ion contamination in water-based drilling fluids (WBDs) dramatically increases filtration volume loss and worsens rheological properties, especially in high-temperature bore holes. This study demonstrated two types of acrylamide polymers as anti-calcium contamination fluid-loss additives in WBDs, including an amphoteric polymer (ADD) synthesized by 2-acrylamide-2-methylpropanesulfonic acid (AMPS), acrylamide (AM), and diallyl dimethylammonium chloride (DMDAAC) and an anionic polymer (AD) synthesized by AMPS and AM. In transmission electron microscopy (TEM) of sodium bentonite (Na-BT)-based mud under 11.1% CaCl2 contamination and 150 °C hot rolling, a typical “star-net” structure was observed between the ADD and Na-BT layers; however, polymer AD could not form such a net structure. Energy-dispersive spectrometry (EDS) analysis of the Na-BT layer indicated that ADD could greatly decrease the amount of Ca2+ on Na-BT layers in comparison to AD. Accordingly, in an American Petroleum Institute (API) fil...