Comparative study on the structures and properties of organo-montmorillonite and organo-palygorskite in oil-based drilling fluids

作者：Zhuang, Guanzheng; Zhang, Zepeng^*; Jaber, Maguy^*; Gao, Jiahua; Peng, Shanmao

来源：Journal of Industrial and Engineering Chemistry, 2017, 56: 248-257.

DOI：10.1016/j.jiec.2017.07.017

• Organoclay
• Oil-based drilling fluids
• Thermal stability
• Rheological properties
• Exfoliation

This work aims to reveal the differences of structures and properties between organo-montmorillonite (OMt) and organo-palygorskite (Opal) in oil-based drilling fluids. Organoclays are prepared in aqueous solution and characterized by XRD, SEM and TEM. Surfactants can intercalate into the interlayer space, of Mt while they coat only on the,palygorskite surface. OMt can form "house of cards" structure while OPal forms "haystack" structure. Temperature rising promotes network structure and rheological properties of organoclays in oil. The decline of rheological properties at high temperature is mainly caused by the dissolution of surfactants into oil, instead of thermal decomposition.

• 出版日期2017-12-25
• 单位中国地质大学（北京）