文獻(xiàn)名：Minimizing the filtration loss of water-based drilling fluid with sustainable basil seed powder

作者： Hanyi Zhong^ab， Xin Gao^ab， Xianbin Zhang^c， Anliang Chen^c， Zhengsong Qiu^ab， Xiangzheng Kong^ab， Weian Huang^ab

^a Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China), Ministry of Education, Qingdao, 266580, China

^b School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, China

^c Drilling Fluid Technology Services of CNPC BoHai Drilling Engineering Company Limited, Dagang, Tianjin, 300280, China

摘要：Filtration control is important to ensure safe and high efficient drilling. The aim of the current research is to explore the feasibility of using basil seed powders (BSPs) to reduce filtration loss in water-based drilling fluid. The effect of BSP concentration, thermal aging temperature, inorganic salts (NaCl and CaCl₂) on the filtration properties of bentonite/basil suspensions was investigated. The filtration control mechanism of BSP was probed via water absorbency test, zeta potential measurement, particle size distribution measurement, and filter cake morphologies observation by scanning electron microscope. The incorporation of BSPs into the bentonite suspension generated acceptable rheology below 1.0 w/v%. The BSPs exhibited effective filtration control after thermal aging at 120 °C, but less efficiency at 150 °C. After thermal aging at 120 °C, the bentonite suspension containing 1.0 w/v% BSPs could resist NaCl and CaCl₂ pollution of 5.0 w/v% and 0.3 w/v% respectively. Besides general filtration control behaviors, the exceptional water retaining capability formed by numerous nanoscale 3D networks in the basil seed gum and considerable insoluble small particles in BSPs might further contribute to the filtration control. The excellent filtration properties bring basil seed a suitable and green candidate for the establishment of high-performance drilling fluids.

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