You Fuchang, Wu Yu, Gong Xingguang, Zheng Yancheng
College of Chemistry & Environmental Engineering, Yangtze University, Jingzhou 434023, China.
School of Petroleum Engineering, National Engineering Research Center for Oil & Gas Drilling and Completion Technology, Yangtze University, Wuhan 430100, China.
Polymers (Basel). 2025 Mar 12;17(6):751. doi: 10.3390/polym17060751.
Water-based drilling fluids (WBDFs) cannot be effectively applied in long horizontal wells, such as shale gas wells, due to their high coefficient of friction (COF) and filtration loss that can strongly limit the efficient and environmentally friendly development of oil and gas resources. The objective of this study is the formulation of a WBDF characterized by ultra-low friction and ultra-low filtration properties, with a high-concentration polyepoxysuccinic acid (PESA) solution being utilized in the continuous phase. The research aims at the exploration of the feasibility of the method, the validation of the results, and the elucidation of the underlying mechanisms. The experimental results confirmed that the proposed WBDFs have excellent rheological properties, a COF of 0.016 and an API filtration of 0.4 mL. Microscopic analysis confirmed a direct and positive correlation between the macroscopic properties of the drilling fluids and their adsorption behavior at high PESA concentrations. This approach can be used to redesign traditional WBDFs and provide new possibilities to realize super performance in WBDFs that can be used to replace oil-based drilling fluids.
由于水基钻井液（WBDFs）的高摩擦系数（COF）和滤失量，它们无法有效地应用于长水平井，如页岩气井，这会严重限制油气资源的高效和环境友好型开发。本研究的目的是配制一种具有超低摩擦和超低滤失性能的水基钻井液，在连续相中使用高浓度的聚环氧琥珀酸（PESA）溶液。该研究旨在探索该方法的可行性、验证结果并阐明潜在机制。实验结果证实，所提出的水基钻井液具有优异的流变性能，摩擦系数为0.016，API滤失量为0.4 mL。微观分析证实了钻井液宏观性能与其在高PESA浓度下的吸附行为之间存在直接的正相关。这种方法可用于重新设计传统的水基钻井液，并为实现可用于替代油基钻井液的高性能水基钻井液提供新的可能性。
