西南石油大学学报（自然科学版）2025，Vol.47Issue(4)：1-9,9.DOI:10.11885/j.issn.1674-5086.2024.07.03.02
钻井液用高吸水性树脂的防漏堵漏性能研究
Research on High Water Absorbent Resin for Leak Prevention and Sealing in Water-based Drilling Fluid
摘要
Abstract
To address the problem of wellbore leakage caused by clay particles and natural fractures in shale oil and gas reser-voirs using water-based drilling fluids,which cannot be successfully plugged,acrylic acid and polyvinyl alcohol are used as monomers,N,N'-methylene bisacrylamide is used as a chemical crosslinking agent,and the response surface method is adopted with water absorption rate as the response target.The experimental factors are optimized,and a PAA/PVA interpen-etrating network structure high water absorbent resin plugging agent is prepared through free radical solution polymerization.The successful synthesis and thermal stability of the plugging agent were verified by infrared,thermogravimetric,and scanning electron microscopy analysis.Evaluate the pressure sealing performance of the plugging agent through sealing and pressure bearing capacity experiments,sand bed experiments,and micro crack simulation experiments.The test results show that the plugging agent has good thermal stability.Under the conditions of a fracture width of 2 mm,a temperature of 180 ℃,a plug-ging agent dosage of 3％,and a confining pressure of 10 MPa,the maximum pressure bearing capacity is 6.08 MPa,and the high-temperature and high-pressure filtration loss is 9 mL.It can achieve the plugging effect of water-based drilling fluid in shale formations.关键词
页岩/堵漏/高吸水性树脂/响应曲面法/吸水倍率Key words
shale/plugging/high water absorbent resin/response surface methodology/water absorption rate分类
能源科技引用本文复制引用
罗平亚,代锋,刘应民,贺佳宁,白杨..钻井液用高吸水性树脂的防漏堵漏性能研究[J].西南石油大学学报（自然科学版）,2025,47(4):1-9,9.基金项目
国家自然科学基金(52274008,U23A2026) （52274008,U23A2026）
国家重点研发计划(2019YFA0708303) （2019YFA0708303）
中国石油-西南石油大学创新联合体科技合作项目(2020CX040102,2020CX040201) （2020CX040102,2020CX040201）
