钻井液与完井液2025，Vol.42Issue(4)：486-493,8.DOI:10.12358/j.issn.1001-5620.2025.04.007
基于疏水缔合作用的凝胶封堵剂及封堵机制研究
Study on Gel Plugging Agent and Plugging Mechanism Based on Hydrophobic Association
摘要
Abstract
lost circulation has long been a major challenge affecting the safety and efficiency of drilling operations.In this study,a gel plugging agent(LAS)was synthesized via free radical polymerization using lauryl methacrylate(LMA)as the hydrophobic monomer and acrylamide(AM),2-acrylamido-2-methylpropanesulfonic acid(AMPS),and acrylic acid(AA)as hydrophilic monomers.The mechanical properties of the gel were enhanced by the coordination interaction between Al3+metal ions and carboxyl groups on the polymer molecular chains.The results demonstrated that the LAS gel exhibited re-crosslinkable characteristics,along with excellent plugging performance and self-adaptive properties under high-temperature and high-pressure conditions.Under conditions of 120℃and 6 MPa pressure,the leakage volumes of 2%LAS gel for simulated fracture sand beds with particle sizes of 20-40 mesh,40-60 mesh,and 60-80 mesh were 69.5 mL,58.3 mL,and 41 mL,respectively.This plugging performance significantly surpassed that of conventional gels and traditional plugging agents.Additionally,the LAS gel demonstrated superior swelling and rheological properties across varying temperatures and salinity levels.It could form a stable plugging layer under formation temperature activation,effectively reducing leakage volume.The dynamic re-crosslinking capability of the LAS gel ensured robust plugging effects even in extreme high-temperature and high-pressure environments,highlighting its potential for application in workflow leakage control.关键词
封堵材料/凝胶/动态可逆键/疏水缔合/可再交联Key words
Lost circulation materials/Gels/Dynamic reversible bond/Hydrophobic association/Re-crosslinking分类
能源科技引用本文复制引用
李文哲,黄桃,唐宜家,王锐,夏连彬,汪瑶..基于疏水缔合作用的凝胶封堵剂及封堵机制研究[J].钻井液与完井液,2025,42(4):486-493,8.基金项目
中国石油西南油气田分公司科技攻关项目"深层页岩气防漏堵漏及提高地层承压能力技术研究"(XNS工程院JS2023-137). （XNS工程院JS2023-137）
