中国石油大学学报（自然科学版）2025，Vol.49Issue(6)：97-106,10.DOI:10.3969/j.issn.1673-5005.2025.06.009
超分子凝胶封堵剂及其封堵机制
Supramolecular gel plugging agent and its plugging mechanism
摘要
Abstract
In order to solve the problem of working fluid loss during oil and gas drilling and production,a supramolecular gel plugging agent based on hydrophobic association was prepared by micellar copolymerization method,which can be used to plug fractures and pores in the formation during oil and gas drilling and production.The plugging agent was formed by free radical polymerization of acrylamide,octadecyl methacrylate,sodium dodecyl sulfate and other monomers.According to the requirements of plugging materials during oil and gas drilling and production,the forming time,rheology,swelling property,mechanical properties and plugging properties of supramolecular gels were evaluated in laboratory.The results show that the forming time of supramolecular gel plugging agent is controllable,and it has excellent viscoelastic recovery ability within a certain range of shear strain and scanning frequency.The compressive stress reaches 1.43 MPa when the compression amount is close to 87%.Meanwhile,supramolecular gel shows good swelling performance,and its swelling process is non-fickian diffusion type.Besides water molecular diffusion,the swelling process is greatly affected by gel network and polymer chain relaxation,interaction between water molecules and polymer network and polymer network groups,etc.In addition,supra-molecular gel presents strong formation bonding ability,good plugging performance,and the plugging rate is greater than 95%.It can effectively reduce lost circulation and improve the plugging effect,and is suitable for long-term plugging of het-erogeneous and malignant lost circulation layers.关键词
超分子凝胶/封堵剂/流变性能/溶胀性能/封堵效果Key words
supramolecular gel/plugging agent/rheological property/swelling property/plugging effect分类
能源科技引用本文复制引用
杨景斌,白英睿,孙金声,吕开河,刘凡,朱跃成..超分子凝胶封堵剂及其封堵机制[J].中国石油大学学报（自然科学版）,2025,49(6):97-106,10.基金项目
国家资助博士后研究人员计划(GZC20251950) （GZC20251950）
国家自然科学基金基础科学中心项目(52288101) （52288101）
国家自然科学基金面上项目(52374023,52074327) （52374023,52074327）
山东省泰山学者青年专家支持项目(tsqn202306117) （tsqn202306117）
