石油化工2024，Vol.53Issue(3)：383-390,8.DOI:10.3969/j.issn.1000-8144.2024.03.011
稠油火驱油藏封堵气窜用腐殖酸钠冻胶的研制
Development of a sodium humate gel for sealing gas channeling in fireflooded heavy oil reservoirs
摘要
Abstract
Sodium humate was used as gelling agent to prepare gel.The stability of sodium humate gel under the conditions of high temperature,high pressure,and the presence of flue gas was investigated.The variation law of gel strength during high-temperature heat treatment was analyzed through rheological experiments.The sealing ability of the gel was evaluated via physical simulation testing.The form of the gel was observed by Cryo-SEM,and the feasibility of using sodium humate gel for sealing gas channeling during fireflooding was discussed.The experimental results showed that by using sodium humate as gelling agent and adjusting the gelation time by selecting the catalyst,the temperature-resistant gel suitable for different temperature conditions such as 120,150,180℃can be formed.Meanwhile,the gelation time can be adjusted from 10 h to 75 h,and the dehydration rate is lower than 20%after heat treatment for 90 d.The gel exhibits good stability under high temperature,high pressure,and the presence of O2 and CO2.The breakthrough pressure gradient of the gel formed by 10%(w)sodium humate and 1.2%(w)water-soluble phenolic resin can reach 3.95 MPa/m in 0.94 μm2 sandpacks,showing a strong sealing ability.关键词
火驱/封堵气窜/冻胶/腐殖酸钠/稠油热采Key words
fireflood/sealing gas channeling/gel/sodium humate/heavy oil thermal recovery分类
能源科技引用本文复制引用
王美洁,刘明嘉,苏日古,刘人杰,陈伟雄,葛际江..稠油火驱油藏封堵气窜用腐殖酸钠冻胶的研制[J].石油化工,2024,53(3):383-390,8.基金项目
中国石油重大科技项目(ZD2019-183-007). （ZD2019-183-007）
