稠油乳化黏度测量曲线与乳液特性的关系
Relationship between viscosity measurement curve and emulsion characteristics of heavy oil
马涛 1伦增珉 1葛巧玉 1许关利1
作者信息
- 1. 中国石化石油勘探开发研究院,北京 100083;国家能源陆相砂岩老油田持续开采研发中心,北京 100083
- 折叠
摘要
稠油化学驱过程中降黏剂浓度对稠油乳化影响明显,通过测量不同浓度降黏剂的稠油乳状液黏度-时间曲线,以黏度、降黏率为指标分析了黏度曲线与乳液特性的关系.结果表明,当降黏剂的浓度远大于临界乳化浓度时,形成稳定O/W乳状液,黏度低、降黏率大于95%.当降黏剂的浓度大于临界乳化浓度时,形成O/W乳状液,而后随着表面活性剂向油相的迁移,油滴聚并、分层.当降黏剂的浓度与临界乳化浓度相当时,乳状液油O/W转化为W/O,黏度大幅度提高.当降黏剂的浓度小于临界乳化浓度时,只能形成W/O乳状液.
Abstract
During chemical flooding of heavy oil,the viscosity reducing agent concentration has obvious in-fluence on the emulsification of heavy oil.The viscosity and viscosity reduction rate are used as indica-tors.By measuring the viscosity time curve of heavy oil emulsion with different viscosity reducing agent concentration,the relationship between viscosity curve and emulsion characteristics was analyzed.The re-sult showed that when the concentration of viscosity reducer is much larger than the critical emulsion con-centration,a stable O/W emulsion is formed with low viscosity and viscosity reduction rate greater than 95%.When the concentration of viscosity reducing agent is greater than the critical emulsion concentra-tion,O/W emulsion is formed,and then with the migration of surfactant to oil phase,oil droplets coalesce and stratify.When the concentration of viscosity reducer is equal to the critical emulsion concentration,the emulsion oil O/W is converted to W/O,and the viscosity is greatly improved.When the concentration of viscosity reducer is less than the critical emulsion concentration,only W/O emulsion can be formed.
关键词
稠油/乳化/黏度/降黏率/乳状液类型Key words
heavy oil/emulsify/viscosity/viscosity reduction/type of emulsion引用本文复制引用
基金项目
国家自然科学基金企业创新发展联合基金(U20B6003)
国家重点研发计划(2018YFA0702400)
出版年
2024
NETL
NSTL
万方数据