石油化工高等学校学报2011，Vol.24Issue(5)：56-59,63,5.DOI:10.3696/j.issn.1006-396X.2011.05.015
酸性堵水剂DQ-3的实验研究
Experiment Study on Acidic Plugging Agent DQ-3
王玉功 1任雁鹏 2李勇 1朱家杰2
作者信息
- 1. 川庆钻探钻采工程技术研究院,陕西西安 710018
- 2. 低渗透油气田勘探开发国家工程实验室,陕西西安 710018
- 折叠
摘要
Abstract
Based on the acidizing principle of variable-viscosity acid, a acid blocking agent (DQ-3) was prepared with acid densifier as major raw materials, and with crosslinker and inhibitor as additives, to achieve combination of near-wellbore unblocking and far-wellbore blocking. The formula of acid blocking agent (DQ-3) is optimized :10% HC1, 0. 7% densifier, 0.4% crosslinker and 0.05% inhibitor. Various performances of DQ-3 were evaluated by gel test (bottle test method) and core flow test. The results show that when residual acid concentration of DQ-3 system was less than 0. 1% (pH = 2 - 3) , gel is formed under system reaction, and viscosity is more than 100 000 mPa · s; DQ-3 system can resist temperature of 40~90 ℃ , and is insensitive to salinity (abovelO g/L); the core water blocking rate of DQ-3 is over 95%, whereas oil blocking rate is below 45%.关键词
酸性堵水剂/凝胶/封堵性/长庆油田Key words
Acidic plugging agent/ Gel/ Plugging performance/ Changqing oil fields分类
能源科技引用本文复制引用
王玉功,任雁鹏,李勇,朱家杰..酸性堵水剂DQ-3的实验研究[J].石油化工高等学校学报,2011,24(5):56-59,63,5.
