中国石油大学学报（自然科学版）2017，Vol.41Issue(6)：132-139,8.DOI:10.3969/j.issn.1673-5005.2017.06.016
基于核磁共振T2分布的自生气可膨胀泡沫冻胶调堵机制
Mechanism of profile control and water shutoff for authigenic gas expandable foam gel based on NMR T2 distribution
摘要
Abstract
Large-dose and multi-slug plugging method or filling artificial barrier have been widely used to control water coning in active edge and bottom water reservoirs, which will cause the large consumption of plugging agent and high cost. In order to solve this problem, the authigenic gas foam gel plugging system was developed. By means of orthogonal experiments, the optimal formula was selected using gel strength, gel time, and gel volume as evaluation indexes and the influencing factors were analyzed as well. The results show that the authigenic gas foam gel plugging system has the advantages of high volume expansion and outstanding plugging performance, which can achieve the purpose of controlling water invasion, sealing and channeling. The performance of this system is optimum at the temperature of 60 ℃ and pH of 6. 5-7. 4. The gel time is 28 hours while the gel strength is G grade, whose volume expansion is more than 300%. The injected foam gel is able to allevi-ate the core heterogeneity difference by plugging the large holes in core. And the characteristic of the authigenic foam gel can be regulated by changing the value of pH to meet the requirements of placing different plugging agents on different locations.关键词
泡沫冻胶/自生气/体膨型堵剂/调堵机制/核磁共振Key words
foam gel/authigenic gas/swellable-plugging agent/mechanism of profile control and water shutoff/nuclear magnetic resonance ( NMR)分类
能源科技引用本文复制引用
齐宁,陈国彬,李柏杨,汪洋,梁冲,高梦斐,董长银,林远平..基于核磁共振T2分布的自生气可膨胀泡沫冻胶调堵机制[J].中国石油大学学报（自然科学版）,2017,41(6):132-139,8.基金项目
"十三五"国家科技重大专项(2017ZX005030005) （2017ZX005030005）
