自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
英文版编委
自然科学版 英文版
英文版首届青年编委

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第47卷    第9期    总第265期    2016年9月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2016)09-3101-07
双子型VES清洁泡沫压裂液稳泡性能
吕其超1,李兆敏1,李宾飞1,李松岩1,卢拥军2,邱晓慧2,张昀1

(1. 中国石油大学(华东) 石油工程学院,山东 青岛,266580;
2. 中国石油勘探开发研究院 廊坊分院,河北 廊坊,065007
)

摘 要: 针对双子型黏弹性表面活性剂(VES)泡沫压裂液不同于常规泡沫压裂液的稳泡机理,采用微观气体扩散测定、低温冷冻电镜透射、界面流变测试、微观可视化等研究手段,对排液速度、液膜强度、气体扩散速度等进行测试分析。研究结果表明:VES泡沫压裂液的液相中形成互相缠绕的蠕虫状胶束,减缓液膜排液速度,促使泡沫析液半衰期相对单一表面活性剂泡沫延长2~3个数量级;VES泡沫气液界面上吸附达到饱和状态的表面活性剂分子以及体相中互相缠绕的蠕虫状胶束抑制了气体扩散作用;VES泡沫液膜具有较高的界面扩张黏弹模量,这有助于增强气泡抵抗变形及自我修复的能力,进而提高泡沫适应压力波动的能力。这些特性使双子型VES清洁泡沫压裂液具有比常规泡沫压裂液更良好稳泡性能。

 

关键词: 双子型VES;泡沫;压裂液;稳泡性

Foam stability of Gemini-VES clean foam fracturing fluid
Lü Qichao1, LI Zhaomin1, LI Binfei1, LI Songyan1, LU Yongjun2, QIU Xiaohui2, ZHANG Yun1

1. School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China;
2. Langfang Branch, Petrochina Research Institute of Petroleum Exploration and Development, Langfang 065007, China

Abstract:To study the foam stability mechanism of Gemini-VES (viscoelastic surfactant) foam fracturing fluid that is different from the conventional foam fracturing fluid. Micro gas diffusion measuring device, cryo-transmission electron microscope, interfacial rheological test, microscopic visualization were used to measure and analyze the drainage speed of liquid through film between bubbles, mechanical strength of foam film and the rate of N2 gas diffusion through foam film. The results show that there are entangled worm-like micelles in VES foam fracturing fluid which can slow the rate of liquid drainage and extend the foam drainage half-life 2-3 orders of magnitude. Surfactant molecules which have reached saturated adsorption quantity in the interface and entangled worm-like micelles in body phase block gas diffusion channel together. In addition, high viscoelastic modulus of VES foam film enhances self-repair ability and deformation resistance of bubbles, thus, enhances the adaptability of foam to the pressure fluctuation. With these characters Gemini-VES clean foam fracturing fluid has better foam stability than conventional foam fracturing fluid.

 

Key words: Gemini-VES; foam; fracturing fluid; foam stability

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号