引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览次   下载 本文二维码信息
码上扫一扫!
分享到: 微信 更多
煤层低伤害氮气泡沫压裂液研究
李兆敏,吕其超,李松岩,李宾飞,孙乾
(中国石油大学石油工程学院,山东青岛 266580)
摘要:
随着煤层气开发规模不断扩大,在煤层压裂增产过程中压裂液滤失量高、地层伤害严重、返排困难且压裂效果差等问题不断凸显。结合煤层气储层物性,研制低伤害氮气泡沫压裂液体系,即0.5%YSJ杀菌剂+1%FP-1复合起泡剂+2%KCl防膨剂+N2。对该氮气泡沫压裂液体系进行滤失试验和分散试验研究。结果表明:该泡沫压裂液体系起泡及稳泡性能良好,耐剪切能力强,携砂能力强;泡沫和气液两相滤饼的封堵作用可以明显降低压裂液的滤失量,并且氮气可以增强压裂液的返排能力;压裂液体系中的表面活性剂可以降低煤粉与水相的界面张力,提高压裂液对煤粉的分散能力;相对于常规压裂液体系,氮气泡沫压裂液体系对煤层气岩心的伤害较小。
关键词:  煤层气  氮气泡沫  压裂液  动态滤失  低伤害
DOI:10.3969/j.issn.1673-5005.2013.05.015
分类号:TE 357 〖HTH〗
基金项目:国家科技重大专项课题(2011ZX05051);国家“863”高技术研究发展计划(2013AA061400)
A nitrogen foam fluid with low formation damage for CBM fracturing treatment
LI Zhao-min, L Qi-chao, LI Song-yan, LI Bin-fei, SUN Qian
(School of Petroleum Engineering in China University of Petroleum, Qingdao 266580, China)
Abstract:
Fracturing treatment is essential for the development of coalbed methane(CBM) fields. In the fracturing of coal seams, high filtration loss, serious formation damage, low flow-back and poor efficiency were the main problems when using conventional water-based fracturing fluids. A nitrogen foam fracturing fluid system with low formation damage was developed based on the geological features of CBM reservoirs. The formula of the foam fluid mainly includes a bactericidal agent, foaming surfactants and clay stabilizers. Filtration loss, dispersion, and microscopic foaming experiments were conducted for testing the capacities of the fluid system as a foaming and fracturing fluid. Experimental results show that the fracturing fluid has a good foaming ability and foam stability, excellent shearing bearing ability, strong sand carrying capacity. The plugging effect of foam can significantly reduce the filtration loss, and nitrogen can improve the flow back ability of the fracturing fluid. The surfactants in the fracturing fluid can also reduce the interfacial tension between coal and water, thus improving the dispersion of coal powders in the fluid. In comparison with conventional fracturing fluids, the nitrogen foam fracturing fluid can cause much less formation damage to the CBM reservoir.
Key words:  coalbed methane(CBM)  nitrogen foam  fracturing fluid  dynamic filtration loss  low formation damage
版权所有 中国石油大学学报(自然科学版)编辑部 Copyright©2008 All Rights Reserved
主管单位:中华人民共和国教育部 主办单位:中国石油大学(华东)
地址: 青岛市黄岛区长江西路66号中国石油大学期刊社 邮编:266580 电话:0532-86983553 E-mail: journal@upc.edu.cn
本系统由:北京勤云科技发展有限公司设计