石油学报 ›› 2008, Vol. 29 ›› Issue (5): 757-760,765.DOI: 10.7623/syxb200805023

• 石油工程 • 上一篇    下一篇

自适应防漏堵漏钻井液技术研究

吕开河1, 邱正松1, 魏慧明2, 李先锋2, 宋元森2   

  1. 1. 中国石油大学石油工程学院, 山东东营, 257061;
    2. 辽河石油勘探局钻井一公司, 辽宁盘锦, 841400
  • 收稿日期:2007-11-24 修回日期:2008-02-21 出版日期:2008-09-25 发布日期:2010-05-21
  • 作者简介:吕开河,男,1970年12月生,2007年获中国石油大学(华东)油气井工程专业博十学位,现为中国石油大学(华东)副教授,主要从事井壁稳定、油气层保护及油田化学剂开发方面的研究工作.E-mail:lvkaihe@vip.sina.com
  • 基金资助:
    国家“十五”科技项目(2002BA312B);中国石油天然气集团公司重点科技攻关项目(06B2010203)联合资助

Study on techniques of auto-adapting lost circulation resistance and control for drilling fluid

LÜ Kaihe1, QIU Zhengsong1, WEI Huiming2, LI Xianfeng2, SONG Yuansen2   

  1. 1. College of Petroleum Engineering, China University of Petroleum, Dongying 257061, China;
    2. First Drilling Company of Liaohe Petroleum Exploration Bureau, Panjin 841400, China
  • Received:2007-11-24 Revised:2008-02-21 Online:2008-09-25 Published:2010-05-21

摘要: 针对钻井液漏失地层非均质性强及漏失通道尺寸难以准确预知等问题,提出了自适应防漏堵漏钻井液技术。该技术无须明确预知漏失地层孔喉直径,能自适应封堵岩石表面较大范围的孔喉,对较宽孔径分布的漏层具有很好的封堵作用,封堵速度快,封堵层浅,适合于油层防漏、堵漏。室内评价表明,自适应防漏堵漏钻井液能在一定范围内对不同孔径分布的漏层产生良好的封堵作用。封堵率达到90%以上,封堵带压力强度大于9MPa,封堵厚度小于1cm,切片后渗透率恢复率达90%以上。现场应用证明,自适应防漏堵漏钻井液能有效提高地层的承压能力,并且有良好的防漏及堵漏效果。

关键词: 自适应防漏堵漏技术, 钻井液, 封堵效果, 渗透率, 封堵层, 现场应用

Abstract: Lost circulation of drilling fluid is ubiquity in the drilled formation with severe heterogeneity,wide distribution of pore radius and unpredictability of pore radius.A kind of drilling fluid for auto-adapting lost circulation resistance and control was developed,which can rapidly generate thin and tight plugged zones in the drilled formation with wide distribution of pore radius.The laboratory evaluation shows that the auto-adapting drilling fluid system has the auto-adapting sealing effect,and the sealing ratio is over 90%.The pressure strength of sealing belt is above 9 MPa,and the sealing thickness is less than 1 cm.The restored permeability in core achieves above 90%.Field application shows that the auto-adapting drilling fluid for lost circulation resistance and control can effectively increase the pressure-bearing capacity of the formation.The effect of lost circulation resistance and control for drilling fluid is good.

Key words: auto-adapting lost circulation resistance and control technique, drilling fluid, plugging effect, permeability, plugged player, field application

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