石油学报 ›› 2016, Vol. 37 ›› Issue (8): 1053-1060.DOI: 10.7623/syxb201608012

• 石油工程 • 上一篇    下一篇

连续油管带筛管侧钻多分支井双重环空携岩能力实验

韩树, 李根生, 黄中伟, 田守嶒, 宋先知, 杨睿月   

  1. 中国石油大学石油工程学院 油气资源与探测国家重点实验室 北京 102249
  • 收稿日期:2015-12-10 修回日期:2016-06-02 出版日期:2016-08-25 发布日期:2016-09-02
  • 通讯作者: 李根生,男,1961年9月生,1983年获华东石油学院钻井工程专业学士学位,1988年获石油大学(北京)油气井工程专业博士学位,现为中国石油大学(北京)教授、博士生导师,主要从事油气钻井和完井工程方面的研究。Email:ligs@cup.edu.cn
  • 作者简介:韩树,男,1993年1月生,2015年获中国石油大学(北京)石油工程专业学士学位,现为中国石油大学(北京)硕士研究生,主要从事油气井工程方面的研究。Email:zhongshiyouhanshu@163.com
  • 基金资助:

    国家重大科技专项(2011ZX05037-001)资助。

Experiments on cuttings transport efficiency in dual annulus with Slotted Liner Sheathing Coiled Tubing in jetting multi-branch well

Han Shu, Li Gensheng, Huang Zhongwei, Tian Shouceng, Song Xianzhi, Yang Ruiyue   

  1. State Key Laboratory of Petroleum Resource & Prospecting, China University of Petroleum, Beijing 102249, China
  • Received:2015-12-10 Revised:2016-06-02 Online:2016-08-25 Published:2016-09-02

摘要:

连续油管带筛管喷射侧钻多分支井钻完井一体化技术具有快速、高效、低成本钻完井的特点,可实现一趟管柱同时完成连续油管喷射钻井和割缝筛管完井。为研究该技术所特有的连续油管外套割缝筛管的双重管柱对岩屑运移的影响,实验研究了不同筛管割缝参数和钻井条件下环空内岩屑床高度、岩屑体积分数及携岩率的分布规律。分析结果表明,与单一连续油管环空相比,连续油管带筛管喷射侧钻分支井双重钻柱环空具有过流面积小、环空局部流速高的特点,在较高的机械钻速下仍能保证良好的井眼净化能力,岩屑运移效率可提升56.94%~72.28%;随着排量增大,携岩效果提升最明显;为增强双重管柱的携岩能力,宜选取短缝长、窄缝宽、低缝密和高缝单元中缝数的筛管。

关键词: 连续油管, 筛管, 双重环空, 岩屑运移, 实验研究

Abstract:

Slotted Liner Sheathing Coiled Tubing (SLSCT) used for jetting drilling multi-branch well, can synchronize the jet drilling and liner running in one trip, so as to achieve rapid and efficient drilling and completion with low cost. To study the influences of SLSCT dual-pipes in this technology on cuttings transport, a series of laboratory experiments were conducted to investigate the height of cuttings bed, cuttings volume fraction and cuttings transport efficiency distribution laws under different slotted liner parameters and drilling conditions. The analysis indicated that compared with traditional coiled-tubing annulus, SLSCT was characterized by small flow area and high local flow rate of annulus, which can guarantee favorable wellbore cleaning efficiency under high ROP conditions, thus leading to a 56.94%~72.28% increase in cuttings transport efficiency. With the increase of pumping rate, cuttings transport effect improves most significantly. To enhance the cuttings transport efficiency of dual-pipes, slotted liner should be selected with short slot length, narrower slot width, low slot density and higher slot concentration.

Key words: coiled tubing, slotted liner, dual annulus, cuttings transport, experimental research

中图分类号: