工程工艺

小井眼提速技术在页岩油开发中的应用

  • 谢鑫 ,
  • 窦正道 ,
  • 杨小敏 ,
  • 金晶 ,
  • 王媛媛 ,
  • 任飞
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  • 中国石化江苏油田分公司石油工程技术研究院,江苏 扬州225009
谢鑫(1984—),硕士,副研究员,从事钻井工程设计和技术研究工作。地址:江苏省扬州市中国石化江苏油田分公司石油工程技术研究院钻井室,邮政编码:225009。E-mail:xiexin.jsyt@sinopec.com

收稿日期: 2022-09-19

  网络出版日期: 2023-01-30

基金资助

中国石化江苏油田分公司科研项目“江苏探区页岩油钻井压裂关键技术研究”(JS21024)

ROP enhancement technique for slimhole drilling in shale oil development

  • Xin XIE ,
  • Zhengdao DOU ,
  • Xiaomin YANG ,
  • Jing JIN ,
  • Yuanyuan WANG ,
  • Fei REN
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  • Petroleum Engineering Technology Research Institute, Sinopec Jiangsu Oilfield, Yangzhou, Jiangsu 225009, China

Received date: 2022-09-19

  Online published: 2023-01-30

摘要

中国石化江苏油田页岩油开发,面临着投资高、产量低的问题。油田开发已近45年,废弃老井数量多,利用老井眼侧钻的方式开发页岩油能降低钻井成本。2022年在花庄地区开展利用老井侧钻水平井,采用小井眼钻井方式的探索。针对小井眼钻具柔性大、轨迹控制难、钻速慢、间隙小、环空压耗大、固井质量差、井控风险高等难题,探索大套管开窗、井眼轨迹优化、高效钻头+螺杆+LWD地质导向钻井、泡沫固井、油基钻井液堵漏、窄间隙井控等技术,形成页岩油井小井眼高效钻井技术体系。应用表明:苏北盆地花庄地区H2CHF井实钻机械钻速最快达5.0 m/h,与邻井常规井眼钻速相当,比实施新井方案钻井投资降低50 %,节约投资1 500万元,为页岩油低成本开发提供了重要思路。

本文引用格式

谢鑫 , 窦正道 , 杨小敏 , 金晶 , 王媛媛 , 任飞 . 小井眼提速技术在页岩油开发中的应用[J]. 油气藏评价与开发, 2023 , 13(1) : 83 -90 . DOI: 10.13809/j.cnki.cn32-1825/te.2023.01.009

Abstract

The shale oil development in Sinopec Jiangsu Oilfield is facing the problems of high investment and low production. After 45 years of development, there are a lot of abandoned old wells. Developing shale oil by old borehole side drilling can reduce drilling costs. In 2022, the sidetracking slimhole horizontal drilling in old wells is carried out in Huangzhuang. The slimhole drilling tools have the problems of large flexibility, difficult track control, slow drilling speed, small clearance, large air pressure consumption, poor cementing quality and high well control risk. In order to solve these problems, a system of efficient sidetracking slimhole horizontal drilling technology system is formed by the applications of large casing windowing, well track optimizations, high-efficiency drill bit+screw+LWD geosteering drilling, foam cementing, oil-based drilling fluid plugging, narrow gap well controlling, small hole coring, etc. A test application in H2CHF well shows that the actual drilling speed is up to 5.0 m/h, which is equivalent to the conventional drilling speed in adjacent wells, and the total drilling cost is reduced by 50 %, saved by 15 million. The new development and test would provide important ideas and reference for future development of shale oil in Jiangsu Oilfield.

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