环空注气气举反循环钻井工艺及关键参数设计

doi:10.11885/j.issn.16745086.2021.04.29.01

西南石油大学学报(自然科学版) ›› 2021, Vol. 43 ›› Issue (4): 35-43.DOI: 10.11885/j.issn.16745086.2021.04.29.01

• 深层和非常规油气钻完井专刊 • 上一篇下一篇

环空注气气举反循环钻井工艺及关键参数设计

李黔¹, 张小林¹, 李郑涛², 李娟³, 代锋³

1. 西南石油大学石油与天然气工程学院, 四川成都 610500;
2. 四川中页利华新能源科技有限公司, 四川成都 610056;
3. 中国石油西南油气田公司四川长宁天然气开发有限责任公司, 四川成都 610000

收稿日期:2021-04-29 发布日期:2021-08-06
通讯作者: 张小林,E-mail:997642790@qq.com
作者简介:李黔,1962年生,男,汉族,四川南充人,教授,博士生导师,主要从事水平井钻井与完井技术、复杂深井超深井钻井技术、钻井信息智能化分析技术等方面的研究。E-mail:liqian@swpu.edu.cn
张小林,1989年生,男,汉族,四川内江人,博士研究生,主要从事气体钻井、控压钻井方面的研究。E-mail:997642790@qq.com
李郑涛,1986年生,男,汉族,四川遂宁人,工程师,主要从事水平井钻井方面的研究。E-mail:lizhengtao@petrochina.com.cn
李娟,1982年生,女,汉族,四川仁寿人,工程师,主要从事企业经济管理相关工作。E-mail:li_juan@petrochina.com.cn
代锋,1984年生,男,汉族,四川威远人,工程师,硕士,主要从事页岩气钻井相关技术和管理工作。E-mail:swpu_dai@163.com
基金资助:
国家重点研发计划变革性技术关键科学问题（2019YFA0708302）

Annular Aerated Gas-lift Reverse Circulation Drilling Technology and Key Parameters Design

LI Qian¹, ZHANG Xiaolin¹, LI Zhengtao², LI Juan³, DAI Feng³

1. Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Sichuan Zhongye Lihua New Energy Technology Co. Ltd., Chengdu, Sichuan 610056, China;
3. Sichuan Changning Natural Gas Development Co. Ltd., PetroChina Southwest Oil & Gas Field Company, Chengdu, Sichuan 610000, China

Received:2021-04-29 Published:2021-08-06

摘要/Abstract

摘要： 利用气举反循环钻井技术解决长宁页岩气表层钻井漏失问题，需要解决常规气举反循环钻井技术井口敞开、井底压力控制不精确等问题。为此，在常规气举反循环钻井技术的基础上，设计了一种环空注气气举反循环钻井新工艺，新工艺加装旋转防喷器、钻杆旋塞等工具，具备井控能力。通过调节注气量、钻井液排量等关键施工参数，控制井底压力，减少钻井漏失。在多相流理论基础上，建立了与新工艺匹配的环空注气气举反循环井底压力计算模型，分析了关键施工参数对井底压力的影响规律，建立了关键参数设计方法，在安全窗口范围内优选关键施工参数，保证安全钻井。结果表明：井底压力随注气量的增大先减小、后增大，存在临界注气量；井底压力随井深增大而增大；井底压力随钻井液排量增大而增大。在长宁某井表层进行了现场试验，与同井段井漏地层相比，较常规钻井工艺技术井漏减少83.6%。研究成果为解决四川长宁页岩气表层井漏问题提供了一种新的技术措施。

关键词: 气举, 反循环, 井漏, 多相流, 井控

Abstract: Using gas lift reverse circulation drilling technology to solve the leakage problem of Changning shale gas surface drilling, it is necessary to solve the problems of conventional gas lift reverse circulation drilling technology, such as open wellhead and inaccurate bottom hole pressure control. Therefore, on the basis of conventional gas-lift reverse circulation drilling technology, a new annular aerated gas-lift reverse circulation drilling technology is designed. The new technology is equipped with rotary blowout preventer, drill pipe cock and other tools, which has well control ability. By adjusting key construction parameters such as gas injection rate and drilling fluid displacement, bottom hole pressure is controlled to reduce drilling leakage. Based on the multiphase flow theory, the calculation model of bottom hole pressure for annular aerated gas-lift reverse circulation drilling technology is established. The influence of key construction parameters on bottom hole pressure is analyzed, and the design method of key parameters is established. The key construction parameters are optimized within the scope of safety window to ensure safe drilling. The results show that the bottom hole pressure first decreases and then rises with the increase of gas injection rate, and there is a critical gas injection rate; the bottom hole pressure rises with the increase of well depth; the bottom hole pressure rises with the increase of drilling fluid displacement. The field test was carried out in the surface drilling of a well in Changning. Compared with the lost circulation formation in the same section, the lost circulation was reduced by 83.6% using the conventional drilling technology. The research results provide a new technical measure to solve the problem of lost circulation in the surface drilling of Changning shale gas in Sichuan.

Key words: gas-lift, reverse circulation, lost circulation, multiphase flow, well control

中图分类号:

TE242

李黔, 张小林, 李郑涛, 李娟, 代锋. 环空注气气举反循环钻井工艺及关键参数设计[J]. 西南石油大学学报(自然科学版), 2021, 43(4): 35-43.

LI Qian, ZHANG Xiaolin, LI Zhengtao, LI Juan, DAI Feng. Annular Aerated Gas-lift Reverse Circulation Drilling Technology and Key Parameters Design[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(4): 35-43.

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环空注气气举反循环钻井工艺及关键参数设计

Annular Aerated Gas-lift Reverse Circulation Drilling Technology and Key Parameters Design

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