空气定向钻井设计计算方法

空气定向钻井设计计算方法

张雅春^1,2，刘强^2,3，向军文^2,3，隆东²

1.中国地质大学工程学院，武汉 430074;2.中国地质科学院勘探技术研究所，河北　廊坊 065000;3.中国地质大学工程技术学院，北京 100083

收稿日期:2008-06-03 修回日期:1900-01-01 出版日期:2009-03-26 发布日期:2009-03-26
通讯作者: 张雅春

Design Calculations for Air Directional Drilling

ZHANG Ya-chun^1,2,LIU Qiang^2,3,XIANG Jun-wen^2,3, LONG Dong²

1.School of Engineering, China University of Geosciences, Wuhan 430074, China;2.Institute of Exploration Techniques, Chinese Academy of Geological Sciences, Langfang, Hebei 065000, China;3.School of Engineering and Technology, China University of Geosciences, Beijing 100083, China

Received:2008-06-03 Revised:1900-01-01 Online:2009-03-26 Published:2009-03-26
Contact: ZHANG Ya-chun

摘要/Abstract

摘要： 根据空气定向钻井特点，将井段按直井段、造斜段及水平段3部分进行分析，详细介绍空气定向钻井设计和计算方法。为更好地应用到工程中，对理论计算注气量进行了流速修正法、地层因素法、井斜经验法和实验修正法4种修正方法的对比。结果表明：综合诸多因素，认为采用实验修正法更具安全性及可靠性。根据干空气或湿空气钻进计算方法确定出携岩“关键点”，即变截面处。如果存在多个变截面，选择动能最小点作为计算的“关键点”，算出满足“关键点”单位体积最小动能（149.806 J/m³）对应的注气量，然后采用本文的实验修正法得到的注气量，即将理论计算的井底压力扩大1.7倍以后对应的注气量作为实际注气量。

关键词: 空气定向钻井, 注气量修正方法, 钻井

Abstract: The well was analyzed by dividing it into the vertical portion, build-up portion and horizontal portion according to the air directional drilling characteristics. The design and method of air directional drilling were introduced. The theoretical air injection volumes at four correction methods were compared for better application of this technology. The results showed that the experimental correction method was the safest and most reliable method by taking into account of various factors, namely, the air injection volume where the theoretical down hole pressure was increased to 1.7 times was taken as the actual injection volume.

Key words: air directional drilling, correction method for air injection volume, drilling

中图分类号:

P634.2

张雅春，刘强，向军文，隆东. 空气定向钻井设计计算方法[J]. J4, 2009, 39(2): 294-0299.

ZHANG Ya-chun,LIU Qiang,XIANG Jun-wen, LONG Dong. Design Calculations for Air Directional Drilling[J]. J4, 2009, 39(2): 294-0299.

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