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控制压力钻井气体溢流处理方法分析与改进
石油钻采工艺
2014年 36卷 第5期
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Title
Analysis and improvement of gas overflow treatment in managed pressure drilling
Authors
YAN Xiuliang
ZHU Huangang
LI Zongqing
CHEN Yongming
WANG Shujiang
单位
胜利石油工程有限公司钻井工艺研究院，山东东营 257017
Organization
Drilling Technology Research Institute, Shengli Petroleum Engineering Co., Ltd., Dongying 257017, China
摘要
控制压力钻井（MPD） 发生气体溢流后，如果处理不当有可能会造成进一步的溢流或者井漏，甚至会发展成为井喷。为解决以上问题，分析了控制压力钻井过程中影响井底压力稳定和井控安全的主要因素，给出了控制压力钻井最大允许气体溢流量的计算公式，并提出了一种控制压力钻井补液、排气新方法。通过数值模拟以及全尺寸井筒实验，证明了补液排气新方法的可行性，完善了控制压力钻井气体溢流的处理方法。
Abstract
In case of occurrence of gas overflow during managed pressure drilling, improper handling may lead to further overflow or lost circulation, or even blowout, so in order to solve the above problem, the main factors were analyzed which affected bottom hole pressure stability and well control safety during managed pressure drilling, and presented the calculation formula for maximum allowable gas flow volume during managed pressure drilling and also provides a new method for fluid supplementing and gas bleeding during managed pressure drilling. Numerical simulation and full-size wellbore experiment proves the feasibility of this new method, hence improving the handling method for managed pressure drilling gas flow.
关键词：
控制压力钻井;
气体溢流量;
补液排气法;
数值模拟;
全尺寸井筒;
Keywords:
managed pressure drilling;
gas overflow volume;
fluid supplementing and gas exhausting method;
numerical simulation;
full-size wellbore;
DOI
10.13639/j.odpt.2014.05.015
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