中国石油大学学报（自然科学版）2017，Vol.41Issue(6)：94-100,7.DOI:10.3969/j.issn.1673-5005.2017.06.011
基于随钻电阻率响应特征的深水钻井气侵早期监测方法
Early gas kick detection based on the LWD resistivity in deepwater drilling
摘要
Abstract
When applying LWD resistivity for deepwater gas kick detection, it is not clear and difficult to identify the re-sponse characters of the LWD resistivity. In this research, a simulated wellbore was built in laboratory to study gas kicks dur-ing drilling, and to analyze the response characters of the LWD resistivity under different gas kick rates. A method of early gas kick detection was developed based on the LWD resistivity and drilling fluid log data with considerations of eliminating effects of rock formation. Based on the experimental results, a model correlating the dimensionless resistivity and kicked gas volume was formulated, and the impulse character of instantaneous LWD resistivity was used to identify the flow pattern of multiphase flow in wellbore. The results show that the average error between the experimental data and that predicted by the model is less than 5%. With application of this method for the detection of typical gas kicks in deepwater well, it is 10 mi-nutes earlier than the conventional method of mud pit gain, and 6 minutes earlier than the method of early gas kick detection via bottom riser. The method of the LWD resistivity can detect a gas kick occurring in the wellbore earlier than the conven-tional overflow detection technique, which can provide useful data for the as kick control.关键词
气侵早期监测/随钻电阻率/试验井筒/响应特征/气侵程度Key words
early gas kick detection/LWD resistivity/experimental wellbore/response characteristics/gas kick degree分类
能源科技引用本文复制引用
王金波,孙宝江,李昊,王宁,王志远,高永海..基于随钻电阻率响应特征的深水钻井气侵早期监测方法[J].中国石油大学学报（自然科学版）,2017,41(6):94-100,7.基金项目
国家"973"计划项目(2015CB251200) （2015CB251200）
教育部长江学者和创新团队发展计划项目(IRT1086) （IRT1086）
国家科技重大专项(2016ZX05028-001-003) （2016ZX05028-001-003）
