Statistics and analysis on causes for well blowout accident

摘要

According to operating procedures, accident levels, and accident causes, this article summarized and analyzed 134 well blowout accidents occurring at home and abroad during 1970-2013. According to frequency of blowout causes, it calculated the contribution rate of different blowout causes using support percentage of correlation analysis methods and compared the importance of various blowout causes. It indicated that well blowout occurred more frequently during drilling operation; once well blowout occurred in offshore platforms, the proportion of serious environmental pollution and casualties was higher than onshore, due to the special environment nature in offshore operations; the contribution rates of management fault and equipment defect were highest for different blowout causes. Based on the contribution rate of blowout causes, it proposed some targeted countermeasures to prevent well blowout. Complying with significance rank of accident prevention could reduce well blowout.