关键词: 井喷, 应力, 地震

Abstract: The new No.5 well is a petroleum well with 2260m depth, and it spewed nine times from 1978 to 2004. During a blowout, a lot of natural gas with a little of oil and oil wax were spewed together with underground water; the tiptop height of water column was more than 10m. Based on the statistics, the blowout phenomenon of well did not have obvious cycle characteristics.Based on the analysis of earthquake cases, the authors selected the earthquakes that occurred in the half year after the No.5 well had spewed to study the relation between earthquake and blowout of well. The result shows that the corresponding rate for M5 earthquake is 33.3% in the range of 100km, 0 for M5 earthquake in a range of 100km to 300km, 0 for M6 earthquake in the range of 500km, and 60% for large earthquake or strong earthquake swarm in the range of 1000km.The probable reason was explained. Finally, the authors raised their standpoint about earthquake tendency concerning the blowout of No.33 well in Wusu and the new No.5 well again in 2005.

Key words: blowout, stress, earthquake