重庆开县天然气井喷事故与现今地应力环境变化的思考

A CONSIDERATION ON ACCIDENT OF GAS HOLE BLOW AND CHANGE OF PRESENT CRUSTAL STRESS BACKGROUNDS AT KAIXIAN COUNTY,CHONGQING

位于重庆市开县高桥镇罗家16H天然气井和罗家2天然气井分别于2003年12月23日和2006年3月25日发生特大天然气井喷和渗漏事故。2次事故除与人为因素有关外,是否有地质原因,值得深思。讨论了三峡水库蓄水可能引起的局部现今水动力学环境和地应力环境变化,提出了预防天然气井喷事故再次发生的建议。

The Three Gorges Project is famous in the world. The water head reached 135m above sea level on June 10, 2003, and the impounding water height is about 50m. The water head arrived at 156m on Oct. 27, 2006, and the total impounding water height is about 71m. In 2009, the water head will get to 175m with a total impounding water height of about 90m. The two gas wells, Luojia 16H well and Luojia 2 well, which belong＇to the China Oil and Gas Cooperation at Gaoqiaozheng of Kaixian county in Chongqing Municipality, triggered off two terrible gas hole blow accidents separately on Dec. 23, 2003 and on Mar. 25, 2006, and made a large loss. Apart from the factors with people＇s operation, the two accidents make us think whether they are also related to geological conditions. This paper generally discusses the changing of local present hydrodynamics and geostress backgrounds caused by the Three Gorges reservoir impounding water, and suggestions are also given to prevent the third gas hole blow accident happening again.