2006年12月21日晚7点钟,宣汉县中国石化清溪1井发生天然气控制性溢流事件,强劲的气流从4700多米深的地下蹿出,发出山呼海啸般的声响。这起涉及宣汉县革命老区人民的安危,引起党和国家领导人关注、牵动全社会的宣汉县清溪1井天然气溢流已于 At 7 o’clock on the night of December 21, 2006, a controlled natural gas overflow occurred at Qingxi-1 well of Sinopec County, Xuanhan County. A strong air flow emerged from the underground of more than 4,700 meters and sent out a tsunami-like sound. This involved the safety of the people in the old revolutionary base areas of Xuanhan County and caused the natural gas overflow of Cheonggye-1 well in Xuanhan County that has drawn the attention of the party and state leaders and affected the whole society.