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为分析大长径比管道内气体爆炸事故的原因,以新疆克拉玛依油田克浅10井区“8·7”23123井口爆炸事故为例,进行物理爆炸和化学爆炸的理论计算,并分析井口爆炸事故过程。物理爆炸计算与分析表明,爆炸可产生的压力为18.46MPa,小于采油(气)井口装置105MPa的爆破压力,因此,该爆炸不属于蒸汽过热引起的物理爆炸。化学爆炸计算表明,油管内发生化学爆炸产生的高温达到2666.7℃,可以使钢材强度受到破坏;化学爆炸的爆轰压力为122.4MPa,大于井口装置能承受的爆破压力,说明是化学爆炸产生的爆轰压力摧毁了井口装置。计算与分析的结果可以为防止类似事故的发生提供参考。
In order to analyze the reason of gas explosion in pipelines with large aspect ratio, taking the “8 · 7 ” 23123 wellhead explosion accident in Kela 10 oilfield of Karamay Oilfield in Xinjiang as an example, the theoretical calculation of physical explosion and chemical explosion was carried out and the wellhead Explosion accident process. The calculation and analysis of physical explosion show that the pressure generated by the explosion is 18.46 MPa, which is less than the burst pressure of 105 MPa for the wellhead of the production (gas) well. Therefore, the explosion is not a physical explosion caused by steam overheating. The calculation of chemical explosion shows that the high temperature produced by the chemical explosion in the oil pipe reaches 2666.7 ℃, which can damage the strength of steel. The detonation pressure of chemical explosion is 122.4MPa, which is greater than the burst pressure that the wellhead can withstand, indicating that the explosion caused by chemical explosion The boom pressure destroyed the well head unit. The results of calculation and analysis can provide reference for preventing the occurrence of similar accidents.