低温环境下油气井用导爆索拒爆原因初探

Preliminary Study of Misfire Detonation Based on Detonating Cord

通过对低温环境下油气井用导爆索拒爆问题进行分析,确定了可能影响油气井用导爆索拒爆的三个因素,并逐一对其进行了分析和验证,同时模拟射孔作业中油气井用导爆索的高低温环境,并在该环境下对油气井用导爆索进行了起爆性能验证试验。通过对实验数据分析和油气井用导爆索起爆机理研究表明,油气井用导爆索质量符合标准要求,温度对于油气井用导爆索爆炸化学反应有直接影响;提高反应温度有利于反应物加大反应速率,降低起爆能量壁垒;对接方式的输出能量明显优于搭接方式,保证磁电雷管与油气井用导爆索的对接深度,有利于油气井用导爆索的正常起爆。最后确定了不同的连接方式和环境温度是导致油气井用导爆索拒爆的主要因素。

Through analyzing the misfire detonation problems to oil & gas Wells with low temperature environment,three factors affecting oil and gas wells with detonating cord misfire are identified,and the analysis and validation has been conducted one by one,and meanwhile,the perforating operation in oil and gas wells with detonating cord high and low temperature environment is simulated,and verification test is performed under the environment of oil and gas wells with detonating cord detonation. By analyzing the experimental data and researching on initiation mechanism of detonating cord in oil and gas well,it shows that detonating cord quality conforms to the requirements of the standards,temperature has a direct effect to chemical reaction of the oil and gas wells' detonating cord explosion. Improving the reaction temperature is beneficial to increase the reaction rate of reactants,reduce blasting energy barriers,and output energy with docking way of lap is obviously better than tower model,to ensure docking depth from the magnetoelectric detonator with the oil and gas wells' detonating cord,which is advantageous to normal initiation of detonating cord. Finally,it is identified the different connection mode and the environment temperature is the main factor for miss-fire of oil and gas wells' detonating cord.