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地震前后油井动态的异常变化是指油井观测系统内油、气、水动态偏离其长期平均状态的变化。这种变化的起因源于地震活动(孕震、发震及震后地应力调整)。一切非震因素引起的油井动态变化统称为干扰,这些要予以排除。研究地震引起的油井动态变化,特别是地震前油井动态的变化的目的,主要在于提取前兆信息,以便预报未来地震时、空、强三要素,同时还在于提取震源信息,积累有关地震孕育过程的科学资料。油井观测系统包括观测层位、井孔、仪器,它与地下水观测系统的区别在于前者的观测层是承压圈闭的油、气、水层,
The abnormal change of oil well before and after an earthquake refers to the change of the dynamic deviation of oil, gas and water in the oil well observation system from its long-term average state. The causes of this change stem from the seismic activity (seismogenic, seismogenic and post-earthquake stress adjustment). All non-seismic factors caused by the dynamic changes in oil wells collectively referred to as interference, which should be ruled out. The purpose of studying the dynamic changes of oil wells caused by earthquakes, especially the changes of oil wells before earthquakes is to abstract the precursory information so as to forecast the elements of the earthquakes, space and force in the future and also to extract the information of the earthquakes and accumulate the relevant information Scientific information. The well observation system consists of observation beds, boreholes and instruments. The difference between this observation system and the groundwater observation system is that the observation layer of the former is a confined trapped oil, gas and water layer,