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机构地区:[1]深州地震台,河北深州053800 [2]兴济地震台,河北沧州061721
出 处:《防灾减灾学报》2017年第4期59-65,共7页Journal of Disaster Prevention And Reduction
摘 要:气压变化可引起井水位同步变化,这是水位观测的一种微动态,称为水位的气压效应,其量值用气压效率表示,即单位气压变化量引起井水位的变化量。2016年5月12日河北省多地普遍降温,降温幅度达5~11℃,降温的同时,气压大幅度上升,引起河北省地震地下流体观测井网多数井水位同步下降。利用这次气压快速上升及其相应的水位下降,计算了井网内12口观测井的气压效率。计算结果显示,多数井的气压效率与已有的研究结果基本相符,个别井孔的计算结果不符合井孔本身实际的气压效率。结果表明,应用气压扰动进行水位气压效率计算也是方法之一,但仅利用一次气压扰动,会造成计算结果的偶然性。Pressure change can cause changes of level, this is a micro dynamic water level observation is called water pressure effect, its value in barometric efficiency, namely content of quantity of unit pressure change caused the change of the level.In hebei province on May 12, 2016 more widespread cooling, cooling by 5~11 ℃, the cooling at the same time, the sharp rise in pressure, cause seismic subsurface fluid observation well network in hebei province level most synchronous decline.This paper, by using the pressure rising fast and corresponding water level drops, calculated the pattern within 12 observation Wells barometric efficiency.Calculation results show that most Wells barometric efficiency consistent with the existing research results, the calculation results of individual hole is not in conformity with the efficiency of the actual pressure hole itself.Results show that the application of air pressure disturbance on water efficiency calculation is one of the methods, but only use a pressure disturbance, the calculation results of contingency.
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