油水井异常变化机理与天然地震前兆

The mechanism of anomaly produced fluid of well and warning signs of earthquake

济阳坳陷惠民凹陷中央断裂带的油水井产液异常是天然地震前兆。地震的孕育过程是区域地应力场变化的过程 ,导致地下储集层孔隙流体压力变化 ,使油层与井孔间的压差增大 ,造成井孔中流体的流速、流量异常变化 ,并使地下流体的溶解度变化 ,引起其物理和化学性质的变化。图 3参

It is the earthquake warning signs of that the produced fluid of well in Huimin Sag come forth anomaly. The gestate process of earthquake is the variational process of regional terrestrial stress. It causes the change of pore fluid press. It augments diffrential pressure. It also changes the velocity and quantity of flow in wells. It varies the solubility of underground liquid, the physical and chemical property of underground fluid also changed.