ANALYSIS OF THE DYNAMIC ANOMALY OF OIL AND GAS OF THE DEEP OIL WELLS

In this paper, the relation between the earthquake activity and the Variation of the dynamic anomaly of the oil and gas in three deep oil wells in Tanggu, Tianjin has been studied;the geological structure location of the three wells (Tang-11, Tang-12 and Tang-18) in Tanggu, the dynamic varition of the oil and gas in the wells and the observational instruments and methods are presented;the relation between the activity of some strong aftershockes and the spilled oil amount, the escaped gas amount from well Tang-18 and the dynamic variation of pressure at the mouth of The walls Tang-11 and Tang-12 during the years from 1980 to 1984 are analyzed.The results show that the variation amplitude of the dynamic anomaly of the oil and gas in deep wells is rather large and the duration of anomaly is short.lt belongs to the type of short-imminent earthquake precursor.Finally, the mechanism of dynamic variation of the oil and gas in deep well is discussed.