COAL ENGINEERING ›› 2013, Vol. 45 ›› Issue (12): 81-83.doi: doi:10.11799/ce201312029

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Seismic restraint inversion method to predict the strata pressure

  

  • Received:2013-06-12 Revised:2013-08-27 Online:2013-12-10 Published:2013-12-10

Abstract:

According to the prediction theory of strata pressure and Fillippone formula, the relationship of phase velocity and strata pressure is analyzed statistically with empirical data, which is used to improve the Fillippone formula. Then using well logging restraint inversion to obtain the phase velocity to predict the strata pressure of the exploration area. The results show that the relationship of phase velocity and strata pressure is accorded with the index, which is above 0.8. The well logging restraint inversion method is combined well logging data with seismic data, so that the phase velocity is closer to the real geological conditions. The predicted strata pressure not only reflects close relationship with depth in general, but also reflects some changes in the local by geological factors such as tectonism. Compared to the traditional method based on the strata pressure gradient, this method has higher accuracy, which error is less than 5%.

Key words: strata pressure, interval velocity, Fillippone formula, well logging restraint inversion, water disaster prevention