원유회수증진을 위한 microseismic monitoring 기법 연구

초록

In this study, a module, which can detect the location of the microseismic from the recorded seismogram, was developed by improving Simulps 14 program used in earthquake seismology. The use of the difference between P and S first arrivals provides the more exact locations than P first arrival only. In addition, the results of examining the sensitivity to the errors in the velocity model used in estimating the locations, show that about 10% error in the velocity model was not significantly affected in the calculation of the location for the model used in this paper. On the other hand, the algorithm which can obtain the moment magnitude and the source parameters of microseism by spectral analysis in frequency domain was developed. Finally, the direction and the aperture of the fractures can be revealed by describing the locations and the magnitudes of microseismics in three dimensions.

키워드