The application of reservoir prediction method based on seismic low frequency properties in Xishanyao Formation in SN58 well area

Abstract

In order to eliminate the shielding effect of the coal seam on the sand body, better predict the sand body, comprehensively apply the seismic forward modeling method and frequency division technology to extract the low frequency signal in the suitable frequency range, the seismic information of the coal seam can be filtered out, and the sand body is retained. There is a school signal, and then according to the matching relationship between the low frequency signal and the sand body, the distribution range of the sand body can be well predicted, and then the seismic inversion method and the logging data of the new drilling are used to verify whether the sand body distribution is reasonable. The results show that the sand body interpretation conclusion of single well logging data has a good correspondence with the sand body distribution range predicted by reservoir prediction based on seismic low frequency properties. In the absence of well data to participate in the calculation, the reservoir prediction method based on the low-frequency properties of the earthquake can directly reflect the distribution range of the sand body, and the reliability of the predicted sand body boundary range is higher.