Abstract

Finite-difference analyses is attempted to simulate a multi layered complex coal seam model in order to differentiate top and bottom of thin coal seam. Field data from the Australian region is utilized to generate a simplified model and generate synthetic seismic data for different source receiver configurations. The results reveal that seismic modelling with high frequency source (1000Hz) is feasible in delineating the top and bottom of thin coal layers for closer source and receiver configurations. The behavior of seismic amplitude could help in the detection of a sequence of thin coal layers. Amplitude versus Offset (AVO) analysis for transverse isotropic coal seam model shows negative anomaly for coal layers with considerable variation in reflection coefficient for different configurations. Interference of thin coal layers seems to diminish the reflectivity of the interfaces. We may conclude that