Application research on deep thin coal seam identification in Gujiatan Coal Mine based on post-stack wave impedance inversion technology

This paper introduces the principle of post-stack wave impedance inversion technology. Based on the sedimentary characteristics of the main coal seams in the Gujiatan Coal Mine, a corresponding geological model was established. Forward modeling was conducted using the acoustic wave equation, and the seismic time sections from the forward modeling showed that deep thin coal seams exhibit weak energy reflections, which is not conducive to detailed seismic interpretation. Post-stack wave impedance inversion technology was applied to test and analyze the forward modeling seismic data. The study indicates that this technology converts seismic data from amplitude information to wave impedance information using borehole logging data, highlighting the information of deep thin coal seams. This significantly enhances the identification capability of deep thin coal seams and effectively improves the accuracy of seismic interpretation for such seams. Additionally, the application of post-stack wave impedance inversion technology in the interpretation of actual 3D seismic data from the Gujiatan Coal Mine yielded favorable results, providing a reference for seismic exploration in surrounding areas or other similar regions.