Qt based software development of reverse time migration for walkaway VSP seismic data

The geophones in VSP geometry are located down in the borehole, therefore VSP seismic data has high S/N and with rich wavefield information. Based on two-way acoustic wave raypath, the prestack reverse time migration (RTM) has high precision for imaging, and provides important data for the study of complex subsurface structure near the borehole and fluid properties in targeted formation. According to the algorithm of reverse time migration for walkaway VSP seismic data, the complete RTM processing flow of VSP data was designed and the VSP RTM software was preliminarily developed, which is developed by Qt language as well as in Linux operating system. Two types of core algorithm systems, CPU and GPU can be installed in different hardware. The test of model data demonstrated that the developed software is characterized by easy operating, good transferring and high imaging precision.