Abstract

In the area of thrust folded belt like Himalayan Foothills, model based seismic data acquisition is required to ensure the reflection from key portion of the structures. Ray trace modeling study is carried out to design acquisition parameters for 2-D seismic survey in Nahan-Paonta Sahib area in Himalayan Foothills. Synthetic field data (shot gathers) are simulated using common source geometry with several combinations of acquisition parameters over the velocity depth model derived from the interpreted time horizons in the area. These data are processed and analyzed further for getting better continuity of events below the thrust fault. Group interval, shot interval, far offset and spread configuration are analyzed for better time domain mapping as well as depth domain imaging. symmetrical split spread configuration with group interval 20m is giving best result yet asymmetrical split spread configuration may also be considered for seismic data acquisition. Far offset of the order of 1.5 to 2.0 times the target depth is reasonable for velocity analysis required for depth imaging.