Abstract

Onshore seismic data acquisition with explosive as source is usually carried out by placing charge at Optimum depth (OD) selected based on the up-hole data. In most cases, this is the key to get good quality seismic data. In areas where decisive ODs could not be fixed effectively with the uphole information, it is found that close monitoring of daily production data and planning of test shots prior to actual data recording helps tremendously in getting good quality data. In the present study, the seismic data quality was severely affected by a sandy paleo- channel with rapid variations of the thickness & lithology of the weathering layer.