Abstract

In a land seismic survey, blasting of explosive source in a proper shooting medium is of utmost importance. This requires drilling of shot holes of proper depths so that the explosive can be placed in an optimum medium to result in good quality seismic data. Areas which pose problem in drilling of shot holes, the placement of explosive at optimal depth becomes unachievable ( with the drilling technology being used in respective survey) and resultant data quality gets adversely affected both in terms of signal stand out and frequency content. Certain areas exhibit poor reflected energy due to excessive absorption in the near surface. Suchareas warrant alternative ways to endeavorminimization of adverse effect on data quality, at both source and receiver ends.