Geophone array vs single sensor field data case study in Pannonian Basin

Summary Aim of the research was to examine influence of single sensor interval and application of single sensor vs geophone array on 2D seismic data quality. Seismic data were acquired at two 2D lines with different sensor configuration. Line 1 was acquired with single sensor on 25m separation between sensors and with geophone linear array. Line 2 was acquired with single sensor at 12,5m spacing from which we obtained two data sets: with 12,5m single sensor spacing and with 25m single sensor spacing. All data sets were processed in a same way, with optimal parameters for each data set. Geophone array is giving us better coherency of reflections on stack section, leading to more geological details we can interpret. With geophone array ground roll is suppressed on later times, giving us better resolution and higher dominant frequencies in deeper parts. With 12,5 m useful signal is better preserved and it’s not spatial aliased. Ground roll is more efficiently removed on 12,5 m interval then on 25 m. Recommendation for future surveys with single sensor is to further decrease interval between sensors. This will also lead to better removal of ground roll and preserve more geological information for structural and quantitative interpretation.