Simultaneous vibroseis 3D seismic data recording for optimum field development-HFVS 3D seismic data acquisition and processing

This case study presents a simultaneous vibroseis data recording and processing techniques for optimum field development in Libya. In order to acquire high trace density and high resolution 3D seismic data, the first High Fidelity Vibratory Seismic (HFVSSM) survey carried out in Libya in 2008. HFVS is an Exxon Mobil patented method that has been licensed by a number of contractors which technique allows data from multiple vibratory sources to be simultaneously recorded during the acquisition phase and separated in the processing stage. Besides the HFVS method requires one or more individual vibrators comprise a vibrator set and the recording of vibrator motion signals on each vibrator for every sweep that these actual motion signals can be used to process the data. The HFVS point source/receiver recording technique is providing high productivity and high resolution data. Processing records as unique source points allows for correction of intra array statics and differential velocity move-out which would not be possible with conventional recording where vibrator arrays are summed in the field. Measured vibrators ground force signals are used for the data inversion and separation provide more reliable data. Additionally, denser 3D geometry leads to finer spatial sampling to avoid aliasing problem and increase resolution. HFVS 3D data recording is different than conventional.