METHOD OF SEISMIC PROSPECTING WITH USE OF ROCK HOLE CHARGES Russian patent published in 2004 - IPC

FIELD: geophysics, seismic methods of prospecting for mineral wealth with use of blasts of charges placed in rock holes in zone of little velocities.

SUBSTANCE: invention is intended to generate seismic sections of enhanced resolution and authenticity under complex seismological conditions, specifically, in large zone of little velocities (over 20-25 m). Method of seismic prospecting in regions with complex seismic and geological conditions includes excitation of seismic vibrations in hole, their recording on ground and processing of seismic data. Salient feature of method consists in excitation of seismic vibrations by execution of blasts of group of single radiators with high natural frequency of vibrations in point of each blast at same depth h. Each individual radiator comprises single charge located in hole. Mass of single charge and relation of hole radius to radius of single charge are selected on principle of single radiator. Inverse filtration with use of minimal phase deconvolution is carried out per each seismic recording while processing seismic data before summation. Thereafter zero-phase deconvolution and subsequent processing of seismic records in correspondence with seismic and geological conditions of examined region are performed.

EFFECT: generation of maximal resolution of seismic recording with high signal-to-noise ratio and provision for high efficiency with use of rock hole charges in seismic prospecting.