MODE OF BOREHOLE SEISMIC EXPLORATION Russian patent published in 2007 - IPC G01V1/40 

FIELD: the invention refers to seismic exploration and may be used for receiving speedy characteristics of the upper part of the section- the zone of small velocities and also for studying geological structure and physical properties of the zone of small velocities.

SUBSTANCE: in the process of boring elastic vibrations are excited by way of impacting of a rock destructing instrument of a mobile rig on the researched environment. Simultaneously elastic vibrations are registered with a sensor of a reference signal consisting of four transformers, evenly distributed along the perimeter of the site of the rig frame, and ground receiving arrangement. The ground receiving arrangement is installed on the day surface at a distance from the wellhead of no less then 5-10 meters on the rods sunken into the ground to the depth exceeding the power of the soil layer. The range of the working frequencies from 100Hz to 350Hz in whose limits useful signals are picked out. Mutually correlated functions are formed and according to them seismic velocities and position of seismic frontiers are defined.

EFFECT: increases accuracy and trustworthiness of construction of speedy characteristics of the researched environment.