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Complex composition

• Digital seismic multimodule downhole sonde, which consists of identical downhole receiver modules, which are connected between each other by cable seals, retranslator modules and GR module.
• Set of surface equipment, in composition of which are included computer of NOTEBOOK type, software- controlled power supply unit and interface unit, which contains skids, providing digital telemetry connection with downhole sonde, coupling with seismic excitations synchronization system and surface control signals registration.
• Technological software, which provides automatic testing of the whole complex, control of all technological processes during operation performance, preprocessing performance and received data quality control, operator report maintenance and documentation.

Advantages:

• possibility of increasing the number of receiver modules in sonde and their interchangeability;
• possibility of operation with any type of logging cable, including one-core cable;
• the absence of industrial network disturbances, ultra-low level of proper instrumental noises, which allows to register weak seismic signals and use non-explosive seismic sources during operation with not high energy;
• the presence in receiver modules of software controlled calibrators, which allows to provide metrology characteristics control as electronic measurement channels, and seismic receivers straight in downhole conditions;
• small sizes and receiver modules mass, and also the use of software controlled powerful electromechanical hold-down, which provide minimum influence of “apparatus – well wall” resonance system, and also wave interferences (mud wave, cable wave) on registered seismic vibrations;
• technological software usability and universality make it possible to use it in a different modifications of the borehole seismology.

Equipment can operate with different systems of seismic excitation synchronization such as SSB-1, SSB-2, GSP, SGS- S, SGD, WSI, Pelton and others.