LOW-FREQUENCY TWO-COMPONENT BOTTOM SEISMIC CABLE Russian patent published in 2019 - IPC G01V1/16 G01V1/38 

FIELD: chemistry.

SUBSTANCE: invention relates to the seismic recording systems and can be used in the hydrocarbons search and exploration, as well as in the oil and gas fields monitoring. In particular, the technical solution relates to the two-component seismic systems based on the particles velocity vector vertical component and acoustic pressure in the seismic wave field simultaneous measurement. In addition, the technical solution relates to seabed cable seismic systems, also known as the “bottom cables”, which are connected to each other and to the seismic system central computer by cable, and placed on the seabed measuring modules. Two-component seabed seismic cable is a local digital network, which nodes are represented by at least digital recording modules and the central control computer, at that, each digital recording module has elongated in the direction along the cable shape and contains two orthogonally oriented in a plane perpendicular to the module axis the molecular electronic seismic sensors, hydrophone sensor and a sensor for the said seismic sensors sensitivity axes orientation determining relative to the gravitational acceleration vector, which outputs are connected to the microcontroller via ADC or digital inputs, based on the information from the sensors, calculating the oscillatory velocity vertical component and transmitting the calculations result and the hydrophone measurement data to the central control computer through the network switch.

EFFECT: technical result is increase in the obtained data information content due to ensuring of the two-component seismic data (pressure and vertical oscillatory velocity) multichannel recording, including, in the low-frequency region, during use on the seabed, when it is impossible to ensure control over the bottom seismic cables modules orientation.

6 cl, 3 dwg