The present invention discloses a near-sea-bottom hydrate detection system, which includes a ship-borne part and a deep-towing part. The ship-borne part includes: a comprehensive monitoring host, configured to send an acquisition triggering pulse signal, and transmit the signal to the deep-towing part; and receive near-sea-bottom information acquired by the deep-towing part, and determine a near-sea-bottom condition according to the near-sea-bottom information. The deep-towing part includes: a data acquisition unit, configured to acquire near-sea-bottom information at a current position according to the acquisition triggering pulse signal; an electric spark vibration source, configured to generate an electric spark vibration signal according to the acquisition triggering pulse signal; and a multi-channel data-acquisition electronic cabin, connected to the comprehensive monitoring host, the data acquisition unit, and the electric spark vibration source separately, and configured to transmit the acquisition triggering pulse signal to the electric spark vibration source and the data acquisition unit, and transmit the near-sea-bottom information acquired by the data acquisition unit to the comprehensive monitoring host. In this way, the Fresnel radius can be reduced, and the detection resolution can be improved.

The present invention discloses a near-sea-bottom hydrate detection system, which includes a ship-borne part and a deep-towing part. The ship-borne part includes: a comprehensive monitoring host, configured to send an acquisition triggering pulse signal, and transmit the signal to the deep-towing part; and receive near-sea-bottom information acquired by the deep-towing part, and determine a near-sea-bottom condition according to the near-sea-bottom information. The deep-towing part includes: a data acquisition unit, configured to acquire near-sea-bottom information at a current position according to the acquisition triggering pulse signal; an electric spark vibration source, configured to generate an electric spark vibration signal according to the acquisition triggering pulse signal; and a multi-channel data-acquisition electronic cabin, connected to the comprehensive monitoring host, the data acquisition unit, and the electric spark vibration source separately, and configured to transmit the acquisition triggering pulse signal to the electric spark vibration source and the data acquisition unit, and transmit the near-sea-bottom information acquired by the data acquisition unit to the comprehensive monitoring host. In this way, the Fresnel radius can be reduced, and the detection resolution can be improved.

Disclosed is a diagnostic device for a seismic probe, the probe including, in an elongate tubular body, an electronic module, a capacitor bank and a spark gap adapted to generate a shock wave in a wellbore, the device including at least one sensor adapted to measure at least one parameter of the shock wave over time. The sensor is fixed to an inner surface of a wall of the tubular body, at a predetermined, non-zero distance from the spark gap in the direction of the electronic module. Also disclosed is a diagnostic method using the signals of the sensor.

Disclosed is a diagnostic device for a seismic probe, the probe including, in an elongate tubular body, an electronic module, a capacitor bank and a spark gap adapted to generate a shock wave in a wellbore, the device including at least one sensor adapted to measure at least one parameter of the shock wave over time. The sensor is fixed to an inner surface of a wall of the tubular body, at a predetermined, non-zero distance from the spark gap in the direction of the electronic module. Also disclosed is a diagnostic method using the signals of the sensor.

The present invention discloses a near-sea-bottom hydrate detection system, which includes a ship-borne part and a deep-towing part. The ship-borne part includes: a comprehensive monitoring host, configured to send an acquisition triggering pulse signal, and transmit the signal to the deep-towing part; and receive near-sea-bottom information acquired by the deep-towing part, and determine a near-sea-bottom condition according to the near-sea-bottom information. The deep-towing part includes: a data acquisition unit, configured to acquire near-sea-bottom information at a current position according to the acquisition triggering pulse signal; an electric spark vibration source, configured to generate an electric spark vibration signal according to the acquisition triggering pulse signal; and a multi-channel data-acquisition electronic cabin, connected to the comprehensive monitoring host, the data acquisition unit, and the electric spark vibration source separately, and configured to transmit the acquisition triggering pulse signal to the electric spark vibration source and the data acquisition unit, and transmit the near-sea-bottom information acquired by the data acquisition unit to the comprehensive monitoring host. In this way, the Fresnel radius can be reduced, and the detection resolution can be improved.

The present invention discloses a near-sea-bottom hydrate detection system, which includes a ship-borne part and a deep-towing part. The ship-borne part includes: a comprehensive monitoring host, configured to send an acquisition triggering pulse signal, and transmit the signal to the deep-towing part; and receive near-sea-bottom information acquired by the deep-towing part, and determine a near-sea-bottom condition according to the near-sea-bottom information. The deep-towing part includes: a data acquisition unit, configured to acquire near-sea-bottom information at a current position according to the acquisition triggering pulse signal; an electric spark vibration source, configured to generate an electric spark vibration signal according to the acquisition triggering pulse signal; and a multi-channel data-acquisition electronic cabin, connected to the comprehensive monitoring host, the data acquisition unit, and the electric spark vibration source separately, and configured to transmit the acquisition triggering pulse signal to the electric spark vibration source and the data acquisition unit, and transmit the near-sea-bottom information acquired by the data acquisition unit to the comprehensive monitoring host. In this way, the Fresnel radius can be reduced, and the detection resolution can be improved.

A method and system for electromagnetic method (EM) signal detection based on an onshore sparker source, the method including: arranging an EM signal detection system near a sparker source; releasing, by the sparker source, an electromagnetic pulse concomitantly in a discharge and mechanical energy output process; observing an electromagnetic response generated by the earth under the excitation of the electromagnetic pulse by means of the EM signal detection system for extracting distribution information of geo-electrical parameters; when the sparker source moves, moving the electromagnetic method signal detection system to a new position along with the sparker source while keeping their positions relative to each other unchanged; and repeating the above process after the movement is completed. According to the technical solution of the present invention, fine electromagnetic detection results can be obtained while seismic detection is carried out.

A method and system for electromagnetic method (EM) signal detection based on an onshore sparker source, the method including: arranging an EM signal detection system near a sparker source; releasing, by the sparker source, an electromagnetic pulse concomitantly in a discharge and mechanical energy output process; observing an electromagnetic response generated by the earth under the excitation of the electromagnetic pulse by means of the EM signal detection system for extracting distribution information of geo-electrical parameters; when the sparker source moves, moving the electromagnetic method signal detection system to a new position along with the sparker source while keeping their positions relative to each other unchanged; and repeating the above process after the movement is completed. According to the technical solution of the present invention, fine electromagnetic detection results can be obtained while seismic detection is carried out.

An equipment for stimulating increased oil recovery is described. The complex is most suitable for operations in wells where natural flow and gas-lift recovery methods are used, and also for combined treatment of bottom-hole formation zones together with acoustic (ultrasonic) emitters. The complex consists of two main parts: a surface power supply and control unit, and a downhole electro-hydraulic instrument consisting of a boosting inverter unit a capacitor unit and a plasma discharger. Said instrument has a diameter less than 52 mm, allowing the instrument to pass freely through all existing production tubing. The instrument has a modular structure, making it possible to build up the power of the plasma discharge from 0.5 to 3 kJ. The plasma discharger is designed to be easily disassembled for replacement of electrodes and installation of a new spool with a wire, the discharger having a mechanical drive of a wire feeding unit, set in motion by a piston mechanism that is powered by a high pressure pulse produced by the discharger itself. Using the equipment for increase in efficiency and cost-effectiveness of oil recovery enhancement operations when working through tubing.

An equipment for stimulating increased oil recovery is described. The complex is most suitable for operations in wells where natural flow and gas-lift recovery methods are used, and also for combined treatment of bottom-hole formation zones together with acoustic (ultrasonic) emitters. The complex consists of two main parts: a surface power supply and control unit, and a downhole electro-hydraulic instrument consisting of a boosting inverter unit a capacitor unit and a plasma discharger. Said instrument has a diameter less than 52 mm, allowing the instrument to pass freely through all existing production tubing. The instrument has a modular structure, making it possible to build up the power of the plasma discharge from 0.5 to 3 kJ. The plasma discharger is designed to be easily disassembled for replacement of electrodes and installation of a new spool with a wire, the discharger having a mechanical drive of a wire feeding unit, set in motion by a piston mechanism that is powered by a high pressure pulse produced by the discharger itself. Using the equipment for increase in efficiency and cost-effectiveness of oil recovery enhancement operations when working through tubing.