Multistage microseism digital well geophone device

Abstract

The invention discloses a multistage microseism digital well geophone device, which comprises a ground control unit, a cable, a torpedo connector and a plurality of stages of digital well geophones, and is characterized in that each stage of digital well geophone comprises a pushing driving assembly, a pushing action assembly and an electronic instrument assembly. The ground control unit is used for supplying power to the multi-stage digital in-well detector, sending a control command to each stage of in-well detector, and storing data acquired by each stage of in-well detector. The cable is a link for power supply, communication and interaction between a ground control unit and a multi-stage digital well geophone. The torpedo connector is used for cooperating with a cable and connecting each stage of digital in-well detectors. The multi-stage digital in-well detector is mainly responsible for microseismic signal acquisition and transmission. Each stage of digital well geophone comprises a pushing driving assembly and a pushing action assembly. The pushing structure has the advantages of being stable, reliable, simple in structure, accurate in action, wide in application range and convenient and fast to install and maintain.

Description

technical field [0001] The invention relates to the technical field of microseismic monitoring, and more specifically relates to a multi-level microseismic digital well geophone device. Background technique [0002] Rock fractures and seismic activity that occur during deep mining and oil well fracturing are often referred to as microseismic events. The seismic waves of such small earthquakes, that is, micro-seismic events, are collected by ground or well geophones, processed and interpreted, and the location and geometry of underground rock fractures can be understood. This technology is called micro-seismic monitoring technology. Microseismic monitoring currently commonly used methods include surface monitoring and downhole monitoring. Surface monitoring collects seismic waves of microseismic events by arranging seismometer strings on the ground. This method has the advantages of flexibility, speed, and simplicity. However, the collected The signal-to-noise ratio of the d...

AI Technical Summary

Problems solved by technology

Push-to-airbag airbags are easily damaged, and in water, affected by water pressure, their thrust is weak; the structure of the elastic arm of the electromagnetic relay is complex, and the push-to-rest arm can only be pushed away, and it cannot be retracted, and it is prone to jamming; the cylinder, The two types of mechanical push arm type of hydraulic cylinder mainly convert air pressure or hydraulic pressure into mechanical energy to drive the action of the push arm. Pneumatic hydraulic equipment needs to be protected and maintained in time during use. Maintenance is relatively troublesome and costly. Use or maintenance Improper use may easily cause air leakage and oil leakage, which will affect the driving effect and lead to unstable pushing

At the same time, there is also a motor single push arm mode, which is limited by the length of the push arm. For wells with small diameters, the push force is not enough, and the geophone in the well cannot be stably pushed against the well wall.

For wells with large diameters, due to the influence of the length of the push arm and the push distance, the geophone in the well cannot be pushed against the wall of the well, which cannot meet the needs of monitoring in the well

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