Multistage microseism digital well geophone device

A geophone and micro-seismic technology, applied in seismic signal receivers, seismology, measuring devices, etc., can solve the problems of electromagnetic relay spring arm structure complex, insufficient pushing force, and easy damage of airbags

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A geophone and micro-seismic technology, applied in seismic signal receivers, seismology, measuring devices, etc., can solve the problems of electromagnetic relay spring arm structure complex, insufficient pushing force, and easy damage of airbags

CN114508341APending Publication Date: 2022-05-17CHINA UNIV OF MINING & TECH (BEIJING)

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[0037] Such as figure 1 As shown, a multi-level microseismic digital well geophone device of the present invention includes: a ground control unit 1, a cable 2, a torpedo connector and several stages of digital well geophones 4. The multi-level digital well geophone 4 is placed downhole for the acquisition and real-time transmission of microseismic signals ( figure 1 middle A refers to the ground), each level of geophones is fixed on the well wall 3 through the push arm 23, and the geophones of each level are connected with the cable 2 through the torpedo connector, and the first stage of the geophone is controlled with the ground through the cable 2. Unit 1 is connected. The ground control unit 1 sends commands such as instrument inquiry, action of the push arm 23, start and pause of acquisition, etc. to the downhole geophones at all levels through the cable 2. Each stage of the geophone transmits the collected micro-seismic signal to the ground control unit 1 through the c...

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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...

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Application Information

Patent Timeline

17 May 2022

Publication

CN114508341A

IPC: E21B47/00; E21B49/00; G01V1/18; G01V1/52

CPC: E21B47/00; E21B49/00; G01V1/181; G01V1/52

Inventors: 孙远; 郑晶