Acoustic wave detection equipment for detecting cementation quality of cement protection layer of gas storage well

Abstract

The invention discloses acoustic wave detection equipment for detecting cementation quality of a cement protection layer of a gas storage well, and the acoustic wave detection equipment is used for detecting the cementation quality of the cement protection layer of an outer layer of the gas storage well. The acoustic wave detection equipment comprises a housing, a multi-core armor cable, a collarlocator fixed inside the housing, an electronic circuit structure, a transmitting sensor; a receiving sensor, and a ground control system, wherein the electronic circuit structure is fixed to a lowerpart of the collar locator and comprises a signal amplifier, a low pass filter, a transmission controller, a digital signal processor, a coupling transformer, an instrumentation amplifier, a band passfilter, an analog-to-digital converter and a high-speed remote transmission module; the receiving sensor comprises a short spacing receiving sensor and a long spacing receiving sensor fixed to the lower part of the transmitting sensor, the short spacing receiving sensor is 1.4 m away from the top of the housing, the long spacing receiving sensor is located at the bottom of the housing, and soundinsulating materials are filled between the transmitting sensor and the short spacing receiving sensor and between the short spacing receiving sensor and the long spacing receiving sensor.

Description

technical field [0001] The invention relates to an acoustic wave detection device, in particular to an acoustic wave detection device for detecting the cementation quality of an external cement protective layer of a gas storage well storing compressed gas. Background technique [0002] Gas storage well is the abbreviation of compressed gas underground gas storage well. It is a well-type tubular device placed vertically underground for storing compressed gas. It is a typical representative of underground pressure vessels. Distribution stations and industrial gas storage facilities and other fields. [0003] Its main part is composed of wellbore, cement protective layer, wellhead device, bottom hole device, sewage pipe, surface casing, centralizer and so on. The cement protective layer between the wellbore of the gas storage well and the formation plays an important role in preventing the failure of the gas storage well. On the one hand, it can fix the wellbore to prevent the...

AI Technical Summary

Problems solved by technology

[0006] At present, the detection of cement protection layer cementation quality of gas storage wells generally directly adopts the method and equipment of acoustic amplitude / variable density logging, without considering the difference between gas storage wells and oil and gas wells, resulting in low detection accuracy and vertical resolution, which cannot meet the requirements of gas storage wells. Requirements for quality inspection of cement protective layer bonding

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