Sector sound wave relative amplitude calculation method based on attenuation rate scales

A technology of relative amplitude and calculation method, applied in earthwork drilling, surveying, wellbore/well components, etc., to achieve the effect of improving accuracy

Pending Publication Date: 2020-12-22
北京吉尔菲斯科技有限公司
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Problems solved by technology

[0006] In order to solve the quantitative calibration problem of the relative amplitude of the radial acoustic wave amplitude logging, the method for calculating the relative amplitude of the sectoral acoustic wave based on the attenuation rate scale proposed by the present invention

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  • Sector sound wave relative amplitude calculation method based on attenuation rate scales
  • Sector sound wave relative amplitude calculation method based on attenuation rate scales
  • Sector sound wave relative amplitude calculation method based on attenuation rate scales

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Embodiment 1

[0046] A method for calculating the relative amplitude of sector sound waves based on the decay rate scale, comprising the following steps:

[0047] 1) Carry out the consistent calibration of the acoustic wave response of the 3ft probe of the radial acoustic wave amplitude logging tool

[0048] The calibration method requires the use of another patent application: "Sound Amplitude Attenuation Rate Calibration Method for Acoustic Variable Density Logging Instrument". Specific steps are as follows:

[0049] (1) Place the instrument in the middle of a casing, place the casing in a pressure vessel, place a transmitting probe at the end of the casing and at the end of the variable-density acoustic wave, and connect the transmitting probe to the 5ft probe of the variable-density acoustic wave instrument The distance is 3ft, and the frequency is equal to the frequency at which the logging tool transmits the probe. The 3ft probe and 5ft probe of the logging tool respond to the launc...

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Abstract

The invention discloses a sector sound wave relative amplitude calculation method based on attenuation rate scales. The method comprises the following steps of: 1) performing 3ft probe sound wave response consistency calibration on a sound wave variable-density measurement unit of a radial sound wave amplitude logging instrument; 2) performing sector sound wave probe sound wave response consistency calibration on the sound wave variable-density measurement unit of the radial sound wave amplitude logging instrument; 3) selecting a well section on a logging site, recording a plurality of pointsat fixed points by an instrument, and solving related scale parameters; 4) solving the attenuation rate ALKj sector sound wave amplitude of each sector sound wave of each measurement point on the basis of the related scale parameters; and 5) performing logging according to instrument requirements, and calculating and outputting the relative sound wave amplitude value of each sector. Therefore, foreach sector, the cement cementing rate of each sector can be solved according to an existing interpretation chart; and the quantitative description of the cement cementing quality of the sectors is realized, so that the curve quality and the interpretation accuracy are improved.

Description

technical field [0001] The invention relates to the technical field of petroleum well logging, in particular to a method for calculating the relative amplitude of sector acoustic waves based on the attenuation rate scale. Background technique [0002] Cementing quality evaluation Logging is an important basis for testing the quality of cementing construction, and it is also the basic basis for deploying oil testing, gas testing and analyzing the productivity of production layers. The radial acoustic wave amplitude logging tool is an important tool for cementing quality evaluation and one of the main means to describe the distribution of cement outside the casing. Among them, the radial acoustic wave amplitude logging tool includes an 8-sector radial acoustic wave amplitude logging tool and a 6-sector radial acoustic wave amplitude logging tool. 8 or 6 receiving probes (called sector acoustic wave probes) are uniformly arranged around the source distance position, and a full...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/005E21B47/16
CPCE21B47/16
Inventor 秦军张新江李江博史国发牛承东王亚东袁吉祥任杰刘一品王荣普潘文明黎涵
Owner 北京吉尔菲斯科技有限公司
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