Calibrator

Abstract

The invention relates to a calibrator, in particular to a natural gamma ray calibrator or a natural gamma ray spectral calibrator. The technical proposal is as follows: the calibrator comprises an activity layer and an interlayer, wherein the activity layer is arranged in the interlayer. In order to solve the technical problems that the prior calibrator has inconvenient use, rigorous working condition, high cost and the like, the invention provides the calibrator which has the advantages of small volume, high safety, low requirements on the working condition, low cost, and long service life.

Description

technical field [0001] The invention relates to a scaler, in particular to a natural gamma scaler or a natural gamma energy spectrum scaler. Background technique [0002] At present, various natural gamma ray logging tools and natural gamma ray spectrometers used in exploration logging, production logging, and logging while drilling are one of the most frequently used logging tools. Natural gamma logging response international The natural gamma API unit is commonly used in the world, and the three-level management of natural gamma measurement standards is generally implemented in my country, that is, the highest standard in the natural gamma industry-working standards-scalers, natural gamma and natural gamma energy spectrum in my country The highest standard in the industry is built in the logging instrument metering station, which is a physical model. Its natural gamma API unit is directly traced back to the natural gamma API well of the University of Houston in the United St...

AI Technical Summary

Problems solved by technology

[0003] Scalers are generally used in the form of simulators, which are mainly used for on-site calibration of well logging. According to the standard management regulations, the natural gamma ray work standard is calibrated once a year. Scalers are generally provided by the instrument manufacturer with the instrument. The shapes are different, and the most representative What is most striking is the "yellow cloth" of Schlumberger and the point source scale of Baker-Atlas. In fact, the two largest and most representative scales above are found in use, and they still exist. There are obvious flaws: for example, Schlumberger's "yellow cloth", due to its own elasticity, the tightness of the wrapping varies from person to person, resulting in a difference of up to several API values, while Baker-Atlas The company's point source scale frame is very sensitive to the difference in placement position, a little bit of misalignment, which also causes a large error, and because the placement position is far away from the object to be measured, it contains many radioactive sources and is large in size, so it is difficult to store and use It is very inconvenient to treat it as a radioactive source

At the same time, most of these natural gamma scales are made of radium sources. After the 750 factory of my country’s radium source professional sub-packaging factory changed production, the radium source is mainly imported, and the procedures are troublesome and expensive.

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