Production method for calibration block of radioactive fluid density logging instrument

Abstract

The invention discloses a production method for a calibration block of a radioactive fluid density logging instrument. The method includes: making density calibrated scales equal in length and width but unequal in height according to the dimension of the sampling channel of the radioactive fluid density logging instrument, calculating scale coefficients of the fluid density logging instrument in air and pure water respectively and storing; placing the radioactive fluid density logging instrument in air, placing the density calibrated scales equal in length and width but unequal in height into sampling chambers respectively, using a logging ground system to read the scale coefficients and record displayed values of fluid density, and setting up data tables of the density calibrated scales unequal in height and the corresponding density values; determining the height values of the density calibrated scales unequal in height according to the data tables when the density value error is zero; and making a density calibration block according to the height values of the density calibrated scales. Using the method can produce corresponding standard calibration blocks for various radioactive fluid density logging instrument, the problem that errors of the calibration block are out of standard is effectively solved, and scale precision of the instrument is improved.

Description

technical field [0001] The invention discloses a method for making a scale block of a radioactive fluid density logging instrument, and belongs to the technical field of special instruments for measuring fluid density in well bores of oil and gas fields. Background technique [0002] At present, during production logging in oil and gas fields, the radioactive fluid density logging tool is used to measure the density of the fluid in the wellbore to determine the content of each phase of the fluid in the wellbore and its distribution along the wellbore, so as to determine the water cut and divide the fluid interface to draw The production profile and the radioactive fluid density logging tool need to be calibrated with a scale block before logging. [0003] The existing radioactive fluid density logging tool is composed of three parts: gamma source, sampling channel and detector. When the medium density in the sampling channel changes, the count of the detector changes accordi...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the scale block error of the existing fluid density logging instrument is large, provide a kind of manufacturing method of the scale block of the radioactive fluid density logging instrument, and make all kinds of radioactive fluid density logging instruments according to this method Standard Scale Block

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