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Axial resolution determining device and system

A measurement device and measurement system technology, which is applied in the direction of measurement, geophysical measurement, instruments, etc., can solve the problems of insufficient accuracy, poor stability, radial medium imbalance and other problems of the measurement device, and achieve the effect of consistent calibration

Inactive Publication Date: 2009-11-04
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
  • Description
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Problems solved by technology

Some companies use some soil installation methods, such as nailing the glass fiber reinforced plastic tank around it and putting it downhole to simulate different formations, and then put the logging instrument into the glass fiber reinforced plastic tank to measure the axial resolution of the logging tool. However, the disadvantage of this soil device and soil method is that due to reasons such as rusty nails and unbalanced radial media, the accuracy of this measuring device is not enough and the stability is poor

Method used

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  • Axial resolution determining device and system
  • Axial resolution determining device and system

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Embodiment Construction

[0020] Such as figure 1 As shown, the device for measuring the axial resolution of the logging tool in this embodiment includes a large circular cylinder tank 1 and a circular circular cylinder small tank 2, and the small tank 2 is stacked on the large tank 1. The inner cylindrical surface of the tank body is formed as a through hole 16, the body of the large tank is filled with salt liquid, and the body of the small tank is filled with a part of the salt liquid. The electrolyte in the two tanks has a difference in conductivity. The diameter of the large tank and the small tank are the same. The height of the large tank is greater than the height of the small tank. The larger the height of the large tank is restricted by the construction conditions, the better. In consideration of economy and flexibility, the large tank weighs 2 or 3 tons. The height of the small tank is the largest thin layer size to be simulated.

[0021] The large tank and the small tank each have a circulatio...

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Abstract

The present invention relates to a measuring device and measuring system for the axial resolution of a well logging instrument. The device comprises two circular cylinder tanks, the inner cylindrical surface of which is formed as a through hole, and the tanks are stacked vertically. The tanks stacked below are filled with electrolyte, and the tanks stacked above are filled with electrolyte, and the electrolytes in the two tanks have a difference in conductivity. The measuring system includes an induction logging instrument and an axial resolution measuring device of the logging instrument, and the induction logging instrument is placed in the measuring through hole. By adopting the measuring device and the measuring system of the present invention, the accurate and continuous measuring of the axial resolution of the well logging instrument can be realized, and the consistent calibration of the well logging instrument can be realized at the same time.

Description

Technical field [0001] The invention relates to an axial resolution measuring device and a measuring system, in particular to an axial resolution measuring device and a measuring method of a logging instrument. Background technique [0002] Strictly speaking, there is currently no accurate measuring device for the axial resolution of logging tools in China. Some companies use some soil installation methods, such as putting nails around the glass fiber reinforced plastic tanks and putting them in the well to simulate different formations, and then putting logging tools into the glass fiber reinforced plastic tanks to determine the axial resolution of the logging tools. However, the disadvantage of this soil device and soil method is that the accuracy of the measuring device is insufficient and the stability is poor due to the rust of the nail and the uneven radial medium. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V13/00E21B47/00
Inventor 张瑞赵立新秦才会张向林罗曦
Owner CHINA NAT OFFSHORE OIL CORP
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