Movable matural gamma scale well during drilling

A gamma scale, mobile technology, applied in the direction of earthwork drilling, wellbore/well components, etc., can solve the problems of not being able to scale, achieve the effect of convenient calibration, meet the needs of calibration, and reduce fluctuation errors

Inactive Publication Date: 2006-10-25
SHENGLI PETROLEUM ADMINISTRATION BUREAU DRILLING TECH ACAD SINOPEC
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AI Technical Summary

Problems solved by technology

Since the wireline gamma ray logging tool does not work in the drill collar, the existing wireline gamma ray logging calibration method and calibration device do not consider the influence of the drill collar. , it is impossible to put the gamma-ray logging tool together with the drill collar while drilling
Therefore, it cannot be directly used for the calibration of the natural gamma ray logging tool while drilling

Method used

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  • Movable matural gamma scale well during drilling

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Embodiment Construction

[0012] Now in conjunction with the accompanying drawings of the description, the present invention will be further described.

[0013] figure 1 Schematic representation of a mobile-while-drilling gamma-ray graduated well. The casing 1 has undergone anti-corrosion treatment, and a fiberglass borehole 3 is installed on its inner axis, and a hook is provided on the outside of the casing 1, so that the position of the natural gamma-ray scaled well while drilling can be moved arbitrarily. A base 5 is installed under the shell 1, a sealing device 4 is installed between the shell 1 and the base 5, and an emptying device 6 is installed on the side of the base 5. Filling material 2 is potassium, uranium, and thorium element materials that have undergone anti-radon gas migration treatment. The proportion of potassium, uranium, and thorium ore is 5.5% potassium, 12 μg / g uranium, and 30 μg / g thorium, which is close to the radioactive content of mudstone in China. The proportional relati...

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Abstract

The invention is a mobile natural gama scaling-while-drilling (SWD) well, comprising casing, fillings and hole, where the casing is anticorrosive and provided with hook outside, which can make the well moved at will, the axis in the casing is provided with glass steel hole, and the poured potassium-containing uranothorite fillings is in the annular space formed by the casing and the hole. And the measurement values of the SWD well can directly trace to the source of natural gama API industrial standard and the natural gama logging-while-drilling (LWD) device can scale in the SWD well together with the drill collar, correcting the effect of the drill collar on the natural gama counting rate and meeting the scale requirements of the natural gama LWD device.

Description

Technical field: [0001] The invention relates to a calibration well device of a logging-while-drilling instrument used in the field of petroleum exploration. Background technique: [0002] The GR logging tool while drilling is an important logging equipment for directional drilling and horizontal drilling. It measures the natural gamma ray intensity within a certain range around the borehole. Due to the influence of various factors such as the structure of the tool while drilling, the efficiency of the detector, and the borehole condition, the uncalibrated gamma ray is used in the same interval in the same borehole. Different gamma ray logging tools while drilling will produce different measurement results, even the measurement results of gamma ray logging tools while drilling in the same formation are different from those of wireline gamma ray logging tools. If the instrument is not calibrated, the natural gamma ray logging while drilling can only be used as the basis for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 杨锦舟张海花肖红兵郭淑会杨全进
Owner SHENGLI PETROLEUM ADMINISTRATION BUREAU DRILLING TECH ACAD SINOPEC
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