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Multi-detector multifunctional mixed logging device based on X-ray backscattering

A backscattering and X-ray technology, applied in the field of oil and gas exploration, to achieve strong penetration, improve accuracy, and improve the accuracy of measurement

Active Publication Date: 2021-11-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0003] The present invention aims at the improvement needs in the above-mentioned prior art, and provides a multi-detector multifunctional hybrid logging device based on X-ray backscattering, which can Overcome the shortcomings of existing logging methods and improve measurement accuracy

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  • Multi-detector multifunctional mixed logging device based on X-ray backscattering

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Embodiment Construction

[0052] In order to better understand the purpose and function of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0053] A multi-detector imaging logging device based on X-ray backscattering provided by the present invention, such as figure 2 As shown, it includes: X-ray generator unit, X-ray detection unit, data storage unit, terminal data analysis unit and three-dimensional reconstruction unit.

[0054] The X-ray generator unit is used to emit X-rays to the detected well wall, and control the X-rays to irradiate the surface of the detected well wall formation in all directions. In this embodiment, the X-rays pass through the collimator and irradiate the formation. During the irradiation process, the X-ray generator rotates 360 degrees along with the cable and rises slowly to ensure all-round irradiation of the formation in the well. The X-ray energy generated by the X-ray generator is: 1...

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Abstract

The invention belongs to the technical field of oil and gas exploration, and particularly relates to a multi-detector multifunctional mixed logging device based on X-ray backscattering. The device realizes three-dimensional reconstruction through an image processing and reconstruction unit, so that a finally obtained image can reflect the actual condition of a stratum more truly, and the measurement accuracy is improved. According to a terminal data analysis unit, on one hand, electron density is calculated in a numerical analysis mode based on energy distribution information obtained by a detection unit, and thus stratum density measurement of a detected well wall is achieved; and on the other hand, the types and contents of elements in the stratum are obtained based on an X-ray fluorescence measurement principle. Compared with sound wave imaging logging in the prior art, the device has the advantages of better distinguishing between different media due to the fact that the X-rays have high penetrabilit, so that the formed image has higher resolution. Compared with micro-resistance imaging logging and array induction logging, due to the fact that the photoelectric effect energy spectrums of the X-rays at different lithologies are different, the lithology influence can be overcome.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploration, in particular to an X-ray backscattering-based multi-detector multifunctional hybrid logging device. Background technique [0002] Well logging is a method of obtaining geophysical parameters by using the electrochemical properties, electrical conductivity, acoustic properties, radioactivity and other geophysical properties of rock formations. There are many logging methods, commonly used are micro-resistivity imaging logging, array induction logging, and acoustic reflection imaging logging. Micro-resistance imaging logging displays different resistivity values ​​through different colors, and its detection depth is relatively shallow, which is affected by factors such as formation thickness, lithology, porosity and shale content, fluid properties in the flushing zone, and borehole wall irregularities. Unable to obtain real borehole wall information; array induction logging is aff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/002G01N23/203G01N23/223
CPCE21B47/00E21B47/0025G01N23/203G01N23/223
Inventor 张琼高建华汪洋林绿林武蕙琳
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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