An X-ray Fluorescence Logging Probe Used for Deep Well Exploration

Abstract

An X-ray fluorescence logging probe for deep well detection, comprising: an excitation source (4), a detector, a nuclear pulse signal processing circuit, a power circuit, a communication circuit, and a cooling means which are provided in a tube body (1). A detecting window (2) is provided on the tube body (1); the cooling means is used for sealing the detector in the tube body (1) and is driven by the power circuit to cool the detector. The probe can realize X-ray fluorescence logging in a high-temperature and high-pressure environment by means of a simple electric refrigerating structure, thereby directly measuring element content of a well wall, so that the X-ray fluorescence logging probe is applicable to field geological exploration. Moreover, the instrument structure of the probe is simple, and by integrating a cooling means in the tube body, less space is occupied by the probe, so that the probe can be used in a small-diameter well and can meet the requirement for mineral exploring.

Description

technical field [0001] The invention relates to the technical field of deep well detection, in particular to an X-ray fluorescence logging probe used for deep well detection. Background technique [0002] X-ray fluorescence logging is an analytical technique that directly measures the content of elements in the wellbore wall downhole, and is an important part of well logging. [0003] The X-ray fluorescence logging probe is lowered to the target depth by the logging winch, and the excitation source (X-ray light tube or isotope excitation source) emits primary rays to excite the atoms on the well wall. During the de-excitation process of atoms, the characteristic X-rays of the elements are generated, which are detected by the detector in the logging probe, converted into electrical signals, processed by the nuclear pulse signal circuit, converted into digital signals, and accumulated into X-ray fluorescence energy spectrum . Compared with shallow well measurement, in deep w...

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Problems solved by technology

[0006] The object of the present invention is to provide an X-ray fluorescence logging probe for deep well detection in order to solve the technical problem that the above-mentioned existing X-ray fluorescence logging probe cannot meet the environmental requirements of deep well detection. Active cooling structure, with a diameter of less than 60mm, can work in a deep well environment with a pressure of 100 degrees Celsius and 50Mpa, so as to realize the elemental analysis of deep well detection

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