Instrument for scanning and measuring natural gamma and gamma energy spectrums of rock sample

Abstract

The invention provides an instrument for scanning and measuring natural gamma and gamma energy spectrums of a rock sample, which comprises an automatic scanning system. The automatic scanning system is provided with a support table, a detection device arranged on the support table, a sample box and a power device, the power device can drive the sample box to move to pass through the detection device, and therefore, the detection device scans and measures the sample in the sample box; a measurement and control module is connected with the automatic scanning system and used for controlling the power device and the detection device and collecting related measurement parameters; and a measurement upper computer is connected with the measurement and control module, the upper computer is used for issuing a measurement instruction and collecting, calculating, displaying and storing measurement parameters collected by the measurement and control module. The instrument is compatible with a drilling site, a laboratory, drilling rock debris measurement and rock core measurement and is easy to operate and high in measurement precision.

Description

technical field [0001] The invention belongs to the technical field of geological analysis, and mainly relates to an instrument for scanning and measuring natural gamma and gamma energy spectrum of rock samples (such as rock cores, cuttings, etc.). Background technique [0002] Drilling is the most important operation of drilling for oil and gas. During the drilling process, the formation rock samples obtained mainly include cores and cuttings. The underground rock samples obtained by drilling are used to study key geophysical and geological information such as petrophysical properties, sedimentary characteristics, hydrocarbon abundance, lithology, and rock mechanical properties of downhole formations. They are the first-hand valuable information for studying formations and oil and gas information. At the same time, the measurement of the core is also an important means of calibrating the downhole measurement instruments (such as resistivity, gamma instruments, etc.). [0...

AI Technical Summary

Problems solved by technology

[0005] 1. At present, the measurement of cuttings or cores by measuring instruments mainly adopts the measurement method of a single sample, and the single samples are put into the measuring instrument one by one for measurement. The measurement of cuttings and cores is carried out by instruments with different structures. The measurement efficiency not tall;

[0006] 2. Some instruments for measuring rock gamma and energy spectrum have a large shield structure, and some instruments for measuring gamma energy spectrum even weigh up to tons, which limits the scope of use of the instrument and can only be carried out in the laboratory Measurement

It cannot meet the requirements of real-time measurement of samples;

[0007] 3. The core gamma measurement method described in the current published patents and literatures arranges the core on the ground and uses the manual pulling instrument for measurement. As a result, during the measurement process, the manual pulling of the instrument cannot guarantee the uniform movement of the instrument, so the measurement is subject to artificial Large influence factors

In addition, the gamma rays in the ground environment have strong background data, which makes the measurement process affected by the environment and the measurement error is extremely large

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