Slit Spectroscopy Raman Spectroscopy Gas Analysis System Applied to Mud Logging Site

Abstract

The invention provides a slit beam-splitting Raman spectrum gas analysis system applied to a logging site. The system comprises at least one laser, a reflection pool, a high-flux slit beam-splitting part and a detector, wherein the at least one laser is used for generating laser which excites to-be-detected gas to generate Raman scattered light; the reflection pool comprises multiple reflectors and performs repeated reflection on the laser generated by the at least one laser, and the to-be-detected gas in the reflection pool is excited to generate the Raman scattered light; the high-flux slit beam-splitting part comprises at least one 1800-line flat field concave grating and is used for performing beam splitting on the Raman scattered light exiting from the reflection pool; and the detector is used for detecting and analyzing the Raman scattered light subjected to beam splitting, and the Raman spectrum of the to-be-detected gas is obtained. The Raman spectrum gas analysis system has relatively high sensitivity and precision and can be applied to the logging site.

Description

technical field [0001] The invention relates to gas spectrum analysis in gas logging mud logging, in particular to a slit spectroscopic Raman spectrum gas analysis system applied to mud logging sites. Background technique [0002] The Raman spectroscopy gas detection system is based on the principle of Raman spectroscopy to detect a variety of hydrocarbon and non-hydrocarbon gases. In the prior art, a helium-neon laser is used to generate laser light, and the reflectors at both ends of the detection cavity continuously reflect and amplify the energy by about 1000 times. Photons collide with gas molecules to generate Raman scattered light. Multiple optical filters and photoelectric sensors are installed on the inner wall of the detection chamber to absorb and detect specific spectral frequencies of different molecules, thereby obtaining the content of different gas components to be measured, and then Provide accurate basis for oil and gas exploration. [0003] The biggest f...

AI Technical Summary

Problems solved by technology

Due to the special environment of the mud logging industry, which is restricted by factors such as temperature, humidity, and dust, the detection accuracy and repeatability of the instrument are greatly affected. Coupled with the high price, it is difficult to popularize and apply this technology in the mud logging industry

Images