Gas sensor with gas chromatographic analysis function

Abstract

The invention discloses a gas sensor with a gas chromatographic analysis function, and relates to the field of gas detection. The gas sensor comprises a degassing device, a gas detection device and agas circuit driving device, wherein the degassing device is used for separating gas from drilling fluid; the gas detection device is connected with the degassing device, and used for performing gas chromatographic analysis; the gas circuit driving device is used for driving the gas in the degassing device into the gas detection device; the degassing device comprises a gas-liquid separation chamberformed by enclosure of a semi-permeable membrane; the gas detection device comprises a hollow optical fiber, an infrared light source positioned at the end of the hollow optical fiber, and a wavelength scanning detector; and the inside of the hollow optical fiber communicates with the gas-liquid separation chamber through a communicating pipe. Since gas-liquid separation and gas chromatographic analysis can be realized only through the semi-permeable membrane and the hollow optical fiber, compared with degassers, gas chromatographs and the like in the prior art, the sensor is compact in size,stable in efficiency, light in weight, easy and convenient to carry and install, thus lowering the cost of operation.

Description

technical field [0001] The invention relates to the field of gas detection, in particular to a gas sensor with gas chromatography analysis function. Background technique [0002] One of the main tasks of oil and gas exploration is to find oil and gas. Through the analysis of the gas carried in the drilling fluid, the content of hydrocarbon components and non-hydrocarbon gas components can be obtained, and the oil and gas in the reservoir can be identified accordingly. At present, gas chromatograph is the most widely used gas detection instrument in engineering operations. It can continuously measure the gas in the formation fluid carried by the upward drilling fluid, and provide content analysis of limited gas component characteristic samples such as hydrocarbons and non-hydrocarbons within tens of seconds or minutes, helping field personnel to find oil in time air layer. [0003] The device that separates the gas in the drilling fluid is called a degasser. The separated...

AI Technical Summary

Problems solved by technology

The drilling fluid degasser is responsible for separating the gas in the mud. The above-mentioned long-distance transmission to the chromatograph separates the individual component gases through the chromatographic column, and then each component enters the detector one by one and converts it into an electrical signal for analysis. lead to long detection cycle

The detection principle requires auxiliary gas, combustible gas, carrier gas, etc., resulting in a lot of auxiliary equipment, such as air compressors, hydrogen generators, nitrogen generators, etc., occupying a lot of valuable space and increasing costs

[0007] It can be seen from the above that the existing degasser and gas chromatography analysis equipment have high requirements for the installation, maintenance and practicality of the work site, which not only occupy valuable space, but also increase the operating cost

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