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Portable shallow gas-bearing stratum in-situ gas concentration measuring device and method

A gas concentration measurement, gas concentration technology, applied in the direction of measuring devices, material analysis through optical means, instruments, etc.

Pending Publication Date: 2020-01-10
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is no corresponding portable survey device that can measure the original gas concentration in gas-bearing formations in situ

Method used

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  • Portable shallow gas-bearing stratum in-situ gas concentration measuring device and method
  • Portable shallow gas-bearing stratum in-situ gas concentration measuring device and method
  • Portable shallow gas-bearing stratum in-situ gas concentration measuring device and method

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Experimental program
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Embodiment Construction

[0031] see figure 2 , the present invention provides a portable shallow gas-bearing formation in-situ gas concentration measurement probe, the probe 5 includes the following five parts:

[0032] see image 3 , The first part is composed of a conical head a1, a porous metal tube a4, a circular hole a2, and a first thread a3. The main function of the conical head a1 is to act as a hard end when the probe 5 penetrates into the formation. Its upper part is connected with a porous metal tube a4, and the outer surface of the porous metal tube a4 is in close contact with the second part of the probe 5, the cylindrical permeable stone b1 , the soil particles in the air-bearing soil layer 4 are blocked by the cylindrical permeable stone b1, and the groundwater and gas in the air-bearing soil layer 4 can freely enter and exit the porous metal pipe a4 through the cylindrical permeable stone b1 and the circular hole a2 , enter the inner cavity of the third part of the probe 5 through t...

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Abstract

The invention belongs to the field of geotechnical engineering investigation in the field of civil engineering, and relates to a portable shallow gas-bearing stratum in-situ gas concentration measuring device and method. The portable shallow gas-bearing stratum in-situ gas concentration measuring device comprises a static penetrometer, a static sounding rod, a circulating pump, a gas concentrationoptical fiber sensor control system and a probe. The static sounding rod is connected with the probe; the probe is connected with the circulating pump through a pipeline; and the probe is electrically connected with the gas concentration optical fiber sensor control system. The portable shallow gas-bearing stratum in-situ gas concentration measuring device and method provided by the invention aresimple in structure, clear in principle, convenient to assemble, disassemble and operate and easy to popularize.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering investigation in the field of civil engineering, and relates to a gas concentration measurement device and method, in particular to a portable shallow gas-bearing formation in-situ gas concentration measurement device and measurement method. Background technique [0002] Shallow gas generally refers to natural gas (including organic, inorganic or mixed origin gas) buried within 1500m below the surface. Formation rich in shallow gas is called gas-bearing formation. Gas-bearing formations are generally distributed in marsh wetlands, estuaries, deltas, lakes, and seabed sediments, as well as shallow formations rich in oil and gas resources. The gas in the soil layer mainly comes from the decomposition of organic matter under the action of anaerobic bacteria, biogenic gas, deep oil and gas, mantle gas, and magmatic activity, and is sealed in the shallow surface after upward migration through s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G01N21/01
CPCG01N21/84G01N21/01
Inventor 王勇孙富学孔令伟郑红剑肖飞王艳丽李好强
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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