Frozen soil area remote tubular ground temperature observation device and observation method thereof

Abstract

The embodiment of the invention discloses a frozen soil area remote tubular ground temperature observation device. The device comprises a temperature monitoring device, a data acquisition instrument and wireless transmission equipment, and further comprises a solar power supply device used for supplying power and a monitoring terminal used for remote monitoring. The invention further discloses anobservation method of the ground temperature observation device comprises the steps that an outer pipe, an inner pipe and an axial temperature pipe of a casing pipe are buried in a drilled well in a frozen soil area; and initial positions of temperature sensors at different depths in the casing pipe are arranged; frozen soil backfilling is carried out in sequence, and the temperature sensors are electrically connected with the axial temperature pips and the data acquisition instrument; the temperature sensors are used for acquiring the temperature permeation influence rate of the environmentaltemperature on the surface frozen soil, and the monitoring data acquisition periods of the temperature sensors at different depths are calculated according to the temperature permeation influence rate; and fine tuning is carried out on a determined periods of the temperature sensors, and statistical analysis is carried out on acquired data of the temperature sensors.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of natural gas hydrate collection, and in particular to a remote tube-type geothermal observation device and an observation method thereof in permafrost regions. Background technique [0002] Natural Gas Hydrate (Natural Gas Hydrate) is an ice-like, non-stoichiometric, clathrate solid compound composed of water and small guest gas molecules at low temperature and high pressure, commonly known as "combustible ice", because the gas component in it is mainly methane, so it is also called Methane hydrate (MethaneHydrate). Natural gas hydrate has a high energy density. Under ideal conditions, 1m 3 The natural gas hydrate can be decomposed into 164m 3 methane gas and 0.8m 3 The burning pollution of water is much smaller than that of coal, oil, and natural gas, and it has abundant reserves. The global reserves are enough for human use for 1,000 years. Therefore, it is regarded by variou...

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Problems solved by technology

Moreover, even the temperature logging with the most mature technology and relatively reliable data needs to be measured when the drilling fluid is in a liquid state. During the measurement process, the drilling fluid is in a liquid state and is easy to freeze. Therefore, after this type of drilling is used once, due to The drilling fluid freezes and cannot be used again

At the same time, the measurement result only measures the variation trend of the drilling fluid, and the drilling fluid is prone to temperature transfer in different deep layers, so the temperature measurement result is an estimation result, and the accuracy is not high enough. The calculation of the gas hydrate stable zone The impact is relatively large, which affects the evaluation of gas hydrate resource potential and the calculation of resource volume in my country's permafrost regions

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