Instrument for detecting coal seam gap distribution in coal seam gas and implementation method ofinstrument

Abstract

The invention discloses an instrument for detecting coal seam gap distribution in coal seam gas and an implementation method of the instrument, and belongs to the technical field of coal seam gap distribution detection, wherein the instrument comprises a mounting pedestal, a moving assembly is arranged below the mounting pedestal, and an inner groove is formed in the mounting pedestal. According to the instrument for detecting the coal seam gap distribution in the coal seam gas and the implementation method of the instrument, the movement convenience is improved, the instrument can move freelyaccording to conditions, dust is effectively prevented from entering due to the arrangement of dense grids, the overall heat dissipation and dust prevention effects are improved, the dust removal effect is achieved, dust is prevented from blocking devices in an equipment box, and the service life of the devices is prolonged; the instrument is simple in structure, convenient to mount and dismount,convenient to store and transport in the later period, capable of improving the use performance, capable of improving the rotation stability and the detection efficiency through clamping arrangement,capable of accurately reflecting the internal structure, capable of solving the inconvenience of a traditional detection device, capable of saving a large amount of time and materials and capable ofreducing the mining cost.

Description

technical field [0001] The invention relates to the technical field of coal seam void distribution detection, in particular to an instrument for detecting coal seam void distribution in coal seam gas and an implementation method thereof. Background technique [0002] The demand for oil and natural gas is increasing day by day, and the gap between supply and demand continues to widen. It is estimated that by 2020, the proportion of oil and natural gas gap will reach 52% and 30%, respectively. my country's coalbed methane geological resources are 36.8 trillion cubic meters, of which high-rank coalbed methane resources account for 23% of the total coalbed methane resources, and high-coal-rank coalbed methane resources in the Qinshui Basin account for 10.8% of the total resources (3.97 trillion) . On the basis of abundant resources, many coalbed methane companies such as PetroChina, CNOOC, Blue Flame, Yamei, and Orion have formed in Qinshui Basin. Over the past ten years of coa...

AI Technical Summary

Problems solved by technology

The open hole logging method can divide the formation lithology profile, determine the coal seam, evaluate the cementing quality inspection, etc., but cannot measure the gas production and water production status of each coal seam

The well test method makes a qualitative judgment on the productivity of each layer of the coalbed methane well through the method of layered pressure measurement, which cannot achieve quantitative interpretation

Gas well service technologies developed by foreign companies such as Schlumberger, Halliburton, Sondex, and Weatherford can measure parameters such as flow rate, temperature, pressure, density (gas holdup) and gamma depth, but the outer diameter of the instrument is 43mm, and the measurement range is only suitable for fluids above 20000m3 / d, so there is no small-diameter instrument to adapt to the measurement of coalbed methane wells with low gas production

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