Coal core internal gas ground test device and test method

Abstract

A ground tester for internal gases of coal cores comprises an analysis trolley and a furcation joint. The analysis trolley is of a cabinet structure, and the interior of the analysis trolley is of a frame plate structure. Two wheels are arranged on one side of the bottom of the analysis trolley. Two support cushion blocks are arranged on the other side of the bottom of the analysis trolley. A turning plate and a handle are arranged on the upper portion of the outer side of the analysis trolley. The lower lateral side of the turning plate is hinged to the analysis trolley. The top of the analysis trolley is open. A cover plate and an opening and closing plate are arranged at the opening position of the top of the analysis trolley. The cover plate is connected to the top of the analysis trolley through bolts. One side of the opening and closing plate is hinged to the cover plate through hinges, and the other side of the opening and closing plate is connected to the upper edge of the turning plate through a buckle. The ground tester has the advantages of reasonableness in design, capability of accurately measuring the content of gases such as small free gases and in-coal adsorbed gases under formation conditions, and crucial significance in reserves predication and development mode research.

Description

Technical field [0001] The invention relates to a ground test device for gas inside a coal core and a test method thereof. Background technique [0002] The gas inside the coal core is a general term for gases such as free gas and adsorbed gas in the coal seam. In recent years, due to the increasing demand for energy and the declining recoverable reserves of conventional oil and gas resources, one of the main mining targets in the future is coalbed methane. At the same time, mining coalbed methane can ensure the safety of coal mine production and improve the economic benefits of coal production. For coalbed methane, the ability to accurately measure the content of small free gas and adsorbed gas in formation conditions is of decisive significance for predicting reserves and research and development methods. [0003] At present, the ground test device and its test method for the gas inside the coal core basically measure the gas inside the coal core uniformly or under normal pressu...

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Problems solved by technology

[0003] At present, the ground test device and its test method for the gas inside the coal core are basically used to measure the gas inside the coal core uniformly or under normal pressure conditions. The devices for separate measurement are relatively bulky and have insufficient flexibility, which cannot be achieved on site. It is convenient to move and measure the formation pressure separately. However, for the actual demand for coring gas measurement, the long-distance pressure-holding transportation conditions are complex and costly, and the on-site measurement devices are bulky or cannot be measured separately. The specific content of gas and other gases does not meet the requirements of gas measurement

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