Weight method-based high-temperature and high-pressure isothermal adsorption measurement device and method

Abstract

The invention discloses a weight method-based high-temperature and high-pressure isothermal adsorption measurement device and method. The device comprises a weighing system, wherein the weighing system comprises a balance, a weighing conversion device, weights and a sample barrel; the balance is mounted on a balance bracket; a hanging hook is arranged at the bottom of the balance; the weighing conversion device comprises three groups of motors, shifting forks and limiters; the shifting forks are horizontally arranged on the balance bracket; the limiters are arranged above and below the shifting forks in parallel; each motor is arranged at one end of each shifting fork and is used for driving the shifting fork to move up and down; the weights comprise a weight I and a weight II; the weightI and the weight II are hung on the hanging hook through metal wires; the sample barrel is hung on the hanging hook through a metal wire and is located between the weight I and the weight II. The measurement method is completed through steps of sample treatment, a blank experiment, a buoyancy experiment, an adsorption experiment and the like. On the basis of guaranteeing the experimental accuracyand reliability, the technical weight method-based high-temperature and high-pressure isothermal adsorption measurement device reduces the instrument cost and is favorable for popularization of a weight method-based isothermal adsorption experimental method.

Description

technical field [0001] The invention relates to a technology for measuring the adsorption performance of porous media, in particular to a gravimetric high-temperature, high-pressure isothermal adsorption measurement device and method. Background technique [0002] In recent years, with the continuous deepening of exploration, it has become more and more difficult to increase the reserves and production of conventional oil and gas resources, and the strategic position of unconventional oil and gas resources has become increasingly important. Among them, coalbed methane and shale gas are unconventional natural gas resources, which are rich in resources and have great development potential, and are high-quality and clean energy sources. Coalbed methane and shale gas are mainly stored in the reservoir in the free state and adsorbed state. Among them, the content of adsorbed gas is a key parameter for calculating the resources of coalbed methane and shale gas. Prediction of reco...

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Problems solved by technology

[0004] However, the adsorption experiment based on the gravimetric method needs to solve the impact on the balance under the high temperature and high pressure environment. The existing technical scheme uses a magnetic levitation balance, which is not in the high temperature and high pressure system, so it is not affected by the high temperature and high pressure environment, but the price of the magnetic levitation balance Expensive, so that the price of the entire instrument is relatively expensive, such as the high-pressure isothermal adsorption instrument of the magnetic levitation balance gravimetric method, which is not conducive to the promotion of the gravimetric isothermal adsorption experiment

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