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

A high temperature and high pressure, isothermal adsorption technology, applied in the direction of using material absorption and weighing, can solve the problems of high price of magnetic levitation balances, expensive instruments, unfavorable promotion of isothermal adsorption experiments by gravimetric method, etc., to ensure the accuracy and reliability of experiments. The effect of reducing instrument cost and avoiding the influence of high and low temperature

Pending Publication Date: 2018-08-28
CHENGDU HAOHAN WELL COMPLETION & LOGGING SCI & TECH
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  • Abstract
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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

Method used

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

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Embodiment 1

[0044] Such as figure 1 As shown, this embodiment provides a gravimetric high temperature and high pressure isothermal adsorption device, including: weighing system 24 , autoclave body 23 , constant temperature device 20 , high pressure gas source 25 , vacuum system 26 and data acquisition and processing system 27 . Wherein the weighing system 24 is fixed inside the autoclave body 23, a constant temperature device 20 is arranged at the bottom of the weighing system 24, a high-pressure gas source 25 and a vacuum system 26 are respectively connected to the weighing system 24, and the measuring device passes through the data acquisition and processing system. 27 Control the temperature and pressure, and collect and process the data during the experiment.

[0045] Such as figure 2 The weighing system 24 shown includes a balance 2, a weighing conversion device, a weight and a sample cylinder 19. The balance 2 is installed on the balance support 1, and the balance 2 for weighing u...

Embodiment 2

[0049] The principle and specific implementation method of testing coal rock or shale isothermal adsorption using a gravimetric high temperature and high pressure isothermal adsorption device provided by the present invention are as follows:

[0050] (1) Sample treatment: After crushing, the sample is dried in an oven for use. Before the test, the sample is vacuumed and degassed to fully remove moisture and impurity gases.

[0051] (2) Blank experiment: no sample was installed during the blank experiment, nitrogen was used as the medium, and the inner sleeve and connecting pipe were connected to ensure the seal of the autoclave body. Use a constant temperature device to control the constant temperature of the autoclave body. When the temperature is constant, set different pressure points in the experimental pressure to obtain a set of balance weight readings of weight Ⅰ, weight Ⅱ and sample cylinder, respectively Δm Ⅰ1 , Δm Ⅱ1 and Δm sc :

[0052] Δm Ⅰ1 = m Ⅰ +Δm t -ρ g...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02
CPCG01N5/02
Inventor 陈一健陈星宇张伦平许秀彬王柯景
Owner CHENGDU HAOHAN WELL COMPLETION & LOGGING SCI & TECH
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