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A Density-Based Calibration Method and Device for Shale Gas Adsorption Gas Capacity

A technology of gas adsorption and calibration method, which can be used in measurement devices, specific gravity measurement, instruments, etc., and can solve the problems of negative numbers and reduction of isotherm adsorption curves.

Active Publication Date: 2019-03-15
PETROCHINA CO LTD
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Problems solved by technology

[0004] The embodiment of the present invention provides a density-based method and device for correcting the gas adsorption volume of shale gas to solve the problem in the prior art that the isothermal adsorption curve of the isothermal adsorption method decreases or even appears negative at high pressure

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  • A Density-Based Calibration Method and Device for Shale Gas Adsorption Gas Capacity
  • A Density-Based Calibration Method and Device for Shale Gas Adsorption Gas Capacity
  • A Density-Based Calibration Method and Device for Shale Gas Adsorption Gas Capacity

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Embodiment Construction

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] Such as figure 1 As shown, the embodiment of the present invention provides a density-based shale gas adsorption gas volume correction method, including:

[0057] Step 101. Obtain a mud shale sample, and crush the mud shale sample to a preset range to form mud shale sample particles.

[0058] Step 102, determining the particle density of the mud shale sample.

[0059] Step 103, placing the mud shale sample in a sample cylinder of a gas adsorption inst...

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Abstract

The invention provides a method and device for shale gas absorption quantity correction based on density and relates to the technical field of shale gas exploration and development. The method comprises the steps of smashing a shale sample to a preset mesh range to form shale sample particles, and determining shale sample particle density; placing the shale sample in a sample cylinder of a gas absorption instrument, and determining the weight of the shale sample applied in an experiment and a sample cylinder volume of the gas absorption instrument; determining free space volume after the shale sample is placed in the sample cylinder; performing gas absorption experiment on the shale sample, and obtaining reference cylinder volume of the gas absorption instrument, initial reference cylinder pressure, a first gas compressibility factor under the initial reference cylinder pressure, initial sample cylinder pressure, a second gas compressibility factor under the initial sample cylinder pressure, reference cylinder pressure after gas adsorption balance, a third gas compressibility factor under reference cylinder pressure after gas adsorption balance and experimental temperature, so as to determine the shale gas absorption quantity.

Description

technical field [0001] The invention relates to the technical field of shale gas exploration and development, in particular to a density-based method and device for correcting the amount of gas absorbed by shale gas. Background technique [0002] At present, with the continuous development of shale gas exploration and development technology, shale gas has become an important unconventional natural gas resource. The gas adsorption capacity of shale gas is the key parameter to correctly evaluate the gas content and resources of shale. At present, the existing technology usually uses the isothermal adsorption method to measure the amount of gas adsorbed by mud shale. The test process and calculation method of the isothermal adsorption method refer to the method of measuring the amount of gas adsorbed by coal. Take the amount of adsorbed gas. Since the amount of gas adsorbed by mud shale is much smaller than that of coal, and the gas adsorbed by mud shale is more sensitive to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N7/04G01N9/00
CPCG01N7/04G01N9/00
Inventor 马行陟柳少波赵孟军姜林卓勤功鲁雪松孟庆洋郝加庆田华范俊佳
Owner PETROCHINA CO LTD
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