Rock porosity measuring method and device

A technology of rock porosity and measurement method, applied in measurement devices, analysis of suspensions and porous materials, instruments, etc., can solve the problems of low precision and complex measurement algorithm, and achieve the effect of high precision, accurate measurement and elimination of errors

Active Publication Date: 2021-03-12
武汉古生代检测科技有限公司
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  • Abstract
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Problems solved by technology

[0007] The present invention aims to solve the problem that the current measurement algorithm is complex and has low precision, and pro

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  • Rock porosity measuring method and device
  • Rock porosity measuring method and device
  • Rock porosity measuring method and device

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Embodiment Construction

[0028] The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings

[0029] Such as figure 1 is a structural schematic diagram of rock porosity measurement, from figure 1 It can be seen that the gas increasing device is included: gas cylinder 1, pressure gauge 1 2, booster pump 3, valve 1 4 and pressure gauge 2 5, valve 2 6, vacuum pump 7, release valve 8, thermostat 18, temperature and pressure sensor 12, Differential pressure sensor 16, pulse flow metering device 17, industrial computer 20, pipeline one 21, pipeline two 22, pipeline three 23, pipeline four 24, reference pressure vessel 9, comparison pressure vessel 14, sample pressure vessel 15 , the reference pressure vessel 9, the comparison pressure vessel 14, and the sample pressure vessel 15 are arranged in the thermostat 18, and the reference pressure vessel 9 is respectively connected to the comparison pressure vessel 14 and the sample pressure vessel 15...

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Abstract

The invention discloses a rock porosity measuring method which comprises the following steps: putting a comparison object and a rock sample to be measured with equal apparent volumes into a comparisonpressure container and a sample pressure container with equal volumes, inflating gas into the sample pressure container by adopting target pressure, and inflating gas into the comparison pressure container by adopting the same target pressure, and measuring the pressure difference between the sample pressure container and the comparison pressure container by using a differential pressure gauge, discharging the gas in the comparison pressure container until the pressure in the two containers is balanced, and calculating the porosity of the rock sample to be measured according to the volume ofthe discharged gas. The method ensures the experiment accuracy, and is high in precision and reliable in experiment result. The invention further discloses a measuring device based on the method.

Description

technical field [0001] The invention relates to the technical field of testing rock porosity such as coal, shale and sandstone, in particular to a rock porosity measuring method and a measuring device. Background technique [0002] Shale gas and tight sandstone gas belong to unconventional natural gas, and the reservoir pores of the natural gas are mainly nano-scale, featuring low porosity and low permeability. Porosity is one of the key parameters for the selection of favorable target areas for shale gas and tight sandstone gas, reservoir evaluation and productivity prediction. Therefore, how to accurately and quickly measure the porosity of shale or tight sandstone has important practical significance for exploration and development. [0003] At present, there are many methods that can measure the porosity of tight rocks. Among them, the measurement process of the conventional sandstone gas method porosity tester is as follows: firstly, the low-pressure gas is filled into...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0893
Inventor 王涛宜伟
Owner 武汉古生代检测科技有限公司
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