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Rock porosity measuring device

A measuring device and porosity technology, which is applied in the fields of oil and gas layer evaluation and geological petrophysical property measurement, can solve the problems of large results, low work efficiency, and difficult to guarantee measurement accuracy, and achieve the effect of reducing detection errors

Inactive Publication Date: 2017-09-15
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At the same time, if the plug cannot be completely connected to the end face of the cylindrical sample when loading the sample, the result will be too large
[0007] Any of the above methods requires at least two steps to complete, the work efficiency is low and the measurement accuracy is difficult to guarantee
At the same time, the above method cannot realize the automatic determination of the porosity of rock samples with arbitrary shapes.

Method used

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  • Rock porosity measuring device

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] Such as figure 1 As shown, a rock porosity measurement device 100 includes: a sample cup 1 , a sample cover 3 disposed inside the sample cup for wrapping the sample, and a gas pipeline connected to the bottom 2 and the cover 4 of the sample cup. A plurality of valves V1 to V9 are connected to the gas pipeline. A vacuum pump 6, a standard chamber 7 and a pressure sensor 8 are also connected to the gas pipeline. By controlling the switches between different valves, the vacuum pump 6 can evacuate the bottom or upper part of the sample cup; the standard chamber 7 and the pressure sensor 8 cooperate to measure the pressure value in the sample cup 1 under different states, and then calculate the pores of the rock 5 Rate.

[0025] In a specific embodiment of the present invention, V1 to V9 are all high-precision valves, wherein V1, V6 and V9 are vent valves. The vent va...

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Abstract

The invention provides a rock porosity measuring device, comprising a sample cup, a sample sleeve that sleeves a sample and is arranged in the sample cup, and a gas pipeline communicated with a bottom of the sample cup and a cover. The gas pipeline is connected with a plurality of valves. A vacuum pump, a standard chamber and a pressure sensor are also connected to the gas pipeline. By controlling opening and closing of the different valves, the vacuum pump may vacuumize the bottom or upper portion of the sample cup; the standard chamber and the pressure sensor can cooperate to measure the pressure value of the sample cup in different states and then the porosity of rock can be calculated. Through single sample loading and double vacuumizing, the rock porosity measuring device can measure total size of a rock sample and size parameters of a rock sample frame, a traditional porosity measuring process is changed, detection efficiency is improved, and measurement error is minimized.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir evaluation and geological rock physical property measurement, in particular to a rock porosity measuring device. Background technique [0002] As we all know, the effective porosity of a rock refers to the percentage of the connected pore volume of the rock to the total volume of the rock sample. Therefore, in order to obtain the effective porosity of the rock, it is only necessary to measure any two of the three parameters of the total volume of the rock, the volume of connected pores and the volume of the rock skeleton, and then the porosity can be calculated. [0003] When measuring the above three parameters in the prior art, there are usually the following methods: [0004] The determination of the total volume of rock samples usually includes: measurement method, which can be used for regular cylindrical samples, and the total volume can be calculated by measuring the length a...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 范明俞凌杰何治亮张文涛刘伟新郑伦举承秋泉王强陈红宇
Owner CHINA PETROLEUM & CHEM CORP
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