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Method for measuring volume and saturation of rock debris fluid

A technology of fluid volume and saturation, applied in the direction of measuring devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve problems such as inaccurate fluid volume measurement, and achieve the effect of avoiding inaccuracy and saving costs

Pending Publication Date: 2021-11-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for measuring the volume of fluid in rock cuttings. This method does not need to directly measure the volume of the fluid, and can effectively avoid the problem of inaccurate measurement of the fluid volume caused by the contamination and loss of the fluid during the extraction process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a method for determining the volume of fluid in cuttings, wherein the method includes:

[0042] 1) CT scanning of the rock cuttings to be tested is performed to obtain the gray value distribution image of the rock cuttings to be tested, and the gray value distribution range is 1-12360;

[0043] 2) The fluid (oil and water) in the cuttings is extracted by means of distillation extraction (refer to the industry standard SY-T5336-2006), specifically, the water in the cuttings is evaporated by heating, and the water vapor is condensed Come down to collect, and then use the solvent carbon tetrachloride to extract the oil; the extracted oil and water are placed in a slender glass tube (the inner diameter of the glass tube is 5mm) (the extracted fluid is placed in a slender glass tube The middle height is 2cm-3cm) for CT scanning, and the gray value distribution range of oil and water is 1-4640;

[0044] 3) According to the gray value distribution of ...

Embodiment 2

[0046] This embodiment provides a method for determining the fluid saturation of cuttings, wherein the method includes:

[0047] A, utilize the method for measuring the fluid volume of cuttings that embodiment 1 provides to determine the fluid volume in the cuttings to be measured;

[0048] B. Determine the pore volume of the cuttings to be measured, specifically: B1 utilize the CT image processing software Avizo to determine the number of pixels of the gray value distribution image of the cuttings to be measured obtained in step A, that is, the total number of pixels of the cuttings to be measured number (about 2.22×10 9 ), will scan the pixel volume (2μm 3 ) multiplied by the total number of pixels of the cuttings to be measured to obtain the volume of the cuttings to be measured to determine the total volume of the cuttings to be measured, the total volume of the cuttings is 4.44 × 10 9 μm 3 ; B2 place the cuttings after the fluid extraction in step A in an oven for dryi...

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Abstract

The invention provides a method for measuring the volume and saturation of rock debris fluid. The method comprises the following steps: performing CT scanning on rock debris to be measured to obtain a gray value distribution image of the rock debris to be measured; extracting fluid in the rock debris to be measured, and enabling the extracted fluid to be subjected to CT scanning to obtain gray value distribution of the fluid; and determining the volume of the fluid in the rock debris to be measured according to the gray value distribution of the fluid and the gray value distribution image of the rock debris to be measured. The method for measuring thesaturation of the rock debris fluid comprises the following steps: determining the fluid volume in the rock debris to be measured by using the method for measuring the volume of the rock debris fluid; determining the pore volume of the rock debris to be measured; and calculating the saturation of the rock debris fluid by using the determined fluid volume in the rock debris to be measured and the pore volume of the rock debris to be measured. The method does not need to directly measure the volume of the fluid, and can effectively avoid the problem of inaccurate measurement of the volume of the fluid caused by pollution and loss of the fluid in the extraction process.

Description

technical field [0001] The invention belongs to the technical fields of petroleum and geology, and in particular relates to a method for measuring the volume and saturation of cuttings fluid. Background technique [0002] In oil and gas exploration, the measurement of fluid saturation parameters is a necessary link in oil and gas exploration and development. Mastering the fluid saturation of the oil layer is the basis for understanding the oil storage situation of the oil layer, estimating the reserves, and analyzing the production situation of the oil field. China's petroleum and natural gas industry standard SY / T5336-2006 has clearly given some of the most common measurement techniques at present, such as: (1) direct measurement method, including atmospheric dry distillation method; distillation extraction method (full diameter rock sample); distillation Extraction method (plunger rock sample); pressure-holding core analysis method; solvent flushing method; sponge coring ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/046G01N15/08
CPCG01N23/046G01N15/088G01N2015/0846
Inventor 公言杰赵孟军卓勤功柳少波万佳林
Owner PETROCHINA CO LTD
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