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Method for improving fluid saturation precision in CT (computed tomography) measurement

A saturation, precision technique

Inactive Publication Date: 2016-06-29
尹喜玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The accuracy of the existing CT scanning measurement of fluid saturation is not high, which is not conducive to accurate measurement. Therefore, we propose a method to improve the accuracy of CT measurement of fluid saturation to solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for improving the accuracy of CT measurement of fluid saturation proposed by the present invention comprises the following steps:

[0018] S1, Sampling: take a core sample, and dry the core sample through a dryer so that the water content of the core sample is 0.01%, and place it in a vacuum environment after drying;

[0019] S2, one-time treatment: place the dried core sample in the core holder, inject 100% saturated brine into the core, and measure the volume of saturated brine to obtain the volume of saturated brine after maintaining the temperature at 40°C for 1 hour ;

[0020] S3, secondary treatment: the core sample uses oil flooding water to create irreducible water, so that the core sample is in the state of irreducible water, the water yield and oil yield are measured at the outlet end of the core holder, and according to the water yield and oil yield Calculate the volume of bound water;

[0021] S4, measurement: CT scanning is performed on the core ...

Embodiment 2

[0023] A method for improving the accuracy of CT measurement of fluid saturation proposed by the present invention comprises the following steps:

[0024] S1, Sampling: take a core sample, and dry the core sample through a dryer so that the water content of the core sample is 0.03%, and place it in a vacuum environment after drying;

[0025] S2, one-time treatment: place the dried core sample in the core holder, inject 100% saturated brine into the core, and after 1.25 hours at a temperature of 45°C, measure the volume of saturated brine to obtain saturated brine volume;

[0026] S3, secondary treatment: the core sample uses oil flooding water to create irreducible water, so that the core sample is in the state of irreducible water, the water yield and oil yield are measured at the outlet end of the core holder, and according to the water yield and oil yield Calculate the volume of bound water;

[0027] S4, measurement: CT scanning is performed on the core sample full of irr...

Embodiment 3

[0029] A method for improving the accuracy of CT measurement of fluid saturation proposed by the present invention comprises the following steps:

[0030] S1, Sampling: take a core sample, and dry the core sample through a dryer so that the water content of the core sample is 0.04%, and place it in a vacuum environment after drying;

[0031] S2, one-time treatment: place the dried core sample in the core holder, inject 100% saturated brine into the core, and after 1.5 hours at 50°C, measure the volume of saturated brine to obtain saturated brine volume;

[0032] S3, secondary treatment: the core sample uses oil flooding water to create irreducible water, so that the core sample is in the state of irreducible water, the water yield and oil yield are measured at the outlet end of the core holder, and according to the water yield and oil yield Calculate the volume of bound water;

[0033] S4, measurement: CT scanning is performed on the core sample full of irreducible water to ...

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Abstract

The invention discloses a method for improving the accuracy of CT measurement of fluid saturation, comprising the following steps: S1, sampling: taking a rock core sample, drying the rock core sample through a dryer, so that the water content of the rock core sample is 0.01-1 %, placed in a vacuum environment after drying; S2, one-time treatment: place the dried core sample in a core holder, inject 100% saturated brine into the core, and continue at a temperature of 40-60°C After 1-2 hours, measure the volume of saturated brine to obtain the volume of saturated brine; S3, secondary treatment: the core sample uses oil flooding water to create irreducible water, so that the core sample is in the state of irreducible water, and the outlet end of the core holder The water output and oil output are measured, and the volume of bound water is calculated according to the water output and oil output; S4, measurement. The method of the invention is simple, suitable for practical application, can greatly improve the accuracy of CT measurement of fluid saturation, and is suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of methods for improving the accuracy of CT measurement of fluid saturation, in particular to a method for improving the accuracy of CT measurement of fluid saturation. Background technique [0002] As a routine testing technique in core analysis, CT technology is widely used in core description, core heterogeneity determination, core sample selection, fracture quantitative analysis, online saturation measurement, flow experiment research, etc. The use of CT to measure fluid saturation in rocks has become one of the most common and effective experimental methods for CT technology in the petroleum industry. [0003] The basic principle of CT scanning of rocks is: the X-ray beam generated by the X-ray tube in the CT machine is irradiated from multiple directions along a selected fault layer of the object. By measuring the amount of transmitted X-rays, it is calculated after digitization. These absorption coef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N1/28
CPCG01N33/24G01N1/28
Inventor 尹喜玲韩景奇孙燕新于翠妮任冰冰陈丽媛柳燕张会霞王芳隋光丽李娜
Owner 尹喜玲
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