Method for carrying out CT scanning analysis processing upon rock core sample

A CT scanning, analysis and processing technology, applied in the direction of using radiation for material analysis, material analysis by optical means, and material analysis, etc., can solve the problems of damage to the integrity of the core, labor and time consumption, and save the cost of coring, Good analysis and the effect of reducing the number of repeated core mining

Active Publication Date: 2013-05-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Such a test method destroys the integrity of the core obtained by drilli

Method used

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  • Method for carrying out CT scanning analysis processing upon rock core sample
  • Method for carrying out CT scanning analysis processing upon rock core sample
  • Method for carrying out CT scanning analysis processing upon rock core sample

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specific Embodiment

[0052] A specific embodiment utilizing the method of the present invention is as follows:

[0053] D66-2 core is a core sample collected from well D66 in a gas field. This well is a high-yield gas well with high acoustic wave and high resistance characteristics. A cylindrical sample with a diameter of 25 cm and a length of 5 cm was drilled on the entire core. , using the ultrasonic-time method to test the velocity of the D66-2 sample, the obtained longitudinal wave velocity is 4940m / s, and the shear wave velocity is 2965m / s.

[0054] Sample D66-2 was made, and the core mineral composition was identified under a microscope. The main mineral components are quartz, feldspar, cuttings, kaolinite and mud. The specific thin section identification results are shown in Table 1.

[0055]

[0056]

[0057] Table 1

[0058] Carry out CT scan to rock core sample, set up three-dimensional stereo scanning figure, then find a cut plane that exists barite mineral and pore on image as m...

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Abstract

The invention provides a method for carrying out CT scanning analysis processing upon a rock core sample. The method belongs to the field of rock physical studies. According to the method, rock core sample mineral components and contents are identified first; the rock core sample is subjected to CT scanning, such that a rock core sample three-dimensional grayscale image is obtained; with the mineral components and contents of the rock core sample, rock core sample internal density value distribution is obtained; with the density value distribution, rock core sample internal mineral phase distribution is obtained; according to intrinsic acoustic velocity values of the mineral phases, rock core sample internal acoustic velocity value distribution is obtained; and according to the obtained acoustic velocity value distribution, rock core sample acoustic velocity value is obtained, and is used for researching anisotropic properties of the rock core. With the method provided by the invention, rock core is not damaged, and rock core acoustic velocity value is obtained, such that rock core reusability is improved, coring cost is saved, and rock core processing manpower and material consumptions are saved.

Description

technical field [0001] The invention belongs to the field of rock physics research, and in particular relates to a method for performing CT scanning analysis and processing on rock core samples. Background technique [0002] In the prior art, there are several methods for the physical research of rocks: [0003] Rock thin section research method: Use polarizing microscope to measure the mineral composition and optical properties of rock thin sections, and this method can determine the mineral types in rocks. This method has been widely used in the study of rock components, and has also formed related industry standards (such as identification of rock thin sections, SY / T 5368-2000); [0004] Computer cross-sectional scanning technology (abbreviated as CT): Industrial CT technology, namely industrial computerized tomography imaging technology, is a high-tech that emerged and developed rapidly in the 1980s. It can measure and calculate the density distribution of the section o...

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Application Information

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IPC IPC(8): G01N23/04G01N21/84G01N29/07
Inventor 周枫马中高赵群沈忠秋王辉明宗遐龄何晓冬
Owner CHINA PETROLEUM & CHEM CORP
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