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A Method for Measuring the Maturity of Organic Matter in Rock Samples

A measurement method and organic matter technology, which is applied in the direction of color/spectral characteristic measurement, etc., can solve the problems that the principle and method of measuring reflectance stick to the old rules, the repeatability of test results is not high, and the operation process is cumbersome and unchanged, so as to achieve convenient result inspection , The implementation method is convenient and easy, and the effect of sample observation is intuitive

Active Publication Date: 2019-04-02
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Since 1932, Hoffman and Jankner first used the Barrick linear photometer to study coal and found that the reflectance of vitrinite is related to coal rank. The test equipment for measuring reflectance has been continuously improved, and the application of reflectance It has expanded accordingly, but the principle and method of measuring reflectivity have been sticking to the stereotypes, and the operation process is cumbersome and unchanged, susceptible to external interference, and the repeatability of the test results is not high

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  • A Method for Measuring the Maturity of Organic Matter in Rock Samples
  • A Method for Measuring the Maturity of Organic Matter in Rock Samples
  • A Method for Measuring the Maturity of Organic Matter in Rock Samples

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Embodiment Construction

[0033] Generally speaking, for the thermal evolution process of organic matter, as the degree of thermal evolution increases and the maturity of organic matter increases, the chemical composition of vitrinite will change accordingly, and the reflection color under the microscope will gradually become brighter. This point is consistent with the gray-level concept of digital images in the gray-scale image technology widely used in the fields of aerial remote sensing and medicine. Generally, the higher the maturity of organic matter, the larger the reflectance of vitrinite, the brighter the reflection color, the whiter the gray scale, and the larger the gray value; on the contrary, the lower the maturity of organic matter, the smaller the reflectance of vitrinite, and the smaller the reflection color. The darker it is, the darker the grayscale and the smaller the grayscale value. Therefore, under the premise of a certain incident light intensity, the difference in gray scale of v...

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Abstract

The invention provides a measurement method of organic substance maturity of rock samples. The method includes the steps of: 1) acquiring a gray scale image of organic substances in a geological sample through digital image technology; 2) analyzing and processing gray scale level of the organic substances in the gray scale image, and according to the relationship between reflectivity and gray scale value of a standard substance under the same measurement condition, calculating reflectivity distribution of a test zone in the gray scale image of the geological sample; and 3) according to the reflectivity distribution of the test zone in the gray scale image of the geological sample, calculating average value of the reflectivity of the test zone, thereby determining the organic substance maturity of the test zone. Compared with a conventional test method, the method is more intuitive in sample observation and is more accurate in determination of the maturity, and has more convenience in result inspection.

Description

technical field [0001] The invention relates to a method for measuring rock sample parameters in oil and gas geological experiments, in particular to a method for measuring the maturity of organic matter in whole rock samples of source rocks such as carbonate rock, mudstone, shale, coal, or kerogen samples enriched in these rocks Measurement methods. Background technique [0002] Vitrinite reflectance is an important parameter to characterize the maturity of organic matter in rock samples. Typically, vitrinite reflectance is determined by measuring the ratio of the intensity of light reflected from the surface of the vitrinite to the intensity of incident light. In the prior art, it is usually based on the photoelectric effect, under a reflection microscope with a certain incident light intensity, compare the photoelectric signal value (photomultiplier tube) between the vitrinite in the sample and the standard substance of known reflectance to determine the sample reflecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/27
Inventor 仰云峰申宝剑鲍芳许锦曹婷婷
Owner CHINA PETROLEUM & CHEM CORP
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