Rock core microscopic various light spectrum image-forming information comprehensive processing method

Abstract

The invention discloses a comprehensive processing method of multi-spectral imaging information of core microscopy, which is used for comprehensively analyzing and processing the multi-spectral imaging data of the microscopic fluorescence, infrared and Raman of the core with oil in the geological logging of oil. At first, the color image of full color light of the polished section of the core is acquired with the fluorescence microscope; the three-spectral imaging analysis system of the microscopic fluorescence, infrared and Raman is then used for measuring the core sample in the geological logging to acquire the corresponding imaging ''spectral cube'' or spectral ''image cube''; the pixel level blending technology is used for data processing and comprehensive analysis of the three-spectral imaging information; a DWT is used for transforming; noise in the image is eliminated; the sub-images of each level are blended in a weighing way; the DWT is used for inverse transformation to acquire the blended multi-spectral image. The experiment has proven that the data blending technology of the spectral information of the image formed by multi microscopic spectra has higher practical value in the mineralogy, petrology and geochemistry of the core, when compared with each independent spectral imaging method.

Description

Technical field: [0001] The invention belongs to the technical field of petroleum geological exploration mud logging, in particular to a comprehensive analysis technique and method for the measurement and results of microscopic fluorescence, infrared and Raman spectral imaging of oil-bearing cores. Background technique: [0002] Mineralogical, petrological and geochemical research methods begin with observing, describing and identifying objects of interest. The classical techniques commonly used are optical microscopy and X-ray diffraction, supplemented by scanning or transmission electron microscopy and electron and ion beam analysis. However, these assays cannot distinguish between isoforms or determine partial order. Therefore, there is a need for an alternative microbeam approach that can both generate molecular fingerprints of samples and be used to study complex samples containing crystalline and amorphous materials. However, the spectroscopic (infrared, Raman, and f...

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Problems solved by technology

For example, conventional fluorescence detection, simultaneous fluorescence spectrum analysis, and three-dimensional fluorescence spectrum analysis in oil logging technology have certain limitations in the fluorescence analysis of core samples: usually, the petroleum hydrocarbons in the core are extracted in advance with a certain solvent substances, and their fluorescence spectroscopic analysis

This method destroys the original appearance of the rock, and cannot understand the important information necessary for evaluating oil, gas and water layers, such as the fabric information of the rock and the distribution of hydrocarbons in the rock; while the currently used fluorescence logging microscopic image Although the technology can more accurately observe the structure of the core and the distribution of hydrocarbon fluorescence, it still relies on the perception of the color and intensity of the fluorescence by the human eye or a true-color camera. This analysis method based on human color vision is not a complete spectrum analysis method. method, there is a fundamental shortcoming of metamerism, in order to obtain correct results, it is necessary to collect enough samples and establish a physical model

Similar to the fluorescence spectrum microprobe, in the existing work of infrared and Raman spectroscopic microprobe methods to study carbonaceous matter in rock cores, the experimental research is usually limited to tiny samples separated by complicated processing (such as cheese root) or individual sites in the sample, lack of research on the spatial distribution and interrelationship of components (or groups) in complex samples

In particular, methods for the unified and comprehensive analysis of microfluorescence, infrared, and Raman spectral imaging measurements of core samples have not been reported so far

This situation is far from meeting the needs of the further development of petroleum geological exploration logging technology.

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