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Core CT image processing-based remaining oil micro-occurrence representing method

A CT image and micro-occurrence technology, which is applied in the field of oil reservoir and image processing, can solve the problems that the theory of occurrence and migration stays at the macro scale and the micro-mechanism has not been revealed, so as to achieve the effect of improving oil recovery

Inactive Publication Date: 2016-05-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

Prior to this, the microcosmic mechanism of oil-water distribution in high water-cut reservoirs was mostly studied qualitatively through experiments. Therefore, the theory of occurrence and migration obtained from the research still remained at the macroscopic scale, and many microcosmic mechanisms had not been revealed.

Method used

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  • Core CT image processing-based remaining oil micro-occurrence representing method
  • Core CT image processing-based remaining oil micro-occurrence representing method
  • Core CT image processing-based remaining oil micro-occurrence representing method

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Embodiment Construction

[0036] The present invention will be described in detail below through specific examples.

[0037] Such as figure 1 As shown, the microcosmic occurrence representation method of remaining oil based on core CT image processing of the present invention includes: processing of CT images, modeling of pores and throat networks on the basis of CT image processing, and quantification of microcosmic occurrence of remaining oil Statistical, state characterization of remaining oil microscopic occurrence.

[0038] exist figure 1 In , the processing of CT images includes:

[0039] (1) Mainly perform contrast enhancement and sharpening on the acquired image first;

[0040] (2) Perform appropriate interpolation operation on the sliced ​​image, and generate a new image by interpolation in the middle of the sliced ​​image to ensure that the distance between the image layers is equal to the resolution of the plane image;

[0041] (3) With the help of image segmentation technology, the pore...

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Abstract

The invention relates to the field of petroleum reservoir and image processing, in particular to a core CT image processing-based remaining oil micro-occurrence representing method. The method comprises the following steps: pre-processing of a CT image: carrying out CT image interpolation on the basis of three Lagrange interpolations; image segmentation and modification; CT image-based pore and throat network modeling and quantitative characterization of remaining oil micro-occurrence. According to the core CT image processing-based remaining oil micro-occurrence representing method, the steps of CT image pre-processing, image interpolation, image-based medium segmentation, core model three-dimensional reconstruction, pore / throat segmentation and pore / throat topological structure reconstruction are carried out to obtain the three-dimensional configurations of all the pores and throats as well as the topological connection relation among the three-dimensional configurations, and finally obtain the quantitative characterization of the remaining oil micro-occurrence.

Description

technical field [0001] The invention relates to the fields of petroleum reservoirs, image processing and the like, in particular to a microcosmic occurrence representation method of remaining oil based on core CT image processing. Background technique [0002] Because many macroscopic properties of the reservoir (such as permeability, capillary pressure, etc.) depend on its microstructure. Therefore, in order to achieve the development goal of greatly enhancing oil recovery, its theoretical research and technical development cannot only stay at the macro level, but must go deep into the storage and migration space of oil—the interior of porous media, from the micro level Research. [0003] Only by studying the essential issues that determine the macroscopic fluid flow phenomenon inside the porous medium (such as the influence of the topological distribution of the pore space on the fluid seepage, the distribution of the fluid in it and the mechanism of mutual influence, etc...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T3/40G06T7/00G06T17/05G06T17/20G06Q50/02
CPCG06Q50/02G06T3/4007G06T17/05G06T17/20G06T5/73G06T5/90
Inventor 宫法明窦瑞华宫文娟陈彤张雪娜
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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