Three-dimensional digital model generation method for building core model
A technology of three-dimensional digital and core model, applied in 3D modeling, image data processing, processing data acquisition/processing, etc., can solve the problem of insufficient core reproducibility, observability and pore simulation, and it is difficult to make two completely The same glass model, the randomness of corrosion traces of the glass model, etc.
Active Publication Date: 2022-01-11
CHINA PETROLEUM & CHEM CORP +1
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The glass model corroded by this method has certain randomness on the one hand, and it is difficult to make two identical glass models. On the other hand, due to the material of the glass model, it is difficult to make a larger model
[0007] In summary, the current experimental cores are still insufficient in terms of reproducibility, observability, and pore simulation.
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[0029] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.
[0030] Such as figure 1 as shown, figure 1 It is a flow chart of the method for generating a three-dimensional digital model for constructing a core model in the present invention.
[0031] Step 101: Use the real rock core CT end-face scan image as the original material; generally, the obtained original material is a grayscale image. That is, each pixel has an element, the value is between 0 and 255, 255 is white, and 0 is black.
[0032] Step 102: Binarize the image in step 101. The specific method is: specify a threshold, compare the pixel value in the image in step 101 with the threshold, when the pixel value is smaller than the threshold, replace the original pixel value with "0"; when the pixel value is greater than the threshold, use "1" Repl...
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The invention provides a method for generating a three-dimensional digital model for building a core model. The method for generating a three-dimensional digital model for building a core model includes: step 1, obtaining the original material of the three-dimensional digital model for building the core model; step 2 , perform binarization on the image obtained in step 1; step 3, search for pore points on the image processed in step 2, filter tiny pores, and connect the pores; step 4, normalize the image processed in step 3 Processing; step 5, expand the size of the image processed in step 4; step 6, perform three-dimensional processing on the image processed in step 5. The method for generating a three-dimensional digital model for constructing a core model can produce a model of a suitable size according to the research needs and the performance of the 3D printer, and can produce any number of core models with the same fracture structure as required. Using transparent printing materials, the produced models have observational.
Description
technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for generating a three-dimensional digital model for building a core model. Background technique [0002] During the development of oil and gas resources, the experimental research method is one of the commonly used methods in the study of the displacement of oil and gas resources in rock crevices, and core models are often used in experiments. According to different preparation methods, the current core models are divided into natural core models, artificial core models, and glass models. [0003] The natural rock model is obtained in nature, and the pore structure and distribution inside the rock are most similar to the reservoir. However, there are no two rocks with the same internal pore structure in nature. Even if two adjacent cores are taken from one rock, the internal pore structure and distribution of the cores are different. Therefore, when condu...
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IPC IPC(8): G06T17/00G06T17/05B29C64/386B33Y50/00
CPCG06T17/005G06T17/05B33Y50/00
Inventor于春磊许坚张以根张礼臻张民孙宝泉王曦贾丽华王胜贾刚王俊
OwnerCHINA PETROLEUM & CHEM CORP