Lithofacies identification method and system for carbonate rocks

A carbonate rock and identification method technology, which is applied in the field of geological exploration, can solve problems such as large human factors, low identification efficiency, and inability to identify thin interbeds, so as to achieve accurate identification and improve identification efficiency.

Active Publication Date: 2020-08-11
PETROCHINA CO LTD
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Problems solved by technology

[0003] The above method uses conventional logging data to identify lithofacies. The biggest problem is that the resolution of conventional logging data is low. For thin layers, thin interbeds cannot be identified, and human factors are large, so the identification work efficiency is low.

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  • Lithofacies identification method and system for carbonate rocks
  • Lithofacies identification method and system for carbonate rocks
  • Lithofacies identification method and system for carbonate rocks

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[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0051] In view of the fact that the prior art cannot accurately identify the lithofacies of carbonate rocks and the work efficiency is low, the embodiment of the present invention provides a lithofacies identification method of carbonate rocks to accurately identify the lithofacies of carbonate rocks and improve the identification work. efficiency. The present invention will be described in detail below in conjunction with the accompanying drawings.

[0052] ...

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Abstract

The invention provides a lithofacies identification method and a lithofacies identification system of a carbonate rock. The lithofacies identification method of the carbonate rock comprises the following steps of obtaining a color image of the carbonate rock; according to the color image of carbonate rock, obtaining the gray image of carbonate rock; according to the gray image of carbonate rock, obtaining the binary image of carbonate rock; determining black pixels in the binary image according to pixel values of the binary image; according to the average value of the number of black pixels inthe binary image and the average value of the number of black pixels in the binary image, obtaining the rock structure number. The identification of carbonate rock facies according to rock structurenumber can accurately identify carbonate rock facies and improve the identification efficiency.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a method and system for identifying lithofacies of carbonate rocks. Background technique [0002] There are two main types of lithofacies logging identification methods for carbonate rocks: one is identification methods based on conventional logging data, including qualitative cross-plot identification methods, and quantitative mathematical statistics methods such as neural networks, support vector machines and methods such as fuzzy theory. The second is to use new logging technology data, such as electrical imaging logging to identify lithofacies, electrical imaging chart method, etc. [0003] The above method uses conventional well logging data to identify lithofacies. The biggest problem is that the resolution of conventional well logging data is low. For thin layers and thin interbeds, it cannot be identified, and human factors are large, so the identification work effi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/90
CPCG06T7/0004G06T7/90
Inventor 李昌沈安江郭庆新沈扬周进高李林王小芳张杰陈薇王鹏万
Owner PETROCHINA CO LTD
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