Automatic identification method and system for different types of pores of mud shale

US11361193B2 · kind B2 · utility

Assignee

• Northeast Petroleum University · CN

Inventors

• Shansi Tian · Yuhui District, CN
• Bo Liu · Sichuan, CN
• Fang Zeng · Xing'an, CN
• Xiaofei Fu · Yuhui District, CN
• Zhiwei Hu · Dublin, US
• Ya'ao Chi · Xing'an, CN
• Haiyang Yan · Beijing, CN

Key dates

• Filing date: Jun 10, 2020
• Grant date: Jun 14, 2022
• Expiry date: Oct 3, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/20221
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for identifying mineral pore types in mud shale includes: determining an inorganic mineral pore image and a kerogen region image of a mud shale Scanning Electron Microscopy (SEM) gray-scale image; performing an expansion operation on the inorganic mineral pore image to obtain an expanded inorganic mineral pore image; comparing the inorganic mineral pore image with the expanded inorganic mineral pore image, and determining an extra region in the expanded inorganic mineral pore image as an expansion region; collecting statistics about the number of pixel points of a siliceous mineral, a calcareous mineral, and a clay mineral; calculating the proportion of each mineral according to the number of pixel points of the minerals; drawing a mineral pore triangular image chart according to the proportions of minerals; and determining the mineral type corresponding to the pores in the inorganic mineral pore image according to the mineral pore triangular image chart.