Manufacturing method of big-model low-permeability microcrack core

US10364184B2 · kind B2 · utility

Assignee

• Southwest Petroleum University · CN

Inventors

• Ping Guo · Los Altos, US
• Shuai Wu · Waltham, US
• Yijian Chen · Nanhu, CN
• Huimin Zhang · Nanhu, CN
• Wanbo Zhang · Chengdu, CN
• Yuhong Du · Chengdu, CN
• Zhouhua Wang · Chengdu, CN
• Jianfen DU · Chengdu, CN
• Yisheng Hu · Chengdu, CN
• Huang Liu · Mechanicville, US
• Hongmei Ren · Chengdu, CN

Key dates

• Filing date: Feb 14, 2017
• Grant date: Jul 30, 2019
• Expiry date: Mar 10, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2001/2893
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A manufacturing method of a big-model low-permeability microcrack core includes: (1) determining the size of a microcrack core to be manufactured; (2) placing stones in a baking oven to bake for 24h under 120° C., placing the stones into a mixer, mixing and spraying oil, enabling the oil to seep into the stone, evenly forming a thin oil film on stone's surface; (3) mixing the oil sprayed stone with quartz sand and cement, adding water to mix evenly to obtain cement paste; (4) spreading butter on core mold's inner surface to form a thin butter film, pouring the cement paste into the core mold to obtain a cement sample; (5) loading confining pressure outside the core according to the requirements of porosity and permeability of the mold to adjust a pore permeability value; (6) obtaining the big-model core with microcrack after the cement sample is dried and formed.