Direct method for manufacturing large model fractured core and maintaining original oil-water saturation

US10746638B2 · kind B2 · utility

Assignee

• Southwest Petroleum University · CN

Inventors

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

Key dates

• Filing date: Dec 2, 2016
• Grant date: Aug 18, 2020
• Expiry date: Nov 24, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2001/366
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A direct method for manufacturing a large model fractured core and maintaining original oil-water saturation, including the following steps: (1) determining the volume V, porosity φ, permeability K, oil saturation So, water saturation Sw and the like of a fractured core to be manufactured; (2) preparing simulated oil, and determining the used oil mass mo=Vo×ρo; (3) under the circumstance of no consideration of oil saturation, acquiring the mass of the used water, cement and quartz sand; (4) while establishing oil saturation, acquiring the mass mw of water for manufacturing the core as mw=a−Vo×ρw; (5) mixing oil, water and an emulsifier evenly to prepare an oil-in-water emulsion; (6) adding cement and quartz sand into the emulsion and stirring evenly to obtain cement slurry; (7) when a cement sample is in a semi-solidified state, cutting the cement sample with a steel wire; and (8) solidifying the cement sample to the end.