Device and method for evaluating gas-water two-phase flow fracture conductivity of fractured shale

US10837278B2 · kind B2 · utility

Assignee

• University of Science and Technology Beijing · CN

Inventors

• Weiyao Zhu · Beijing, CN
• Ming Yue · Beijing, CN
• Dongxu Ma · Beijing, CN
• Ziheng Zhou · Shanghai, CN
• Hongyan Han · Beijing, CN
• Zhiyong Song · Suzhou, CN
• Wenchao LIU · Miaocheng, CN

Key dates

• Filing date: Sep 6, 2018
• Grant date: Nov 17, 2020
• Expiry date: Oct 5, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N15/08
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device and a method for evaluating a gas-water two-phase flow fracture conductivity of a fractured shale. The device includes a seepage system, an injection system, a data collecting and processing system and a three-axis shale core holder, wherein the seepage system is subjected to two stages including a water injection stage and a gas flooding stage. When using the device, firstly the initial permeability and initial mass of the shale sample are determined; the water influx test is performed by injecting water to the shale sample until flow rate of the water discharged from the shale core is stable, then the water injection is ended. After the drying device is installed, the shale sample is subjected to gas flooding, and the aqueous fracturing fluid discharged by the gas flooding is collected until the flow meter determines that the gas volume is stable, and then the gas flooding is ended.