Horizontal fracture prediction method, device and equipment

US10677947B1 · kind B1 · utility

Assignee

• China University of Petroleum—Beijing · CN

Inventors

• Pinbo Ding · Beijing, CN
• Bangrang Di · Beijing, CN
• Jianxin Wei · Beijing, CN

Key dates

• Filing date: Aug 9, 2019
• Grant date: Jun 9, 2020
• Expiry date: Aug 9, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V2210/646
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present disclosure provides a horizontal fracture prediction method, device and equipment. The method comprises: acquiring primary wave velocities and shear wave velocities of first and second incidence angle directions of seismic waves at a target fracture location, wherein a first incidence angle is smaller than a second incidence angle, and the incidence angles are included angles between propagation directions of the seismic waves and a surface normal direction of a target fracture; calculating a first primary wave/shear wave velocity ratio and a first shear wave splitting (SWS) coefficient of the first incidence angle direction; calculating a second primary wave/shear wave velocity ratio of the second incidence angle direction; and determining that the target fracture is a horizontal fracture under the condition that the first SWS coefficient is smaller than a first preset value and a ratio of the first primary wave/shear wave velocity ratio to the second primary wave/shear wave velocity ratio is smaller than a second preset value. According to embodiments of the present disclosure, whether the target fracture is the horizontal fracture or not is determined through calcula…