公开(公告)号：US10551518B2

公开(公告)日：2020-02-04

申请号：US15269052

申请日：2016-09-19

Applicant: PETROLEO BRASILEIRO S.A.—PETROBRAS

Inventor： Candida Menezes de Jesus ,  Andre Luiz Martins Compan ,  Rodrigo Surmas

IPC: G01V1/48

Abstract: This invention relates to a method of correcting eccentricity of ultrasonic image profiles, measured along a section of rock, including the steps of measuring emitted amplitude values (A0) and measuring transit time values (tθ) of ultrasonic acoustic pulses emitted at a range of default angles (θ), where the amplitude measured at each angle (Aθ) is determined by an amplitude decay model in relation to the transit time (tθ) defined by Aθ=A0e−tθ/τIθ where τ is the decay correction factor; and Iθ is the reflection coefficient of the rock wall.