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Title: Device and method for imaging of non-linear and linear properties of formations surrounding a borehole

Abstract

In some aspects of the disclosure, a method and an apparatus is disclosed for investigating material surrounding the borehole. The method includes generating a first low frequency acoustic wave within the borehole, wherein the first low frequency acoustic wave induces a linear and a nonlinear response in one or more features in the material that are substantially perpendicular to a radius of the borehole; directing a first sequence of high frequency pulses in a direction perpendicularly with respect to the longitudinal axis of the borehole into the material contemporaneously with the first acoustic wave; and receiving one or more second high frequency pulses at one or more receivers positionable in the borehole produced by an interaction between the first sequence of high frequency pulses and the one or more features undergoing linear and nonlinear elastic distortion due to the first low frequency acoustic wave to investigate the material surrounding the borehole.

Inventors:
; ; ; ; ;
Publication Date:
Research Org.:
LANL (Los Alamos National Laboratory (LANL), Los Alamos, NM (United States))
Sponsoring Org.:
USDOE
OSTI Identifier:
1107801
Patent Number(s):
8,576,661
Application Number:
12/893,530
Assignee:
Chevron U.S.A. Inc. (Sam Ramon, CA) LANL
DOE Contract Number:
AC52-06NA25396
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Johnson, Paul A, Tencate, James A, Le Bas, Pierre-Yves, Guyer, Robert, Vu, Cung Khac, and Skelt, Christopher. Device and method for imaging of non-linear and linear properties of formations surrounding a borehole. United States: N. p., 2013. Web.
Johnson, Paul A, Tencate, James A, Le Bas, Pierre-Yves, Guyer, Robert, Vu, Cung Khac, & Skelt, Christopher. Device and method for imaging of non-linear and linear properties of formations surrounding a borehole. United States.
Johnson, Paul A, Tencate, James A, Le Bas, Pierre-Yves, Guyer, Robert, Vu, Cung Khac, and Skelt, Christopher. Tue . "Device and method for imaging of non-linear and linear properties of formations surrounding a borehole". United States. doi:. https://www.osti.gov/servlets/purl/1107801.
@article{osti_1107801,
title = {Device and method for imaging of non-linear and linear properties of formations surrounding a borehole},
author = {Johnson, Paul A and Tencate, James A and Le Bas, Pierre-Yves and Guyer, Robert and Vu, Cung Khac and Skelt, Christopher},
abstractNote = {In some aspects of the disclosure, a method and an apparatus is disclosed for investigating material surrounding the borehole. The method includes generating a first low frequency acoustic wave within the borehole, wherein the first low frequency acoustic wave induces a linear and a nonlinear response in one or more features in the material that are substantially perpendicular to a radius of the borehole; directing a first sequence of high frequency pulses in a direction perpendicularly with respect to the longitudinal axis of the borehole into the material contemporaneously with the first acoustic wave; and receiving one or more second high frequency pulses at one or more receivers positionable in the borehole produced by an interaction between the first sequence of high frequency pulses and the one or more features undergoing linear and nonlinear elastic distortion due to the first low frequency acoustic wave to investigate the material surrounding the borehole.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 05 00:00:00 EST 2013},
month = {Tue Nov 05 00:00:00 EST 2013}
}

Patent:

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  • In some aspects of the disclosure, a method and an apparatus is disclosed for investigating material surrounding the borehole. The method includes generating within a borehole an intermittent low frequency vibration that propagates as a tube wave longitudinally to the borehole and induces a nonlinear response in one or more features in the material that are substantially perpendicular to a longitudinal axis of the borehole; generating within the borehole a sequence of high frequency pulses directed such that they travel longitudinally to the borehole within the surrounding material; and receiving, at one or more receivers positionable in the borehole, amore » signal that includes components from the low frequency vibration and the sequence of high frequency pulses during intermittent generation of the low frequency vibration, to investigate the material surrounding the borehole.« less
  • In some aspects of the disclosure, a method for creating three-dimensional images of non-linear properties and the compressional to shear velocity ratio in a region remote from a borehole using a conveyed logging tool is disclosed. In some aspects, the method includes arranging a first source in the borehole and generating a steered beam of elastic energy at a first frequency; arranging a second source in the borehole and generating a steerable beam of elastic energy at a second frequency, such that the steerable beam at the first frequency and the steerable beam at the second frequency intercept at amore » location away from the borehole; receiving at the borehole by a sensor a third elastic wave, created by a three wave mixing process, with a frequency equal to a difference between the first and second frequencies and a direction of propagation towards the borehole; determining a location of a three wave mixing region based on the arrangement of the first and second sources and on properties of the third wave signal; and creating three-dimensional images of the non-linear properties using data recorded by repeating the generating, receiving and determining at a plurality of azimuths, inclinations and longitudinal locations within the borehole. The method is additionally used to generate three dimensional images of the ratio of compressional to shear acoustic velocity of the same volume surrounding the borehole.« less
  • A system and method of characterizing properties of a medium from a non-linear interaction are include generating, by first and second acoustic sources disposed on a surface of the medium on a first line, first and second acoustic waves. The first and second acoustic sources are controllable such that trajectories of the first and second acoustic waves intersect in a mixing zone within the medium. The method further includes receiving, by a receiver positioned in a plane containing the first and second acoustic sources, a third acoustic wave generated by a non-linear mixing process from the first and second acousticmore » waves in the mixing zone; and creating a first two-dimensional image of non-linear properties or a first ratio of compressional velocity and shear velocity, or both, of the medium in a first plane generally perpendicular to the surface and containing the first line, based on the received third acoustic wave.« less
  • A multiple stage formation fracturing operation is conducted with separate radioactive tracer elements injected into the well during each stage of the fracturing operation. After completion of the fracturing operation the well is logged using natural gamma ray logging. The resulting signals are sorted into individual channels or energy bands characteristic of each separate radioactive tracer element. The results of the multiple stage fracturing operation are evaluated based on dispersement of the individual tracer elements.
  • A method and apparatus for establishing the rate at which fluid is transferred between a borehole and the surrounding formations in the course of moving drill string upward or downward in the borehole. A bell nipple is situated at the upper portion of the borehole. While tripping, drilling fluid is circulated into the borehole and exits through an outflow port in the bell nipple. The level of drilling fluid is maintained constant at the outflow port. Meters are provided to measure inflow and outflow rates. Circuitry is provided to establish the volume rate at which the amount of drill stringmore » within the borehole changes. The outputs of the meters and rate establishing means are summed to establish the compensated rate at which fluid is transferred between the formations and the borehole. This compensated rate is compared to an alarm limit. An alarm is activated if the compensated rate exceeds the alarm limit.« less