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Title: Time-reversed nonlinear acoustic downhole pore pressure measurements

Abstract

Apparatus (10) and methods for measurement of pore pressure in rock formations through a metal borehole casing (32) after a well is cased and cemented, are described. Such measurements may be accomplished by using the Dynamic Acoustic Elasticity (DAE) method for characterizing nonlinear parameters by perturbing a selected rock formation region with a High Amplitude, Low Frequency (HALF) acoustic strain wave, and probing this region using a Low Amplitude, High Frequency (LAHF) acoustic wave (18), (22). Time reversal techniques (36) may be employed for focusing acoustic energy into the formation in the vicinity of the pipe or open hole. The change in wave speed of the probe pulses as the HALF induced strain wave oscillation propagates through the formation, as a function of the induced strain, may be used to determine the nonlinear elastic parameters α, β, δ, and A of the pore pressure, from which the pore pressure may be determined in the region of the HALF wave.

Inventors:
; ; ; ; ;
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1840279
Patent Number(s):
11067711
Application Number:
16/343,975
Assignee:
Triad National Security, LLC (Los Alamos, NM); CHEVRON U.S.A. INC. (San Ramon, CA)
Patent Classifications (CPCs):
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
G - PHYSICS G01 - MEASURING G01H - MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Patent
Resource Relation:
Patent File Date: 03/26/2017
Country of Publication:
United States
Language:
English

Citation Formats

Goodman, Harvey E., Ulrich, II, Timothy James, Guyer, Robert A., Johnson, Paul A., Remillieux, Marcel C., and Le Bas, Pierre-Yves. Time-reversed nonlinear acoustic downhole pore pressure measurements. United States: N. p., 2021. Web.
Goodman, Harvey E., Ulrich, II, Timothy James, Guyer, Robert A., Johnson, Paul A., Remillieux, Marcel C., & Le Bas, Pierre-Yves. Time-reversed nonlinear acoustic downhole pore pressure measurements. United States.
Goodman, Harvey E., Ulrich, II, Timothy James, Guyer, Robert A., Johnson, Paul A., Remillieux, Marcel C., and Le Bas, Pierre-Yves. Tue . "Time-reversed nonlinear acoustic downhole pore pressure measurements". United States. https://www.osti.gov/servlets/purl/1840279.
@article{osti_1840279,
title = {Time-reversed nonlinear acoustic downhole pore pressure measurements},
author = {Goodman, Harvey E. and Ulrich, II, Timothy James and Guyer, Robert A. and Johnson, Paul A. and Remillieux, Marcel C. and Le Bas, Pierre-Yves},
abstractNote = {Apparatus (10) and methods for measurement of pore pressure in rock formations through a metal borehole casing (32) after a well is cased and cemented, are described. Such measurements may be accomplished by using the Dynamic Acoustic Elasticity (DAE) method for characterizing nonlinear parameters by perturbing a selected rock formation region with a High Amplitude, Low Frequency (HALF) acoustic strain wave, and probing this region using a Low Amplitude, High Frequency (LAHF) acoustic wave (18), (22). Time reversal techniques (36) may be employed for focusing acoustic energy into the formation in the vicinity of the pipe or open hole. The change in wave speed of the probe pulses as the HALF induced strain wave oscillation propagates through the formation, as a function of the induced strain, may be used to determine the nonlinear elastic parameters α, β, δ, and A of the pore pressure, from which the pore pressure may be determined in the region of the HALF wave.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {7}
}

Works referenced in this record:

Method and apparatus for measuring pore pressure beyond the casing
patent, September 2013


Measuring formation porosity and permeability
patent-application, October 2016


Methods and systems for low frequency seismic and infrasound detection of geo-pressure transition zones
patent-application, September 2004


Device and Method for Imaging of Non-Linear and Linear Properties of Formations Surrounding a Borehole
patent-application, March 2012


Method for borehole measurement of formation properties
patent-application, October 2002


Real-time velocity and pore-pressure prediction ahead of drill bit
patent-application, February 2005


Measurement of sound speed of downhole fluid utilizing tube waves
patent, November 2012


Method and Apparatus for Measuring Pore Pressure Beyond the Casing
patent-application, June 2011


Method for borehole measurement of formation properties
patent, December 2007


Measurement of sound speed of downhole fluid utilizing tube waves
patent-application, April 2009


Measuring formation porosity and permeability
patent, April 2019


Device and method for imaging of non-linear and linear properties of formations surrounding a borehole
patent, November 2013


Geopressure analysis system
patent, August 1994