skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Downhole nonlinear acoustics measurements in rock formations using dynamic acoustic elasticity and time reversal

Patent ·
OSTI ID:1824056
; ; ; ; ; ;

Apparatus and methods for measurement of pore pressure in rock formations through an open, or cemented and/or cased, borehole are described. Such measurements are achieved using the Dynamic Acoustic Elasticity (DAE) method for characterizing nonlinear parameters by perturbing a selected rock formation volume with a High Amplitude, Low Frequency (HALF) acoustic strain wave, and probing this volume using a Low Amplitude, High Frequency (LAHF) acoustic wave. Time reversal techniques may be employed for focusing acoustic energy Into the formation in the vicinity of the pipe or open hole.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Chevron USA, Inc., San Ramon, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-06NA25396
Assignee:
Triad National Security, LLC (Los Alamos, NM); Chevron U.S.A. Inc. (San Ramon, CA)
Patent Number(s):
11,029,435
Application Number:
16/343,969
OSTI ID:
1824056
Resource Relation:
Patent File Date: 10/24/2017
Country of Publication:
United States
Language:
English

References (11)

System and method for generating micro-seismic events and characterizing properties of a medium with non-linear acoustic interactions patent December 2015
Lightweight inflatable borehole receiver unit for seismic testing patent June 2011
Time-Reversed Nonlinear Acoustic Downhole Pore Pressure Measurements patent-application August 2019
Device and Method for Imaging of Non-Linear and Linear Properties of Formations Surrounding a Borehole patent-application March 2012
Measurement of nonlinear properties of formation using sonic borehole tool while changing pressure in borehole patent December 1995
Method and Apparatus for Determining Radial Shear Velocity Variation from Dipole Acoustic Logging patent-application December 2010
Acoustic Device for Localized Contactless Measurement of Elastic and Dissipative Non-Linearities and Viscoelasticity patent-application June 2011
Lightweight Inflatable Borehole Receiver Unit for Seismic Testing patent-application June 2011
Identification of stress induced anisotropy in formations patent March 1995
Integrated System for Investigating Sub-Surface Features of a Rock Formation patent-application May 2012
Fracture Characterization by Interferometric Drillbit Imaging, Time Reversal Imaging of Fractures Using Drill Bit Seismics, and Monitoring of Fracture Generation via Time Reversed Acoustics and Electroseismics patent-application May 2013

Similar Records

Related Subjects