公开(公告)号：US20190250295A1

公开(公告)日：2019-08-15

申请号：US16343975

申请日：2017-03-26

申请人： TRIAD NATIONAL SECURITY, LLC ,  CHEVRON U.S.A. INC.

发明人： Harvey E. Goodman ,  Timothy J. ULRICH, II ,  Robert A. GUYER ,  Paul A. Johnson ,  Marcel C. REMILLIEUX ,  Pierre-Yves LE BAS

IPC分类号： G01V1/30 ,  E21B49/00 ,  E21B47/06

CPC分类号： G01V1/306 ,  E21B21/00 ,  E21B47/06 ,  E21B47/101 ,  E21B49/00 ,  G01H5/00 ,  G01N15/082 ,  G01N29/024 ,  G01N29/348 ,  G01N2291/02441 ,  G01N2291/02827 ,  G01V2210/6242 ,  G01V2210/6248

摘要： 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.

公开(公告)号：US11079505B2

公开(公告)日：2021-08-03

申请号：US16083441

申请日：2017-03-09

申请人： TRIAD NATIONAL SECURITY, LLC ,  CHEVRON U.S.A. INC.

发明人： Paul A. Johnson ,  Timothy J. Ulrich, II ,  Pierre-Yves Le Bas ,  Robert A. Guyer ,  Harvey E. Goodman ,  Marcel C. Remillieux

IPC分类号： G01V1/48 ,  G01V1/00 ,  G01V1/30

摘要： Apparatus (10) and methods for combining time reversal and elastic nonlinearity of formation materials for qualtitatively probing for over-pressured regions down hole in advance of a well drilling bit, to determine the distance to the over-pressured region, and for accurately measuring pore pressure downhole in a formation, are described. Classical and reciprocal time reversal methods may be utilized to achieve these measurements.

公开(公告)号：US11067711B2

公开(公告)日：2021-07-20

申请号：US16343975

申请日：2017-03-26

申请人： TRIAD NATIONAL SECURITY, LLC ,  CHEVRON U.S.A. INC.

发明人： Harvey E. Goodman ,  Timothy James Ulrich, II ,  Robert A. Guyer ,  Paul A. Johnson ,  Marcel C. Remillieux ,  Pierre-Yves Le Bas

IPC分类号： G01V1/00 ,  G01V1/30 ,  E21B47/06 ,  G01N29/024 ,  G01N15/08 ,  G01H5/00 ,  G01N29/34 ,  E21B47/107 ,  E21B49/00 ,  E21B21/00

摘要： 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.

公开(公告)号：US09360573B2

公开(公告)日：2016-06-07

申请号：US14092051

申请日：2013-11-27

申请人： Chevron U.S.A., Inc. ,  LOS ALAMOS NATIONAL SECURITY LLC

发明人： Cung Khac Vu ,  Kurt Toshimi Nihei ,  Paul A. Johnson ,  Robert A. Guyer ,  James A. Ten Cate ,  Pierre-Yves Le Bas ,  Carene S. Larmat

IPC分类号： G01V1/34 ,  G01V1/00

CPC分类号： G01V1/006 ,  G01V2210/12 ,  G01V2210/125 ,  G01V2210/127 ,  G01V2210/16 ,  G01V2210/588

摘要： 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 acoustic 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.

摘要翻译： 从非线性相互作用来表征介质的特性的系统和方法包括通过设置在第一线上的介质的表面上的第一和第二声源来产生第一和第二声波。 第一和第二声源是可控的，使得第一声波和第二声波的轨迹在介质内的混合区中相交。 该方法还包括通过位于包含第一和第二声源的平面中的接收器从由混合区中的第一和第二声波通过非线性混合处理产生的第三声波; 以及基于所接收的第三个方向，在大致垂直于所述表面并且包含所述第一线的第一平面中创建所述介质的非线性特性或压缩速度和剪切速度的第一比例或两者的第一二维图像 声波。