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1. 发明申请

US20120069713A1 Imaging of Formation Structure Ahead of the Drill-Bit 有权
标题翻译：钻头前的形成结构成像
公开(公告)号：US20120069713A1
公开(公告)日：2012-03-22
申请号：US13210504
申请日：2011-08-16
申请人： Theodorus W. Geerits , Thomas Bohlen , Olaf Hellwig
发明人： Theodorus W. Geerits , Thomas Bohlen , Olaf Hellwig
IPC分类号： G01V1/00
CPC分类号： E21B47/00 , G01V1/48
摘要： The present disclosure is related to apparatuses and methods for downhole acoustic logging. The tool may be used for generating a guided borehole wave that propagates into the formation as a body wave, reflects from an interface, and is converted back into a a guided borehole wave. Guided borehole waves resulting from reflection of the body wave are used to image a reflector. Methods may include processing of acoustic logging signals including: wavefield separation, auto-correlation of wavefield components, filtering using a dip filter, and estimating a distance to the reflective interface.
摘要翻译：本公开涉及用于井下声波测井的装置和方法。该工具可以用于产生作为体波传播到地层中的导向井眼波，从界面反射并被转换成引导的井眼波。使用由身体波反射引起的导向井眼用于对反射镜进行成像。方法可以包括声学测井信号的处理，包括：波场分离，波场分量的自相关，使用浸滤器的滤波，以及估计到反射界面的距离。

2. 发明授权

US08811114B2 Imaging of formation structure ahead of the drill-bit 有权
标题翻译：形成结构的成像领先于钻头
公开(公告)号：US08811114B2
公开(公告)日：2014-08-19
申请号：US13210504
申请日：2011-08-16
申请人： Theodorus W. Geerits , Thomas Bohlen , Olaf Hellwig
发明人： Theodorus W. Geerits , Thomas Bohlen , Olaf Hellwig
IPC分类号： G01V1/44 , G01V1/48 , E21B47/00
CPC分类号： E21B47/00 , G01V1/48
摘要： The present disclosure is related to apparatuses and methods for downhole acoustic logging. The tool may be used for generating a guided borehole wave that propagates into the formation as a body wave, reflects from an interface, and is converted back into a guided borehole wave. Guided borehole waves resulting from reflection of the body wave are used to image a reflector. Methods may include processing of acoustic logging signals including: wavefield separation, auto-correlation of wavefield components, filtering using a dip filter, and estimating a distance to the reflective interface.
摘要翻译：本公开涉及用于井下声波测井的装置和方法。该工具可以用于产生作为体波传播到地层中的导向井眼波，从界面反射并被转换成导向的井眼波。使用由身体波反射引起的导向井眼用于对反射镜进行成像。方法可以包括声学测井信号的处理，包括：波场分离，波场分量的自相关，使用浸滤器的滤波，以及估计到反射界面的距离。

3. 发明授权

US08944183B2 Low frequency formation shear slowness from drilling noise derived quadrupole array data 有权
标题翻译：来自钻井噪声的四极阵列数据的低频形成剪切速度慢
公开(公告)号：US08944183B2
公开(公告)日：2015-02-03
申请号：US13198265
申请日：2011-08-04
申请人： Theodorus W. Geerits , Douglas J. Patterson
发明人： Theodorus W. Geerits , Douglas J. Patterson
IPC分类号： E21B47/00 , G01V1/48 , G01V1/28
CPC分类号： E21B47/00 , G01V1/284 , G01V1/48
摘要： The present disclosure is related to apparatuses and methods measuring and processing a characteristic of subsurface earth formations penetrated by a borehole. More specifically this present disclosure relates to a method and apparatus for measuring and processing an acoustic characteristic such as formation shear wave velocity of subsurface sonic waves after these waves traverse earth formations adjoining a borehole or passing through a portion of the subsurface. The apparatus may include: a bottomhole assembly, a drill bit configured to generate an acoustic signal, at least two acoustic detectors, and a processor. The acoustic signal may include a specific multipole signal that may propagate through an earth formation along the borehole. The method may include use of the apparatus, including steps for estimating a shear velocity of the acoustic signal using signals from the at least two acoustic detectors.
摘要翻译：本公开涉及测量和处理由钻孔穿透的地下地层的特征的装置和方法。更具体地，本公开涉及一种用于测量和处理声学特性的方法和装置，例如在这些波穿过邻接钻孔的地层或通过地下部分之后的地下声波的地层剪切波速度。该装置可以包括：井底组件，被配置为产生声信号的钻头，至少两个声检测器和处理器。声信号可以包括可沿着钻孔传播通过地层的特定多极信号。该方法可以包括使用该装置，包括使用来自至少两个声学检测器的信号来估计声信号的剪切速度的步骤。

4. 发明申请

US20130179082A1 Forward Elastic Scattering in Borehole Acoustics 有权
标题翻译：井眼声学中的前向弹性散射
公开(公告)号：US20130179082A1
公开(公告)日：2013-07-11
申请号：US13345510
申请日：2012-01-06
申请人： Theodorus W. Geerits
发明人： Theodorus W. Geerits
IPC分类号： G06F19/00
CPC分类号： G01V1/42
摘要： A method and computer-readable medium for determining a scattered wave particle velocity for a formation is disclosed. In aspects, the method may include: defining an embedded grid of the formation, and defining a contrast grid of the formation that includes a contrast feature of the formation; calculating a Green's function over the embedded grid; calculating a first scattering vector of the contrast feature for a first offset between the embedded grid and the contrast grid; determining the scattered wave particle velocity for the contrast feature at the first offset using the calculated Green's function and the first scattering vector; calculating a second scattering vector of the contrast feature for a second offset between the embedded grid and the contrast grid; and determining the scattered wave particle velocity for the contrast feature at the second offset is determined using the calculated Green's function and the second scattering vector.
摘要翻译：公开了一种用于确定地层的散射波粒子速度的方法和计算机可读介质。在方面中，该方法可以包括：定义地层的嵌入网格，并且定义地层的对比度网格，其包括地层的对比特征; 在嵌入式网格上计算绿色功能; 计算所述对比度特征的第一散射向量，用于所述嵌入网格和所述对比度网格之间的第一偏移; 使用所计算的格林函数和第一散射矢量确定第一偏移处的对比度特征的散射波粒子速度; 计算所述对比度特征的第二散射向量，用于所述嵌入网格和所述对比度网格之间的第二偏移; 并且使用所计算的格林函数和第二散射矢量来确定第二偏移处的对比度特征的散射波粒子速度。

5. 发明申请

US20120037423A1 Low Frequency Formation Shear Slowness From Drilling Noise Derived Quadrupole Array Data 有权
标题翻译：钻井噪声衍生的四极阵列数据的低频形成剪切缓慢
公开(公告)号：US20120037423A1
公开(公告)日：2012-02-16
申请号：US13198265
申请日：2011-08-04
申请人： Theodorus W. Geerits , Douglas J. Patterson
发明人： Theodorus W. Geerits , Douglas J. Patterson
IPC分类号： E21B47/14
CPC分类号： E21B47/00 , G01V1/284 , G01V1/48
摘要： The present disclosure is related to apparatuses and methods measuring and processing a characteristic of subsurface earth formations penetrated by a borehole. More specifically this present disclosure relates to a method and apparatus for measuring and processing an acoustic characteristic such as formation shear wave velocity of subsurface sonic waves after these waves traverse earth formations adjoining a borehole or passing through a portion of the subsurface. The apparatus may include: a bottomhole assembly, a drill bit configured to generate an acoustic signal, at least two acoustic detectors, and a processor. The acoustic signal may include a specific multipole signal that may propagate through an earth formation along the borehole. The method may include use of the apparatus, including steps for estimating a shear velocity of the acoustic signal using signals from the at least two acoustic detectors.
摘要翻译：本公开涉及测量和处理由钻孔穿透的地下地层的特征的装置和方法。更具体地，本公开涉及一种用于测量和处理声学特性的方法和装置，例如在这些波穿过邻接钻孔的地层或通过地下部分之后的地下声波的地层剪切波速度。该装置可以包括：井底组件，被配置为产生声信号的钻头，至少两个声检测器和处理器。声信号可以包括可沿着钻孔传播通过地层的特定多极信号。该方法可以包括使用该装置，包括使用来自至少两个声学检测器的信号来估计声信号的剪切速度的步骤。

6. 发明授权

US08125848B2 Acoustic logging-while-drilling tools having a hexapole source configuration and associated logging methods 有权
标题翻译：具有六极源配置和相关测井方法的声学测井同时钻孔工具
公开(公告)号：US08125848B2
公开(公告)日：2012-02-28
申请号：US11062395
申请日：2005-02-22
申请人： Theodorus W. Geerits , Batakrishna Mandal , Denis P. Schmitt
发明人： Theodorus W. Geerits , Batakrishna Mandal , Denis P. Schmitt
IPC分类号： G01V1/00
CPC分类号： G01V1/46 , Y10S367/911
摘要： Multipole acoustic logging-while-drilling (LWD) tools and associated methods are disclosed herein. In some embodiments, the disclosed acoustic LWD tool comprises a transmitter array and at least one receiver array. The transmitter array generates acoustic waves with an excitation pattern having a cutoff frequency greater than about 3 kHz. The receiver array is spaced apart from the transmitter array and is configured to detect said acoustic waves. Some of the disclosed method embodiments comprise: generating multipole acoustic waves in a fluid-filled borehole using an excitation pattern with a cutoff frequency greater than about 3 kHz; selectively detecting acoustic waves that propagate with said excitation pattern; and determining an acoustic shear wave slowness for a formation penetrated by the borehole.
摘要翻译：本文公开了多极声学测井同时钻探（LWD）工具和相关方法。在一些实施例中，所公开的声学LWD工具包括发射器阵列和至少一个接收器阵列。发射器阵列产生具有大于约3kHz的截止频率的激励图案的声波。接收器阵列与发射器阵列间隔开并且被配置为检测所述声波。所公开的方法实施例中的一些包括：使用截止频率大于约3kHz的激励模式在流体填充的钻孔中产生多极声波; 选择性地检测与所述激励图案一起传播的声波; 并确定由钻孔穿透的地层的声剪切波慢度。

7. 发明授权

US08868347B2 Forward elastic scattering in borehole acoustics 有权
标题翻译：井眼声学中的向前弹性散射
公开(公告)号：US08868347B2
公开(公告)日：2014-10-21
申请号：US13345510
申请日：2012-01-06
申请人： Theodorus W. Geerits
发明人： Theodorus W. Geerits
IPC分类号： G01V1/40 , G06F11/00
CPC分类号： G01V1/42
摘要： A method and computer-readable medium for determining a scattered wave particle velocity for a formation is disclosed. In aspects, the method may include: defining an embedded grid of the formation, and defining a contrast grid of the formation that includes a contrast feature of the formation; calculating a Green's function over the embedded grid; calculating a first scattering vector of the contrast feature for a first offset between the embedded grid and the contrast grid; determining the scattered wave particle velocity for the contrast feature at the first offset using the calculated Green's function and the first scattering vector; calculating a second scattering vector of the contrast feature for a second offset between the embedded grid and the contrast grid; and determining the scattered wave particle velocity for the contrast feature at the second offset is determined using the calculated Green's function and the second scattering vector.
摘要翻译：公开了一种用于确定地层的散射波粒子速度的方法和计算机可读介质。在方面中，该方法可以包括：定义地层的嵌入网格，并且定义地层的对比度网格，其包括地层的对比特征; 在嵌入式网格上计算绿色功能; 计算所述对比度特征的第一散射向量，用于所述嵌入网格和所述对比度网格之间的第一偏移; 使用所计算的格林函数和第一散射矢量确定第一偏移处的对比度特征的散射波粒子速度; 计算所述对比度特征的第二散射向量，用于所述嵌入网格和所述对比度网格之间的第二偏移; 并且使用所计算的格林函数和第二散射矢量来确定第二偏移处的对比度特征的散射波粒子速度。

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