公开(公告)号：US20180100387A1

公开(公告)日：2018-04-12

申请号：US15288092

申请日：2016-10-07

Applicant: BAKER HUGHES INCORPORATED

Inventor： BABAK KOUCHMESHKY ,  XIAOCHU YAO ,  STANISLAV FORGANG ,  PAWEL J. MATUSZYK ,  MARC S. RAMIREZ ,  OTTO N. FANINI ,  DOUGLAS J. PATTERSON ,  VIMAL SHAH

IPC: E21B47/09 ,  B06B1/04 ,  G01N29/24 ,  G01N29/28 ,  G01N29/34 ,  G01V1/52 ,  E21B47/16

CPC classification number: E21B47/091 ,  B06B1/04 ,  B06B1/045 ,  E21B47/16 ,  G01N29/2412 ,  G01N29/28 ,  G01N29/34 ,  G01N2291/0421 ,  G01N2291/0422 ,  G01N2291/0423 ,  G01N2291/0427 ,  G01V1/52

Abstract: Systems, devices, and methods for estimating a value of a downhole parameter of interest. Aspects include an apparatus for evaluating a tubular. The apparatus may include a sensor including an electromagnetic acoustic transducer (EMAT) device configured to be conveyed into the tubular. The EMAT device may include measurement circuitry comprising at least one conductive coil; and a magnet array comprising magnets arranged with a corresponding direction of magnetization of each magnet oriented according to a configuration producing a greater magnetic flux on a first side of the array than on a second side opposing the first side. The magnetic flux produced from the second side may be substantially zero. In embodiments, the configuration of magnets comprises at least a first set of permanent magnets in a linear Halbach configuration.

公开(公告)号：US20160363686A1

公开(公告)日：2016-12-15

申请号：US14738224

申请日：2015-06-12

Applicant: BAKER HUGHES INCORPORATED

Inventor： BABAK KOUCHMESHKY ,  OTTO N. FANINI ,  STANISLAV W. FORGANG

IPC: G01V3/38 ,  G01V3/30 ,  H01Q11/10

CPC classification number: G01V3/38 ,  G01V3/30 ,  H01Q1/04 ,  H01Q7/00 ,  H01Q11/10 ,  H01Q21/24

Abstract: This disclosure describes a dielectric logging tool for evaluating the earth formation using at least one transmitter antenna disposed in a cavity on a pad engaged with a borehole wall. The logging tool may comprise at least one power driver in electrical communication with the at least one transmitter antenna and configured to modulate a phase of output current of the at least one power driver. The logging tool may enforce symmetric current on both feeds of the at least one transmitter antenna causing a point of symmetry of the current to align with an axis of geometric symmetry of the at least one transmitter antenna. A parameter of interest of the formation may be estimated by using the attenuation and phase difference between the received and transmitted signals or between received signals from spaced receivers.

Abstract translation: 本公开描述了一种用于使用设置在与钻孔壁接合的垫上的腔中的至少一个发射器天线来评估地层的介电测井工具。 测井工具可以包括与至少一个发射机天线电通信的至少一个功率驱动器，并被配置成调制至少一个功率驱动器的输出电流的相位。 测井工具可以在至少一个发射机天线的两个馈电上施加对称电流，使得电流的对称点与至少一个发射器天线的几何对称轴对准。 可以通过使用接收和发送的信号之间的衰减和相位差或者来自间隔的接收器的接收信号来估计地层感兴趣的参数。

公开(公告)号：US20180203151A1

公开(公告)日：2018-07-19

申请号：US15406308

申请日：2017-01-13

Applicant: BAKER HUGHES INCORPORATED

Inventor： BABAK KOUCHMESHKY ,  OTTO N. FANINI ,  ALBERTO MEZZATESTA

IPC: G01V3/26 ,  G01V3/38

CPC classification number: G01V3/26 ,  G01V3/30 ,  G01V3/38

Abstract: Methods and apparatus for evaluating an earth formation intersected by a borehole. Methods include using at least one transmitter to generate electromagnetic (EM) waves propagating through the formation; generating measurement signals at at least one receiver responsive to the propagating EM waves; taking a plurality of propagation measurements from the measurement signals representative of the propagating EM waves, where each propagation measurement of the plurality comprises at least one of: i) a relative phase shift between a first wave of the plurality of propagating EM waves and a second wave of the plurality of propagating EM waves; and ii) a relative attenuation between a first wave of the plurality of propagating EM waves and a second wave of the plurality of propagating EM waves; and performing a single inversion which uses the plurality of propagation measurements as input and generates at least one petrophysical parameter as output.

公开(公告)号：US20170102479A1

公开(公告)日：2017-04-13

申请号：US15280815

申请日：2016-09-29

Applicant: BAKER HUGHES INCORPORATED

Inventor： BABAK KOUCHMESHKY ,  OTTO N. FANINI

IPC: G01V3/30 ,  E21B47/12 ,  H04Q9/12

CPC classification number: G01V3/30 ,  E21B47/01 ,  E21B47/02216 ,  E21B47/082 ,  E21B47/102 ,  E21B47/122 ,  E21B47/14 ,  H04Q9/12

Abstract: Systems, methods, and devices for evaluation of an earth formation intersected by a borehole using a logging tool. Methods include exciting an upper and lower transmitter; receiving signals at a plurality of receivers between the upper and lower transmitter; estimating a phase shift attributable to a volume of interest of the formation adjacent to a section of the carrier corresponding to the plurality of receivers by estimating phase shifts attributable only to portions of the volume of interest adjacent to corresponding portions of the section between each adjacent pair of receivers of the plurality of receivers; wherein each adjacent pair is positioned at a corresponding distance that is no more than half of the shortest wavelength of those wavelengths associated with the received signals. Estimating a phase shift between an adjacent pair of receivers may be carried out using a first relative phase value; and a second relative phase value.