公开(公告)号：US20110248716A1

公开(公告)日：2011-10-13

申请号：US13080242

申请日：2011-04-05

申请人： Martin Folberth

发明人： Martin Folberth

IPC分类号： G01V3/18

CPC分类号： G01V3/24 ,  Y02A90/342

摘要： An apparatus and method for estimating a resistivity property of an earth formation involving electric current injected into a wall of a borehole. The apparatus includes a first electrode, a second electrode, and a differential amplifier. The first electrode may be configured to impart an electric current into a borehole wall and be directly connected to a first input of the differential amplifier. The second electrode may be directly connected to a second input of the differential amplifier. The method may also include a summing circuit connected to the output of the differential amplifier. The method includes estimating a resistivity property using the output of the differential amplifier or the summing circuit.

摘要翻译： 一种用于估计涉及注入井眼壁的电流的地层的电阻特性的装置和方法。 该装置包括第一电极，第二电极和差分放大器。 第一电极可以被配置为将电流施加到井壁中并且直接连接到差分放大器的第一输入端。 第二电极可以直接连接到差分放大器的第二输入端。 该方法还可以包括连接到差分放大器的输出的求和电路。 该方法包括使用差分放大器或求和电路的输出来估计电阻率特性。

公开(公告)号：US20070029083A1

公开(公告)日：2007-02-08

申请号：US11496158

申请日：2006-07-31

申请人： Martin Folberth

发明人： Martin Folberth

IPC分类号： E21B47/00

CPC分类号： G01V3/24 ,  Y02A90/342

摘要： A galvanic resistivity tool with one or more measurement electrodes and guard electrodes, and one or more shielding electrodes. The impedance seen by the measurement electrode (indicative of the formation resistivity) is determined by using a directional coupler that measures a reflection coefficient of an electrical signal.

摘要翻译： 具有一个或多个测量电极和保护电极以及一个或多个屏蔽电极的电流电阻率工具。 通过使用测量电信号的反射系数的定向耦合器来确定由测量电极看到的阻抗（表示地层电阻率）。

公开(公告)号：US20060017443A1

公开(公告)日：2006-01-26

申请号：US11183139

申请日：2005-07-15

申请人： Martin Folberth ,  Sheng Fang ,  Tsili Wang

发明人： Martin Folberth ,  Sheng Fang ,  Tsili Wang

IPC分类号： G01V3/08

CPC分类号： G01V3/30

摘要： A resistivity logging tool suitable for downhole use includes a transmitter, two spaced apart receivers. The measured signals are inverted to determine the distance to a boundary in the earth formation in the presence of a transition zone in resistivity. The direction of drilling may be controlled based on the determined distance.

摘要翻译： 适用于井下使用的电阻率测井工具包括一个发射器，两个间隔开的接收器。 在存在电阻率过渡区时，测量的信号被反转以确定在地层中与边界的距离。 可以基于确定的距离来控制钻孔的方向。

公开(公告)号：US07679368B2

公开(公告)日：2010-03-16

申请号：US11496158

申请日：2006-07-31

申请人： Martin Folberth

发明人： Martin Folberth

IPC分类号： G01V3/18 ,  G01V3/20 ,  G01V3/02

CPC分类号： G01V3/24 ,  Y02A90/342

摘要： A galvanic resistivity tool with one or more measurement electrodes and guard electrodes, and one or more shielding electrodes. The impedance seen by the measurement electrode (indicative of the formation resistivity) is determined by using a directional coupler that measures a reflection coefficient of an electrical signal.

摘要翻译： 具有一个或多个测量电极和保护电极以及一个或多个屏蔽电极的电流电阻率工具。 通过使用测量电信号的反射系数的定向耦合器来确定由测量电极看到的阻抗（表示地层电阻率）。

公开(公告)号：US08258790B2

公开(公告)日：2012-09-04

申请号：US12274414

申请日：2008-11-20

申请人： Martin Folberth ,  Matthias Gorek ,  Eduard Kirchmeier

发明人： Martin Folberth ,  Matthias Gorek ,  Eduard Kirchmeier

IPC分类号： G01V3/10

CPC分类号： G01V3/28

摘要： An apparatus for evaluating an earth formation, the apparatus including: a logging tool configured to be conveyed through a borehole penetrating the earth formation; a coil inductively coupled to the earth formation, the coil being disposed at the logging instrument; and a circuit coupled to the coil wherein the circuit and the coil form an oscillator circuit, the oscillator circuit being configured to oscillate when a circuit parameter of the oscillator circuit satisfies an oscillation criterion, the circuit parameter being related to a property of the earth formation.

摘要翻译： 一种用于评估地层的装置，所述装置包括：测井工具，其构造成通过穿过所述地层的钻孔传送; 感应地耦合到地层的线圈，线圈设置在测井仪器处; 以及耦合到所述线圈的电路，其中所述电路和所述线圈形成振荡器电路，所述振荡器电路被配置为当所述振荡器电路的电路参数满足振荡标准时振荡，所述电路参数与所述地层的性质相关 。

公开(公告)号：US20100123461A1

公开(公告)日：2010-05-20

申请号：US12274414

申请日：2008-11-20

申请人： Martin Folberth ,  Matthias Gorek ,  Eduard Kirchmeier

发明人： Martin Folberth ,  Matthias Gorek ,  Eduard Kirchmeier

IPC分类号： G01V3/10 ,  G01V3/28

CPC分类号： G01V3/28

摘要： An apparatus for evaluating an earth formation, the apparatus including: a logging tool configured to be conveyed through a borehole penetrating the earth formation; a coil inductively coupled to the earth formation, the coil being disposed at the logging instrument; and a circuit coupled to the coil wherein the circuit and the coil form an oscillator circuit, the oscillator circuit being configured to oscillate when a circuit parameter of the oscillator circuit satisfies an oscillation criterion, the circuit parameter being related to a property of the earth formation.

摘要翻译： 一种用于评估地层的装置，所述装置包括：测井工具，其构造成通过穿过所述地层的钻孔传送; 感应地耦合到地层的线圈，线圈设置在测井仪器处; 以及耦合到所述线圈的电路，其中所述电路和所述线圈形成振荡器电路，所述振荡器电路被配置为当所述振荡器电路的电路参数满足振荡标准时振荡，所述电路参数与所述地层的性质相关 。

公开(公告)号：US20050006090A1

公开(公告)日：2005-01-13

申请号：US10616857

申请日：2003-07-08

申请人： Roland Chemali ,  Martin Folberth ,  Tsili Wang ,  Rene Ritter

发明人： Roland Chemali ,  Martin Folberth ,  Tsili Wang ,  Rene Ritter

IPC分类号： E21B17/10 ,  E21B47/00 ,  E21B47/01 ,  G01V3/30

CPC分类号： E21B17/1078 ,  E21B47/0002 ,  E21B47/01 ,  G01V3/30

摘要： The invention is a method and apparatus for determining an electrical property a formation surrounding a borehole with a measuring-while-drilling device. The apparatus an antenna configuration disposed along the outer face of an extendable stabilizer joined to a rotatable drill collar. Typically, two receivers and two transmitters are spaced along the longitudinal axis of the drill collar, with the two receivers spaced symmetrically in between the two transmitters. Alternatively, receivers and transmitters can be spaced along the circumference, possibly over multiple stabilizers. Multiple assemblies can be used. Data can be obtained with the transmitter-receiver assembly held in a stationary position or rotating circumferentially. Apparatus can be operated in a “broadside” configuration, an “endfire” configuration, or a configuration in which transmitter coils and receiver coils are oriented orthogonally to each other.

摘要翻译： 本发明是一种利用测量同步钻孔装置确定钻孔周围地层的电性能的方法和装置。 该装置沿着连接到可旋转钻铤的可延伸稳定器的外表面布置的天线结构。 通常，两个接收器和两个发射器沿着钻铤的纵向轴线间隔开，两个接收器在两个发射器之间对称地间隔开。 或者，接收器和发射器可以沿着圆周间隔开，可能在多个稳定器上。 可以使用多个装配。 数据可以通过收发机组件保持在静止位置或周向旋转来获得。 设备可以以“宽边”配置，“端火”配置或发射器线圈和接收器线圈彼此正交定向的配置来操作。

公开(公告)号：US20170139073A1

公开(公告)日：2017-05-18

申请号：US15349224

申请日：2016-11-11

申请人： Matthias Gorek ,  Martin Folberth ,  Eduard Kirchmeier

发明人： Matthias Gorek ,  Martin Folberth ,  Eduard Kirchmeier

IPC分类号： G01V3/28 ,  G01R15/16

CPC分类号： G01V3/28 ,  G01R15/165

摘要： A system for measuring electric characteristics of an earth formation includes a carrier configured to be disposed in an earth formation, and an inductive measurement assembly including an antenna configured to generate an oscillating magnetic field in the earth formation and measure a resistivity of the formation by detecting a signal in response to currents induced in the formation. The system also includes a capacitive measurement assembly including a capacitive measurement electrode configured to detect a signal in response to a measurement current injected into the formation, the capacitive measurement electrode disposed between the antenna and the formation and in a path of the magnetic field, the capacitive measurement electrode formed from a plurality of constituent electrodes that are electrically isolated from each other so as to prevent induction of eddy currents across the plurality of electrodes.

公开(公告)号：US20160032715A1

公开(公告)日：2016-02-04

申请号：US14446987

申请日：2014-07-30

申请人： Stephan Mueller ,  Ingo Roders ,  Martin Folberth ,  Kai Schoenborn

发明人： Stephan Mueller ,  Ingo Roders ,  Martin Folberth ,  Kai Schoenborn

IPC分类号： E21B47/12 ,  E21B17/00

CPC分类号： E21B47/122

摘要： A drillstring communications system includes one or more pipe segments, a communication sub coupled to the pipe segment that includes a communication sub antenna, and a leaky feeder antenna in communication with the communication sub antenna.

摘要翻译： 钻柱通信系统包括一个或多个管段，连接到包括通信子天线的管段的通信子，以及与通信子天线通信的泄漏馈线天线。

公开(公告)号：US08390295B2

公开(公告)日：2013-03-05

申请号：US12171401

申请日：2008-07-11

申请人： Matthias Gorek ,  Martin Folberth ,  Christian Fulda

发明人： Matthias Gorek ,  Martin Folberth ,  Christian Fulda

IPC分类号： G01V3/00

CPC分类号： G01V3/20

摘要： A system for measuring a resistivity parameter of an earth formation includes: at least one measurement electrode electrically connected to a first electrical source; at least one guard electrode; a shielding electrode interposed between the at least one guard electrode and the at least one measurement electrode, the shielding electrode being electrically connected to a second electrical source independent from the first electrical source, and the guard electrode being electrically connected to a third electrical source independent of the first and second electrical sources; at least one return electrode; insulators positioned between (i) the measurement electrode and the shielding electrode, (ii) the shielding electrode and the guard electrode and (iii) the measurement electrode, the guard electrode and the return electrode; and a processor configured to adjust at least one of the first electrical source and the second electrical source to minimize a current flow through the shielding electrode.

摘要翻译： 用于测量地层电阻率参数的系统包括：电连接到第一电源的至少一个测量电极; 至少一个保护电极; 屏蔽电极，插在所述至少一个保护电极和所述至少一个测量电极之间，所述屏蔽电极电连接到独立于所述第一电源的第二电源，并且所述保护电极电连接到第三电源， 的第一和第二电源; 至少一个返回电极; 位于（i）测量电极和屏蔽电极之间的绝缘体，（ii）屏蔽电极和保护电极，以及（iii）测量电极，保护电极和返回电极; 以及处理器，其被配置为调节所述第一电源和所述第二电源中的至少一个，以最小化通过所述屏蔽电极的电流。