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1. 发明申请

US20050030059A1 Multi-frequency focusing for MWD resistivity tools 有权
公开(公告)号：US20050030059A1
公开(公告)日：2005-02-10
申请号：US10934596
申请日：2004-09-03
申请人： Leonty Tabarovsky , Alexandre Bespalov , Stanislav Forgang , Michael Rabinovich
发明人： Leonty Tabarovsky , Alexandre Bespalov , Stanislav Forgang , Michael Rabinovich
IPC分类号： G01V3/28 , G01V1/40
CPC分类号： G01V3/28
摘要： An induction logging tool is used on a MWD bottom hole assembly. Due to the finite, nonzero, conductivity of the mandrel, conventional multi frequency focusing (MFF) does not work. A correction is made to the induction logging data to give measurements simulating a perfectly conducting mandrel. MFF can then be applied to the corrected data to give formation resistivities.

2. 发明申请

US20060103389A1 High-frequency induction imager with concentric coils for MWD and wireline applications 有权
标题翻译：高频感应成像仪，同轴线圈用于MWD和有线应用
公开(公告)号：US20060103389A1
公开(公告)日：2006-05-18
申请号：US11220440
申请日：2005-09-07
申请人： Alexandre Bespalov , Michael Rabinovich , Leonty Tabarovsky , Stanislav Forgang
发明人： Alexandre Bespalov , Michael Rabinovich , Leonty Tabarovsky , Stanislav Forgang
IPC分类号： G01V3/18
CPC分类号： E21B47/0002 , G01V3/18 , G01V3/28 , G01V3/30
摘要： An induction logging tool having concentric transmitter and receiver antennas can be used to make measurements of earth formations at frequencies up to 500 MHz. The antennas may be mounted on the mandrel of a bottomhole assembly for MWD applications, or may be pad mounted for wireline applications. Litz winding is used in the coils to minimize eddy current losses. The antennas may be formed on a flexible circuit board.
摘要翻译：具有同心发射器和接收器天线的感应测井工具可用于在高达500MHz的频率下测量地层。天线可以安装在用于MWD应用的井底组件的心轴上，或者可以用于有线应用的垫安装。线圈中使用Litz绕组以最小化涡流损耗。天线可以形成在柔性电路板上。

3. 发明申请

US20070152671A1 Two-axial pad formation resistivity imager 有权
标题翻译：双轴焊垫形成电阻率成像仪
公开(公告)号：US20070152671A1
公开(公告)日：2007-07-05
申请号：US11321132
申请日：2005-12-29
申请人： Gregory Itskovich , Randy Gold , Alexandre Bespalov , Stanislav Forgang
发明人： Gregory Itskovich , Randy Gold , Alexandre Bespalov , Stanislav Forgang
IPC分类号： G01V3/00
CPC分类号： G01V3/24
摘要： A resistivity imaging device injects currents in two orthogonal directions using two pairs of return electrodes and performing impedance measurements of the buttons placed between the returns.
摘要翻译：电阻率成像装置使用两对返回电极在两个正交方向上注入电流，并对放置在返回点之间的按钮执行阻抗测量。

4. 发明授权

US5781436A Method and apparatus for transverse electromagnetic induction well logging 失效
标题翻译：横向电磁感应测井方法和装置
公开(公告)号：US5781436A
公开(公告)日：1998-07-14
申请号：US686848
申请日：1996-07-26
申请人： Stanislav Forgang , Otto N. Fanini , Leonty A. Tabarovsky
发明人： Stanislav Forgang , Otto N. Fanini , Leonty A. Tabarovsky
IPC分类号： E21B41/00 , G01V3/28 , G06F19/00
CPC分类号： G01V3/28 , E21B2041/0028
摘要： A method of measuring the conductivity of earth formations penetrated by a wellbore. The method comprises selectively passing an alternating current through transmitter coils inserted into the wellbore. Each of the transmitter coils has a magnetic moment direction different from the magnetic moment direction of the other ones of the transmitter coils. The alternating current includes a first and a second frequency. The amplitude at the first frequency has a predetermined relationship to the amplitude at the second frequency. The relationship corresponds to the first and the second frequencies. The method includes selectively receiving voltages induced in a receiver coil having a sensitive direction substantially parallel to the axis of the corresponding transmitter coil through which the alternating current is passed. A difference in magnitudes between a component of the received voltage at the first frequency and a component of the voltage at the second frequency is measured, and conductivity is calculated from the difference in magnitudes of the components of the received voltage at the two frequencies. In a preferred embodiment, the step of measuring the difference in magnitudes between the voltage components at the two frequencies includes extracting digital signal samples of the received voltage at predetermined times with respect to a cycle of the transmitter current at the first frequency.
摘要翻译：测量井眼穿透的地层导电性的方法。所述方法包括选择性地使交流电流通过插入到井筒中的发射器线圈。每个发射器线圈具有与其他发射器线圈的磁矩方向不同的磁矩方向。交流电流包括第一和第二频率。第一频率处的振幅与第二频率处的振幅具有预定的关系。该关系对应于第一和第二频率。该方法包括有选择地接收在接收器线圈中感应的电压，该接收器线圈具有基本上平行于相应发射器线圈的轴线的敏感方向，交流电通过该轴线。测量第一频率的接收电压的分量与第二频率处的电压分量之间的幅度差，并根据两个频率处的接收电压的分量的大小差来计算导电率。在优选实施例中，测量两个频率的电压分量之间的幅度差的步骤包括相对于第一频率处的发射机电流的周期，以预定的时间提取接收电压的数字信号样本。

5. 发明授权

US5646561A High performance current switch for borehole logging tools 失效
标题翻译：用于钻孔测井工具的高性能电流开关
公开(公告)号：US5646561A
公开(公告)日：1997-07-08
申请号：US575626
申请日：1995-12-20
申请人： Otto N. Fanini , Stanislav Forgang
发明人： Otto N. Fanini , Stanislav Forgang
IPC分类号： H03K17/687 , H03K17/64 , H03K17/56
CPC分类号： H03K17/6877
摘要： A current switch for borehole logging tools operating at high temperatures with high load currents, which includes a driver unit that responds to an input digital control signal by holding an output field effect transistor in a turn-off state until its gate electrode is fully charged before allowing the transistor to supply current to an inductive or acoustic load, and by effecting a rapid discharge of the gate electrode to turn the transistor off. A digital coupler is inserted between the source of the input digital control signal and the driver unit to electrically decouple the load current from the source. The effects of spurious noise contaminants including power spikes in the load, fly-back coupling, and Miller's capacitance thereby are minimized and a switching action with minimal transition time is achieved. The current switch is particularly adaptable for use in a complementary-symmetric circuit for a bi-directional switch that causes current to flow first in one direction, and then in the opposite direction through the load with minimal cross propagation of noise.
摘要翻译：一种用于钻井测井工具的电流开关，其工作在高负载电流的高温下，其包括驱动器单元，其通过将输出场效应晶体管保持在关断状态来响应输入数字控制信号，直到其栅电极完全充电允许晶体管将电流提供给感应或声学负载，并且通过实现栅电极的快速放电以使晶体管截止。数字耦合器插入在输入数字控制信号的源极和驱动器单元之间，以将负载电流与源电耦合。包括负载中的功率尖峰，飞回耦合和米勒电容的杂散噪声污染物的影响被最小化，并且实现了具有最小转换时间的开关动作。电流开关特别适用于用于双向开关的互补对称电路，其导致电流首先在一个方向上流动，然后以相反的方向通过负载以最小的噪声交叉传播。

6. 发明授权

US11747506B2 Dual range micro-resistivity measurement method 有权
公开(公告)号：US11747506B2
公开(公告)日：2023-09-05
申请号：US17392851
申请日：2021-08-03
申请人： Youssef Boulaknadal , Stanislav Forgang , Peter Withers
发明人： Youssef Boulaknadal , Stanislav Forgang , Peter Withers
IPC分类号： G01V3/24 , G01V3/28 , G01V3/38 , E21B49/00
CPC分类号： G01V3/24 , G01V3/28 , G01V3/38 , E21B49/00
摘要： A resistivity imaging device and a method of operating the resistivity imaging device in a wellbore. The resistivity imaging device includes a first electrode, a second electrode, and a circuit electrically coupled to the first electrode and the second electrode. An impedance is measured of a formation surrounding the wellbore. Based on the impedance, the circuit is configured into one of a first circuit configuration for operating the resistivity imaging device in a first mode and a second circuit configuration for operating the resistivity imaging device in a second mode. The resistivity imaging device is operated using the circuit in the one of the first circuit configuration and the second circuit configuration.

7. 发明申请

US20070257679A1 Method and Apparatus for a Multi-component Induction Instrument Measuring System for Geosteering and Formation Resistivity Data Interpretation in Horizontal, Vertical and Deviated Wells 有权
标题翻译：用于水平，垂直和偏斜井的地质导向和形成电阻率数据解释的多组分感应仪器测量系统的方法和装置
公开(公告)号：US20070257679A1
公开(公告)日：2007-11-08
申请号：US11780364
申请日：2007-07-19
申请人： Otto Fanini , Stanislav Forgang , Berthold Kriegshauser , Liming Yu
发明人： Otto Fanini , Stanislav Forgang , Berthold Kriegshauser , Liming Yu
IPC分类号： G01V3/00 , G01V3/12
CPC分类号： G01V3/28
摘要： An improved induction tool for formation resistivity evaluations. The tool provides electromagnetic transmitters and sensors suitable for transmitting and receiving magnetic fields in radial directions that are orthogonal to the tool's longitudinal axis with minimal susceptibility to errors associated with parasitic eddy currents induced in the metal components surrounding the transmitter and receiver coils. Various transmitter receiver combinations are provided to select sensitivity to a desired reservoir formation properties, for example, different orientations xy, xz, yz, 20-40, 20-90, and combinations, such as, Symmetric-symmetric; Asymmetric-symmetric; and Asymmetric-asymmetric. Measurements made with a multi-component logging instrument when used in a substantially horizontal, vertical or deviated borehole in earth formations are diagnostic of the direction of resistive beds relative to the position of the borehole. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b)
摘要翻译：改进的地层电阻率评估感应工具。该工具提供电磁发射器和传感器，适用于在与工具的纵向轴线正交的径向方向上发射和接收磁场，对与发射器和接收器线圈周围的金属部件中感应的寄生涡流有关的误差的影响最小。提供各种发射器接收器组合以选择对期望的储层形成性质的灵敏度，例如不同取向xy，xz，yz，20-40,20-90以及诸如对称对称的组合; 不对称; 和非对称不对称。使用多组分测井仪器在地层中基本上水平，垂直或偏斜的钻孔中进行的测量是电阻床相对于钻孔位置的方向的诊断。要强调的是，该摘要被提供以符合要求摘要的规则，这将允许搜索者或其他读者快速确定技术公开的主题。提交它的理解是，它不会用于解释或限制权利要求的范围或含义。 37 CFR 1.72（b）

8. 发明申请

US20070205770A1 Method and Apparatus for Internal Calibration in Induction Logging Instruments 有权
标题翻译：感应测井仪器内部校准方法与装置
公开(公告)号：US20070205770A1
公开(公告)日：2007-09-06
申请号：US11685271
申请日：2007-03-13
申请人： Otto Fanini , Stanislav Forgang , Michael Crosskno
发明人： Otto Fanini , Stanislav Forgang , Michael Crosskno
IPC分类号： G01V3/28
CPC分类号： G01V3/28
摘要： The present invention improves measurement of the formation induction response in the presence of the primary magnetic field generated by a logging tool's transmitter. A structure is provided having a new combination of electrical and mechanical design features which provide logging tool for internal calibration and checking of antenna performance and characteristics before during and after well logging operations.
摘要翻译：本发明在由测井工具的发射器产生的初级磁场存在的情况下改进了地层感应响应的测量。提供了具有电气和机械设计特征的新组合的结构，其提供用于内部校准的测井工具以及在测井操作期间和之后检查天线性能和特性。

9. 发明申请

US20060103388A1 Method for compensating dielectric attenuation in downhole galvanic measurements 审中-公开
标题翻译：补偿井下电流测量中介质衰减的方法
公开(公告)号：US20060103388A1
公开(公告)日：2006-05-18
申请号：US10986096
申请日：2004-11-12
申请人： Stanislav Forgang , Gregory Itskovich , Randy Gold , Homero Castillo
发明人： Stanislav Forgang , Gregory Itskovich , Randy Gold , Homero Castillo
IPC分类号： G01V3/18
CPC分类号： G01V3/24
摘要： A method for estimating resistivity of a formation includes exciting an alternating current in the formation through non-conductive mud within a bore hole in the formation using a circuit. The circuit includes a known inductor and the non-conductive mud. A circuit response is measured. The complex impedance of the circuit is computed using the measured response to estimate the resistivity of the formation.
摘要翻译：用于估计地层电阻率的方法包括使用电路在地层的钻孔内的非导电泥浆中激发地层中的交流电流。该电路包括已知的电感器和非导电泥浆。测量电路响应。使用测量的响应来计算电路的复阻抗以估计地层的电阻率。

10. 发明授权

US5736637A Downhole multiphase flow sensor 失效
标题翻译：井下多相流量传感器
公开(公告)号：US5736637A
公开(公告)日：1998-04-07
申请号：US647631
申请日：1996-05-15
申请人： John T. Evans , Stanislav Forgang , Gregory B. Itskovich
发明人： John T. Evans , Stanislav Forgang , Gregory B. Itskovich
IPC分类号： E21B47/10 , G01F1/64 , G01F1/74 , G01N27/06 , G01N27/22 , E21B49/00
CPC分类号： E21B47/102 , G01F1/64 , G01F1/74 , G01N27/06 , G01N27/221
摘要： A system for evaluating multiphase flow of a fluid downhole in a borehole. Dielectric permittivity electrodes generate a capacitance output signal through the fluid, and conductivity electrodes generate a conductivity output signal through the fluid. The electrodes are powered with an AC generator operating at the same or different frequencies. The capacitance and conductivity output signals can be alternately generated by operating a controller, and such signals can be combined with a multiplexer engaged with the controller. The signal can be processed downhole or can be transmitted to a receiver positioned at the well surface for processing and interpretation of the multiphase data.
摘要翻译：一种用于评估钻孔中井下流体多相流的系统。介电常数电极通过流体产生电容输出信号，电导电极通过流体产生电导率输出信号。电极由相同或不同频率的交流发电机供电。可以通过操作控制器交替地产生电容和电导率输出信号，并且这些信号可以与与控制器接合的多路复用器组合。信号可以在井下处理，或者可以传输到位于井表面的接收器，用于处理和解释多相数据。

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