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41. 发明申请

US20070216416A1 Electromagnetic and Magnetostatic Shield To Perform Measurements Ahead of the Drill Bit 审中-公开
标题翻译：电磁和静电屏蔽在钻头前进行测量
公开(公告)号：US20070216416A1
公开(公告)日：2007-09-20
申请号：US11682381
申请日：2007-03-06
申请人： Gregory B. Itskovich
发明人： Gregory B. Itskovich
IPC分类号： G01V3/18
CPC分类号： G01V3/28
摘要： A transmitter on a bottomhole assembly (BHA) is used for generating a transient electromagnetic signal in an earth formation. A receiver on the BHA receives signals that are indicative of formation resistivity and distances to bed boundaries. A combination of electromagnetic shielding and magnetostatic shielding enables determination of distance to an interface ahead of the drillbit.
摘要翻译：井底组件（BHA）上的发射器用于在地层中产生瞬态电磁信号。 BHA上的接收器接收指示地层电阻率和与床边界距离的信号。电磁屏蔽和静磁屏蔽的组合使得能够确定到钻头前方的界面的距离。

42. 发明申请

US20170235012A1 METHOD AND APPARATUS FOR ESTIMATING FORMATION PROPERTIES USING TRANSIENT ELECTROMAGNETIC MEASUREMENTS WHILE DRILLING 审中-公开
公开(公告)号：US20170235012A1
公开(公告)日：2017-08-17
申请号：US15045808
申请日：2016-02-17
申请人： Gregory B. Itskovich , Sushant M. Dutta , Steven Allen Morris , Marina Nikitenko
发明人： Gregory B. Itskovich , Sushant M. Dutta , Steven Allen Morris , Marina Nikitenko
IPC分类号： G01V3/28 , E21B7/04 , E21B47/12 , E21B44/00 , G01V3/38 , E21B49/00
CPC分类号： G01V3/28 , E21B7/04 , E21B44/00 , E21B47/122 , E21B49/00 , G01V3/18 , G01V3/26 , G01V3/38
摘要： A method for estimating a property of an earth formation penetrated by a borehole, the method comprising generating a first transient electromagnetic fields with a transmitter on a carrier located outside of the borehole and receiving associated signals, calculating a bucking coefficient using the measured signals, conveying the carrier through a borehole, generating a second transient electromagnetic field and receiving associated signals, calculating, a bucked signal using the bucking coefficient and the downhole signals, calculating synthetic formation signals, calculating synthetic formations signals by applying a Duhamel's integral to the measured signals and the synthetic formation signals, calculating a synthetic bucked signal, and performing an inversion of a formation model to estimate a property of the formation such that an inverted synthetic bucked signal and an inverted bucked signal coincide within a predetermined range.

43. 发明申请

US20160178787A1 HYBRID IMAGE OF EARTH FORMATION BASED ON TRANSIENT ELECTROMAGNETC MEASUREMENTS 审中-公开
标题翻译：基于瞬态电磁测量的地震形成混合图像
公开(公告)号：US20160178787A1
公开(公告)日：2016-06-23
申请号：US14577663
申请日：2014-12-19
申请人： Fei Le , Gregory B. Itskovich , Marina N. Nikitenko
发明人： Fei Le , Gregory B. Itskovich , Marina N. Nikitenko
IPC分类号： G01V3/38 , G01V3/28
CPC分类号： G01V3/38 , G01V3/24 , G01V3/28
摘要： A method for imaging an earth formation includes estimating an apparent resistivity (AR) value and an apparent distance to a bedding plane (AD2B) value for each of a plurality of samples derived from measurements of a time-dependent transient electromagnetic signal, estimating an inversion-based resistivity value (IB-R) and an inversion-based distance to a bedding plane (IB-D2B) value at a first sample of each consecutive depth interval, wherein each depth interval includes a plurality of consecutive samples, and determining a difference between apparent values and the corresponding inversion-based values. The method further includes generating an image of the earth formation using the AR and AD2B values for the entire interval if the difference is less than a threshold value and generating an image of the earth formation using IB-R and IB-D2B values for the entire interval if the difference is greater than the threshold value.
摘要翻译：用于对地球成像进行成像的方法包括估计从时间相关的瞬时电磁信号的测量导出的多个样本中的每个样本的视电阻率（AR）值和与层平面（AD2B）值的表观距离，估计反演（IB-R）和基于与每个连续深度间隔的第一样本的层叠平面（IB-D2B）值的基于反演的距离，其中每个深度间隔包括多个连续样本，并且确定差异在表观值和相应的基于反演的值之间。该方法还包括：如果该差小于阈值，则使用全部间隔的AR和AD2B值来产生地层的图像，并且使用IB-R和IB-D2B值为整体生成地层的图像间隔如果差值大于阈值。

44. 发明授权

US09297921B2 DTEM with short spacing for deep, ahead of the drill bit measurements 有权
标题翻译： DTEM具有较短的间距深度，提前钻头测量
公开(公告)号：US09297921B2
公开(公告)日：2016-03-29
申请号：US13220363
申请日：2011-08-29
申请人： Gregory B. Itskovich , Arcady Reiderman , Michael B. Rabinovich , Sergey Martakov , Emma Iomdina
发明人： Gregory B. Itskovich , Arcady Reiderman , Michael B. Rabinovich , Sergey Martakov , Emma Iomdina
IPC分类号： G01V1/40 , G01V3/08 , G01V3/10 , G01V3/00 , G01V3/28 , E21B47/00 , E21B47/10 , E21B41/00
CPC分类号： G01V3/28 , E21B41/0092 , E21B47/00 , E21B47/10
摘要： A transmitter on a bottomhole assembly (BHA) is used for generating a transient electromagnetic signal in an earth formation. A processor estimates the distance to a resistivity interface using a signal produced by a receiver on the BHA. The transmitter-receiver distance may be less than 1 m. The estimation of the distance is done in real time using a thin conductive sheet approximation.
摘要翻译：井底组件（BHA）上的发射器用于在地层中产生瞬态电磁信号。处理器使用由BHA上的接收器产生的信号估计到电阻率界面的距离。发射机 - 接收机距离可能小于1米。距离的估计是使用薄导电片近似来实时实现的。

45. 发明申请

US20130024120A1 FORMATION RESISTIVITY IMAGER REDUCED LEAKAGE TO MANDREL 有权
标题翻译：形成电阻图像降低人为损失
公开(公告)号：US20130024120A1
公开(公告)日：2013-01-24
申请号：US13411814
申请日：2012-03-05
申请人： Gregory B. Itskovich , Stanislav Wilhelm Forgang , Assol Kavtorina
发明人： Alexandre N. Bespalov , Gregory B. Itskovich , Stanislav Wilhelm Forgang
IPC分类号： G01V3/38
CPC分类号： G01N33/24 , G01V3/20
摘要： A method of estimating a parameter of a formation contacting a borehole with an instrument that includes a mandrel and a pad includes providing a measurement voltage to the pad; applying a biasing voltage to the mandrel while the measurement voltage is applied to the pad; measuring a received current during at least a portion of time the measurement voltage is provided; and estimating the parameter based on the received current.
摘要翻译：估计接触井眼的地层与包括心轴和垫的仪器的参数的方法包括向所述垫提供测量电压; 当将测量电压施加到所述垫时，向所述心轴施加偏置电压; 在提供测量电压的至少一部分时间内测量接收电流; 并基于接收到的电流来估计该参数。

46. 发明授权

US08278930B2 Deep MWD resistivity measurements using EM shielding 有权
标题翻译：使用EM屏蔽的深MWD电阻率测量
公开(公告)号：US08278930B2
公开(公告)日：2012-10-02
申请号：US12434450
申请日：2009-05-01
申请人： Gregory B. Itskovich
发明人： Gregory B. Itskovich
IPC分类号： G01V3/18 , G01V3/26
CPC分类号： G01V3/28
摘要： Structure for deep MWD resistivity measurements suitable for both geo-steering and measurements ahead of the drill bit is disclosed. Alternating current is transmitted through a loop and an induction signal is measured by a two-coil bucking receiving system placed at some distance from the transmitter. To further reduce a parasitic effect of the currents in the pipe, a conductive copper shield wrapping around the pipe is used. The length of the shield is about one and one-half to two times longer than the longest transmitter/receiver spacing of the structure. The transmitter/receiver system is located in the center of the described electromagnetic shield.
摘要翻译：公开了适用于钻头之前的地理转向和测量的深MWD电阻率测量结构。交流电通过环路传输，感应信号由放置在离发射机一定距离处的双线圈降压接收系统测量。为了进一步降低管中的电流的寄生效应，使用围绕管道的导电铜屏蔽。屏蔽件的长度比结构的最长发射器/接收器间距大约一到二到二倍。发射机/接收机系统位于所述电磁屏蔽的中心。

47. 发明申请

US20120059586A1 DTEM With Short Spacing for Deep, Ahead of the Drill Bit Measurements 有权
标题翻译： DTEM具有较短的间距，深入钻头测量
公开(公告)号：US20120059586A1
公开(公告)日：2012-03-08
申请号：US13220363
申请日：2011-08-29
申请人： Gregory B. Itskovich , Arcady Reiderman , Michael B. Rabinovich , Sergey Martakov , Emma Iomdina
发明人： Gregory B. Itskovich , Arcady Reiderman , Michael B. Rabinovich , Sergey Martakov , Emma Iomdina
IPC分类号： G01V3/38 , G01V3/30
CPC分类号： G01V3/28 , E21B41/0092 , E21B47/00 , E21B47/10
摘要： A transmitter on a bottomhole assembly (BHA) is used for generating a transient electromagnetic signal in an earth formation. A processor estimates the distance to a resistivity interface using a signal produced by a receiver on the BHA. The transmitter-receiver distance may be less than 1 m. The estimation of the distance is done in real time using a thin conductive sheet approximation.
摘要翻译：井底组件（BHA）上的发射器用于在地层中产生瞬态电磁信号。处理器使用由BHA上的接收器产生的信号估计到电阻率界面的距离。发射机 - 接收机距离可能小于1米。距离的估计是使用薄导电片近似来实时实现的。

48. 发明申请

US20110063949A1 TDEM FORWARD FOCUSING SYSTEM FOR DOWNHOLE USE 有权
标题翻译： TDEM前向聚焦系统用于井下使用
公开(公告)号：US20110063949A1
公开(公告)日：2011-03-17
申请号：US12883638
申请日：2010-09-16
申请人： Gregory B. Itskovich
发明人： Gregory B. Itskovich
IPC分类号： G01V1/40
CPC分类号： G01V1/42
摘要： A method and apparatus for estimating a parameter of interest of an earth formation ahead of a carrier within borehole. The method including estimating one or more functions based on received signals that may reduce the sum of the signals received by a first receiver, and estimating the parameter of interest based on signals received by one or more additional receivers by applying the one or more functions and, if necessary, a defocusing factor, such that reception of information from downhole of a selected downhole location is enhanced relative to reception of information uphole from the selected location. The apparatus including two or more transmitters, two or more receivers, and a processor to estimate one or more functions, and, based on these functions, the parameter of interest.
摘要翻译：一种用于估计钻孔内的载体之前的地层的感兴趣参数的方法和装置。该方法包括基于接收到的信号估计一个或多个功能，所述接收信号可以减少由第一接收机接收的信号的总和，并且基于由一个或多个附加接收机接收的信号来估计感兴趣的参数，通过应用一个或多个功能和如果需要，散焦因子，使得相对于从所选择的位置到达的信息的接收，增加了从所选择的井下位置的井下接收信息。该装置包括两个或多个发射器，两个或更多个接收器，以及用于估计一个或多个功能的处理器，以及基于这些功能，所关注的参数。

49. 发明申请

US20100213943A1 METHOD FOR ACCENTUATING SIGNAL FROM AHEAD OF THE BIT 审中-公开
标题翻译：从位的前端识别信号的方法
公开(公告)号：US20100213943A1
公开(公告)日：2010-08-26
申请号：US12710438
申请日：2010-02-23
申请人： Daniel T. Georgi , Gregory B. Itskovich , Michael B. Rabinovich , Leonty A. Tabarovsky
发明人： Daniel T. Georgi , Gregory B. Itskovich , Michael B. Rabinovich , Leonty A. Tabarovsky
IPC分类号： G01V3/18
CPC分类号： G01V3/28 , G01V11/00 , G01V2210/6163 , G01V2210/6167
摘要： A method for estimating a property of a portion of an earth formation ahead of a borehole penetrating the formation, the method includes: conveying a logging tool through the borehole; receiving one or more first signals from a previous depth of the logging tool; constructing a model of the earth formation using the one or more first signals; predicting one or more second signals from the portion of the earth formation ahead of the borehole using the model; receiving one or more third signals from the portion of the earth formation ahead of the borehole; calculating a difference between the one or more third signals and the one or more second signals; and estimating the property from the difference.
摘要翻译：一种用于估计穿过地层的井眼之前的地层的一部分的性质的方法，所述方法包括：将测井工具传送通过所述钻孔; 从测井工具的先前深度接收一个或多个第一信号; 使用所述一个或多个第一信号构造地层的模型; 使用该模型预测来自钻孔前方的地层部分的一个或多个第二信号; 从钻孔前面的地层部分接收一个或多个第三信号; 计算所述一个或多个第三信号与所述一个或多个第二信号之间的差; 并从差异估算属性。

50. 发明申请

US20100134111A1 Method of Measuring and Imaging RXO (Near Wellbore Resistivity) Using Transient EM 有权
标题翻译：使用瞬态EM测量和成像RXO（近井孔电阻率）的方法
公开(公告)号：US20100134111A1
公开(公告)日：2010-06-03
申请号：US12325841
申请日：2008-12-01
申请人： Gregory B. Itskovich
发明人： Gregory B. Itskovich
IPC分类号： G01V3/00
CPC分类号： G01V3/28
摘要： A transient electromagnetic wave is generated using an electromagnetic instrument in a borehole. An apparent resistivity is estimated using a received signal responsive to the generated wave and further used to estimate a resistivity property of a fluid in the borehole.
摘要翻译：使用钻孔中的电磁仪器产生瞬态电磁波。使用响应于所产生的波的接收信号估计视电阻率，并进一步用于估计井眼中的流体的电阻率特性。

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