公开(公告)号：US5767680A

公开(公告)日：1998-06-16

申请号：US661497

申请日：1996-06-11

申请人： Carlos Torres-Verdin ,  Sheng Fang ,  Vladimir Druskin ,  Ian Bryant ,  Metin Karakas

发明人： Carlos Torres-Verdin ,  Sheng Fang ,  Vladimir Druskin ,  Ian Bryant ,  Metin Karakas

IPC分类号： E21B47/10 ,  E21B49/00 ,  G01V3/20 ,  G01L3/08 ,  G01L3/10 ,  E21B47/00

CPC分类号： G01V3/20 ,  E21B47/102 ,  E21B49/00

摘要： Inception of hydrocarbon extraction from a reservoir causes the oil-water interface to warp and cusp toward the extraction gates along a well. This invention proposes time-lapse DC/AC measurements with an array of permanently deployed sensors in order to detect and estimate the change in geometry and proximity of the oil-water interface as a result of production, and therefore as a function of time. The estimation is carried out with a parametric inversion technique whereby the shape of the oil-water interface is assumed to take the form of a three-dimensional surface describable with only a few unknown parameters. A nonlinear optimization technique is used to search for the unknown parameters such that the differences between the measured data and the numerically simulated data are minimized in a least-squares fashion with concomitant hard bound physical constraints on the unknowns. The proposed estimation procedure is robust in the presence of relatively high levels of noise and can therefore be used to anticipate deleterious water breakthroughs, as well as improve the efficiency with which the oil is produced from the reservoir.

摘要翻译： 从储层中提取烃的开始使得油 - 水界面沿井沿弯曲和尖端朝向萃取门。 本发明提出了具有永久部署的传感器阵列的延时DC / AC测量，以便检测和估计作为生产的结果的油 - 水界面的几何形状和接近度的变化，并因此作为时间的函数。 用参数反演技术进行估计，由此假设油 - 水界面的形状采取仅用几个未知参数描述的三维表面的形式。 使用非线性优化技术来搜索未知参数，使得测量数据和数值模拟数据之间的差异以最小二乘法最小化，同时伴随着未知数的硬限制物理约束。 所提出的估计程序在存在相对高的噪声水平的情况下是稳健的，因此可以用于预测有害的水突破，以及提高从储层产生油的效率。

公开(公告)号：US4578777A

公开(公告)日：1986-03-25

申请号：US512858

申请日：1983-07-11

申请人： Sheng Fang ,  Kameswara K. Rao

发明人： Sheng Fang ,  Kameswara K. Rao

IPC分类号： G11C17/00 ,  G11C16/02 ,  G11C16/04 ,  G11C16/10 ,  G11C11/34

CPC分类号： G11C16/10

摘要： A novel write circuit arrangement for an EEPROM type memory system operable in response to the difference between the information stored in each addressed cell and the information to the be stored therein during a writing cycle and writing information into only those addressed cells for which a difference exists regardless of whether the difference indicates to charge or discharge the cell. The arrangement also can simultaneously charge one cell of a byte while discharging another cell of the same byte.

摘要翻译： 一种用于EEPROM类型存储器系统的新型写入电路装置，其可响应于在写入周期期间存储在每个寻址的单元中的信息与要存储的信息之间的差异而工作，并将信息写入仅存在差异的寻址单元 无论差异是否表示对电池充电或放电。 该布置还可以同时对一个字节的一个单元进行充电，同时放电同一字节的另一个单元。

公开(公告)号：US09146332B2

公开(公告)日：2015-09-29

申请号：US13252019

申请日：2011-10-03

申请人： John Signorelli ,  Samuel Bell ,  Tsili Wang ,  Roland Edward Chemali ,  Sheng Fang

发明人： John Signorelli ,  Samuel Bell ,  Tsili Wang ,  Roland Edward Chemali ,  Sheng Fang

IPC分类号： G01V3/28

CPC分类号： G01V3/28

摘要： An antenna system for a downhole tool has an antenna that is configured to operate at a plurality of frequencies. The tuning circuit is on the interior of the tool and shielded from borehole fluids. The tuning circuit is coupled to the antenna by a transformer circuit.

摘要翻译： 用于井下工具的天线系统具有被配置为以多个频率操作的天线。 调谐电路位于工具的内部并与井眼液体隔绝。 调谐电路通过变压器电路耦合到天线。

公开(公告)号：US08164339B2

公开(公告)日：2012-04-24

申请号：US12135639

申请日：2008-06-09

申请人： Sheng Fang ,  Tsili Wang ,  Jack Signorelli ,  Roland E. Chemali

发明人： Sheng Fang ,  Tsili Wang ,  Jack Signorelli ,  Roland E. Chemali

IPC分类号： G01V3/18 ,  G01V3/20 ,  G01V3/28

CPC分类号： E21B47/01 ,  G01V3/30

摘要： An apparatus for measuring one or more earth formation properties during applications including formation evaluation and geosteering applications is provided. The apparatus includes: an elongated body; at least one recessed portion on a periphery of the elongated body; an electrically conductive coil forming a closed loop, at least a portion of the coil extending through the at least one recessed portion; and a u-shaped magnetically permeable and non-conductive material disposed between the coil and the at least one recessed portion, the u-shaped material partially surrounding the coil in the at least one recessed portion. A system for measuring one or more properties of an earth formation is also provided.

摘要翻译： 提供了一种用于在包括地层评估和地质导向应用的应用中测量一个或多个地层形成特性的装置。 该装置包括：细长体; 所述细长体的周边上的至少一个凹部; 形成闭环的导电线圈，所述线圈的至少一部分延伸穿过所述至少一个凹部; 以及设置在所述线圈和所述至少一个凹部之间的u形磁导和非导电材料，所述u形材料部分地围绕所述至少一个凹部中的所述线圈。 还提供了一种用于测量地层的一个或多个性质的系统。

公开(公告)号：US20120051189A1

公开(公告)日：2012-03-01

申请号：US13035098

申请日：2011-02-25

申请人： Jack Signorelli ,  Samuel R. Bell ,  Stanislav W. Forgang ,  Sheng Fang

发明人： Jack Signorelli ,  Samuel R. Bell ,  Stanislav W. Forgang ,  Sheng Fang

IPC分类号： G01V1/20

CPC分类号： G01V3/12 ,  G01V3/28 ,  G01V3/30

摘要： An apparatus for estimating a property of an earth formation penetrated by a borehole, apparatus including: a carrier configured to be conveyed through the borehole; a transducer disposed at the carrier and configured to transmit and/or receive electromagnetic energy into and/or from the earth formation to estimate the property; wherein the transducer includes a plurality of inductively coupled elements in a series, each element configured to transmit and/or receive electromagnetic energy and at least a first connection to a first element in the plurality and a second connection to a second element in the plurality with at least one of the first element and the second element being disposed between end transducer elements in the series.

摘要翻译： 一种用于估计由钻孔渗透的地层的性质的装置，包括：被构造成通过钻孔传送的载体; 设置在所述载体处并被配置为向所述地层中的和/或从所述地层发射和/或接收电磁能以估计所述性质的换能器; 其中所述换能器包括多个串联的感应耦合元件，每个元件被配置为传输和/或接收电磁能量，并且至少第一连接到所述多个中的第一元件，以及与所述多个元件中的第二元件的第二连接， 第一元件和第二元件中的至少一个设置在串联的端部换能器元件之间。

公开(公告)号：US20110068796A1

公开(公告)日：2011-03-24

申请号：US12883344

申请日：2010-09-16

申请人： Jack Signorelli ,  Sheng Fang ,  Samuel Bell

发明人： Jack Signorelli ,  Sheng Fang ,  Samuel Bell

IPC分类号： G01V3/08

CPC分类号： G01V3/30

摘要： An apparatus for estimating a property of an earth formation penetrated by a borehole, the apparatus having: a carrier configured to be conveyed through the borehole; a transmitter disposed at the carrier and configured to transmit electromagnetic energy at a first frequency into the formation; a first antenna disposed at the carrier and configured to receive electromagnetic signals from the formation as a result of the transmitted electromagnetic energy interacting with the formation; and an active filter coupled to the antenna and configured to filter electromagnetic signals received by the antenna to let the electromagnetic signals at the first frequency pass for processing to estimate the property.

摘要翻译： 一种用于估计由钻孔渗透的地层的性质的装置，该装置具有：构造成通过钻孔传送的载体; 设置在所述载体处并被配置为以第一频率将电磁能量传输到所述地层中的发射器; 设置在所述载体处并且被配置为由于所传输的电磁能量与所述地层相互作用而从所述地层接收电磁信号的第一天线; 以及有源滤波器，其耦合到所述天线并且被配置为对由所述天线接收的电磁信号进行滤波，以使所述第一频率处的电磁信号通过以进行处理以估计所述性质。

公开(公告)号：US20100145620A1

公开(公告)日：2010-06-10

申请号：US12328181

申请日：2008-12-04

申请人： Daniel T. Georgi ,  Carl M. Edwards ,  Sheng Fang ,  Rocco DiFoggio ,  Robert Estes

发明人： Daniel T. Georgi ,  Carl M. Edwards ,  Sheng Fang ,  Rocco DiFoggio ,  Robert Estes

IPC分类号： G01V1/40 ,  G01D18/00 ,  G01P15/00

CPC分类号： G01P15/093 ,  G01P15/18 ,  G01P21/00 ,  G01P2015/0814 ,  G01V7/00

摘要： A method to correct for a systematic error of a sensor having a plurality of accelerometers configured to measure gravitational acceleration, the method including: rotating the plurality of accelerometers about a first axis; obtaining a first set of calibration measurements from the plurality of accelerometers from the rotation about the first axis; determining a first systematic error for each accelerometer in the plurality using the first set of calibration measurements; and removing the first systematic error from sensor measurements to correct for the systematic error.

摘要翻译： 一种用于校正具有被配置为测量重力加速度的多个加速度计的传感器的系统误差的方法，所述方法包括：围绕第一轴旋转所述多个加速度计; 从围绕第一轴的旋转获得来自多个加速度计的第一组校准测量; 使用所述第一组校准测量来确定所述多个中的每个加速度计的第一系统误差; 并从传感器测量中去除第一个系统误差，以纠正系统误差。

公开(公告)号：US20090295393A1

公开(公告)日：2009-12-03

申请号：US12396977

申请日：2009-03-03

申请人： Alexandre N. Bespalov ,  Sheng Fang

发明人： Alexandre N. Bespalov ,  Sheng Fang

IPC分类号： G01V3/18

CPC分类号： G01V3/28

摘要： The present disclosure provides a method and apparatus for performing resistivity measurements of a borehole wall using a transverse octupole sensor. The sensor may be a resistivity sensor. Higher resolution is obtained with an octupole sensor than with lower-order-pole sensors. For the resistivity case, the ratio of dual-frequency measurements has reduced sensitivity to standoff.

摘要翻译： 本公开提供了一种用于使用横向八极传感器来执行井壁的电阻率测量的方法和装置。 传感器可以是电阻率传感器。 使用八极传感器获得比使用低阶极点传感器更高的分辨率。 对于电阻率情况，双频测量的比率降低了对隔离的灵敏度。

公开(公告)号：US07565246B2

公开(公告)日：2009-07-21

申请号：US11689887

申请日：2007-03-22

申请人： Sheng Fang ,  Songhua Chen

发明人： Sheng Fang ,  Songhua Chen

IPC分类号： G01V5/04

CPC分类号： G01R33/5615 ,  G01N24/081 ,  G01R33/448 ,  G01V3/32

摘要： A method for determining fluid saturation in a formation at a plurality of radial depths near a wellbore, the method including: obtaining multi-frequency nuclear magnetic resonance (NMR) response data for the formation; and processing the data to determine simultaneously the fluid saturation at each radial depth. A computer program product is provided.

摘要翻译： 一种用于确定井眼附近的多个径向深度处的地层中的流体饱和度的方法，所述方法包括：获得用于地层的多频核磁共振（NMR）响应数据; 并处理数据以同时确定每个径向深度处的流体饱和度。 提供计算机程序产品。

公开(公告)号：US20060186888A1

公开(公告)日：2006-08-24

申请号：US11398518

申请日：2006-04-05

申请人： Tsili Wang ,  Leonty Tabarovsky ,  Boris Tchakarov ,  John Signorelli ,  Sheng Fang

发明人： Tsili Wang ,  Leonty Tabarovsky ,  Boris Tchakarov ,  John Signorelli ,  Sheng Fang

IPC分类号： G01V3/18

CPC分类号： G01V3/28

摘要： A measurement-while-drilling or logging while drilling method and apparatus for determining the azimuth of providing magnetic field in a remote formation layer in the vicinity of a down hole resistivity tool. A cross-component magnetic field with substantially orthogonal transmitter and receiver coils is provided. The coil planes are either substantially orthogonal (coaxial coils) or parallel (transverse coils) with respect to, the longitudinal axis of the tool body. The coils are placed on the tool body having a external surface and a plurality of grooves are cut in the external surface of the tool body and oriented substantially horizontally with respect to the longitudinal axis of the tool body for the coils and oriented vertically with respect to the longitudinal axis of the tool body for the coaxial coils. A transverse and coaxial coil are placed in the grooves for transmission or reception of a cross-component transverse magnetic field. Ferrite materials may be inserted in the grooves in between the coil wire and the bottom of the grooves. Multiple receivers, transmitters and frequencies may be used to obtain the maximum possible signal-to-noise ratio. The in-phase or quadrature part of a magnetic field, or a combination of the two, or alternatively, the amplitude and/or phase, of the cross-component magnetic field may be measured and processed to indicate the azimuth of a remote layer boundary, provided that the layer boundary is within the depth of investigation of the tool. Measurements may also be made at continuous or multiple tool azimuths.

摘要翻译： 在钻孔方法和装置中，用于确定在井下电阻率工具附近的远程地层中提供磁场的方位的钻孔方法和装置。 提供了具有基本上正交的发射器和接收器线圈的交叉分量磁场。 线圈平面相对于工具主体的纵向轴线基本正交（同轴线圈）或平行（横向线圈）。 线圈被放置在具有外表面的工具主体上，并且在工具主体的外表面上切割出多个槽，并且相对于用于线圈的工具主体的纵向轴线基本上水平地定向并相对于 用于同轴线圈的工具主体的纵向轴线。 横向和同轴线圈放置在沟槽中，用于传输或接收横向分量横向磁场。 铁氧体材料可以插入到线圈线和槽的底部之间的凹槽中。 可以使用多个接收器，发射器和频率来获得最大可能的信噪比。 可以测量和处理磁场的同相或正交部分，或两者的组合，或备选地，横分量磁场的振幅和/或相位，以指示远程层边界的方位角 ，条件是层边界在工具的调查深度之内。 也可以在连续或多个工具方位进行测量。