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1.发明授权Dielectric well logging system with at least three transmitter coils and at least two receiver coils for determining resistivity and dielectric constant of a subsurface formation adjacent a fluid invaded zone of the formation 失效具有至少三个发射器线圈和至少两个接收器线圈的介电测井系统，用于确定邻近地层的流体侵入区域的地下地层的电阻率和介电常数
公开(公告)号：US4609873A
公开(公告)日：1986-09-02
申请号：US109691
申请日：1980-01-04
CPC分类号： G01V3/28
摘要： A dielectric well logging system is provided to determine dielectric constant and resistivity in formations invaded by water to determine oil and water saturations of the formations. Plural transmitters are activated in a time division multiplex manner and sensed by receiver coils. The amplitude ratio and phase difference between the signals sensed by the receiver coils are then used to determine dielectric constant and resistivity which may then be used to determine invasion characteristics.
摘要翻译： 提供电介质测井系统以确定由水侵入的地层中的介电常数和电阻率，以确定地层的油和水饱和度。 多个发射机以时分多路复用方式激活，并由接收机线圈感测。 接收器线圈感测到的信号之间的振幅比和相位差然后用于确定介电常数和电阻率，然后可以用它来确定入侵特性。
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2.发明授权
公开(公告)号：US4012689A
公开(公告)日：1977-03-15
申请号：US517704
申请日：1974-10-24
CPC分类号： G01V3/28
摘要： The invention disclosed herein includes methods and apparatus for determining the resistivity and dielectric constant of earth materials in the vicinity of a well borehole. A radio frequency electromagnetic field in the frequency range from 20 to 40 megahertz is generated in a borehole and the total electromagnetic field at two longitudinally spaced locations is detected. Measurements of the relative phase shift in the field between the detector locations and the amplitude of the field at least at one of the detector locations may then be interpreted according to predetermined relationships in terms of the earth formation resistivity and dielectric constant.
摘要翻译： 本文公开的本发明包括用于确定井眼附近的土壤材料的电阻率和介电常数的方法和装置。 在井眼中产生频率范围为20至40兆赫兹的射频电磁场，并且检测两个纵向间隔位置处的总电磁场。 可以根据地球电阻率和介电常数的预定关系来解释至少在检测器位置之一处的检测器位置与场的振幅之间的场中相对相移的测量。
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3.发明授权
公开(公告)号：US4107598A
公开(公告)日：1978-08-15
申请号：US800500
申请日：1977-05-25
摘要： A system operating at radio frequencies in the range of 10 MHZ to 60 MHZ is provided for simultaneously determining the resistivity and dielectric constant of earth formations in the vicinity of a well bore. A transmitter coil and two longitudinally spaced receiver coils are provided in the system. Circuit means for measuring the unnormalized amplitude ratio and the relative phase shift of electromagnetic waves at the spaced receiver coils are provided. A relationship is given whereby the formation dielectric constant and resistivity may be obtained from the amplitude ratio and relative phase shift measurements.
摘要翻译： 提供了在10MHz至60MHz范围内的射频操作的系统，用于同时确定井眼附近地层的电阻率和介电常数。 发射机线圈和两个纵向间隔的接收器线圈设置在系统中。 提供用于测量非标准化幅度比和在隔开的接收器线圈处的电磁波的相对相移的电路装置。 给出一种关系，由此可以从振幅比和相对相移测量中获得形成介电常数和电阻率。
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4.发明授权
公开(公告)号：US4107597A
公开(公告)日：1978-08-15
申请号：US749845
申请日：1976-12-13
CPC分类号： G01V3/30
摘要： The invention disclosed herein includes methods and apparatus for determining true formation resistivity, flushed zone resistivity and invasion diameter of the earth formation in the vicinity of a well borehole. A radio frequency electromagnetic field in the frequency range from 800 kilohertz to 4 megahertz is generated in a borehole and the electromagnetic field is detected at a plurality of longitudinally spaced locations. Measurements of the attenuation and propagation velocity of the electromagnetic wave at the longitudinally spaced receivers may then be interpreted according to predetermined relationships in terms of the formation resistivity, flushed zone resistivity and invasion diameter surrounding the borehole.
摘要翻译： 本文公开的发明包括用于确定井眼附近的地层的真实地层电阻率，冲刷区电阻率和侵入直径的方法和装置。 在钻孔中产生频率范围从800千赫兹到4兆赫兹的射频电磁场，并且在多个纵向间隔位置检测电磁场。 然后可以根据围绕钻孔的地层电阻率，冲刷区电阻率和入侵直径根据预定的关系来解释在纵向间隔的接收器处的电磁波的衰减和传播速度的测量。
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5.发明授权
公开(公告)号：US3993944A
公开(公告)日：1976-11-23
申请号：US643421
申请日：1975-12-22
CPC分类号： G01V3/28
摘要： An exemplary embodiment of the invention includes method for measuring the dielectric constant and resistivity of the invaded zone and the virgin formation in a fluid filled well bore hole. Dual induction laterolog measurements are employed to determined R.sub.t and R.sub.xo. Dual spaced radio frequency dielectric induction log measurements are employed to determine .epsilon..sub.t and .epsilon..sub.xo. By combining these measurements, a movable oil plot may be obtained in highly resistive formations.
摘要翻译： 本发明的示例性实施例包括用于测量流体填充的井眼孔中的入侵区域和原始地层的介电常数和电阻率的方法。 采用双重感应测量来确定Rt和Rxo。 采用双重间隔的射频介电感应对数测量来确定ε和εx。 通过组合这些测量，可以在高电阻地层中获得可移动的油图。
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公开(公告)号：US06483310B1
公开(公告)日：2002-11-19
申请号：US09690133
申请日：2000-10-17
申请人： Richard A. Meador
发明人： Richard A. Meador
IPC分类号： G01V330
摘要： A sonde is movable lengthwise in and relative to tubular structure such as a drill collar; slits extend through the tubular structure; and antennae coils on the sonde come into registration with the slits, for transmitting electromagnetic energy into the underground formation via certain slits, and for receiving such transmitted energy back through other of the slits, for processing.
摘要翻译： 探测器可以纵向移动并相对于诸如钻铤的管状结构移动; 狭缝延伸穿过管状结构; 并且探头上的天线线圈与狭缝对准，用于通过某些狭缝将电磁能传递到地下地层中，并将这种传输的能量通过其他狭缝接收，以进行处理。
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7.发明授权Electrical resistivity measurement of a flowing drilling fluid using eddy currents generated therein 失效使用其中产生的涡流的流动钻井液的电阻率测量
公开(公告)号：US4536713A
公开(公告)日：1985-08-20
申请号：US471879
申请日：1983-03-03
CPC分类号： E21B49/005 , G01N27/023 , G01N27/74 , G01V3/102
摘要： A high permeability ferrite core, which includes a gap between adjacent ends thereof, is combined with a magnetic coil encircling the core, and is located in a sub positioned in the drill string just above the drill bit of a borehole drilling rig. The core is positioned so that the gap thereof lies across a recess region formed in the outer wall of the sub. Drilling fluids flow along the outer surface of the sub on the return path from the drill bit to the mud pits located at the surface of the borehole. A constant current, or voltage, at a frequency within the range of 20 KHz-20 MHz is applied to the terminals of the coil encircling the core and the eddy currents developed in the gap region produce a measurable back emf at the coil terminals. The current produced by this emf voltage is indicative of the resistivity of the drilling fluid within the recess region in the wall of the sub and the fluctuations of the voltage accurately follow the variations in drilling fluid resistivity.
摘要翻译： 包括其相邻端之间的间隙的高磁导率铁氧体磁芯与环绕磁芯的磁性线圈组合，并且位于位于钻孔钻柱的位于钻孔钻机的钻头上方的钻柱中的子系统中。 芯部定位成使得其间隙跨越形成在子的外壁中的凹部区域。 钻井液体沿着从钻头返回路径的子表面流到位于钻孔表面的泥浆坑。 在20KHz-20MHz的频率范围内的恒定电流或电压被施加到环绕磁芯的线圈的端子上，并且在间隙区域中产生的涡流在线圈端子处产生可测量的反电动势。 由该电动势电压产生的电流表示在子壁的凹陷区域内的钻井流体的电阻率，并且电压的波动准确地跟随钻井液电阻率的变化。
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8.发明授权Combination radio frequency dielectric and conventional induction logging system 失效组合射频电介质和常规感应测井系统
公开(公告)号：US3982176A
公开(公告)日：1976-09-21
申请号：US531562
申请日：1974-12-11
申请人： Richard A. Meador
发明人： Richard A. Meador
CPC分类号： G01V3/30
摘要： A well logging system is provided which simultaneously employs a conventional deep induction log and a radio frequency dielectric log to differentiate similar high resistivity fresh water and oil prospective zones. A 16 megahertz radio frequency dielectric induction logging system which is responsive to both conductivity and permittivity of the earth derives a signal primarily related to both of these properties. A conventional 20 kilohertz deep induction system is used to derive a signal which is primarily a function of conductivity alone. When combined in accordance with predetermined relationships according to the invention the two measurements can be used to find oil prospective zones.
摘要翻译： 提供测井系统，其同时采用传统的深感应测井和射频电介质测井，以区分类似的高电阻率的淡水和油前景区。 对地球的电导率和介电常数都有响应的16兆赫兹射频介电感应测井系统产生了与这两个特性相关的信号。 常规的20千赫深感应系统用于导出主要仅仅是导电性的函数的信号。 当根据本发明的预定关系组合时，可以使用两个测量来查找油前景区域。
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9.发明授权High sensitivity well logging system having dual transmitter antennas and intermediate series resonant 失效具有双发射天线和中间串联谐振的高灵敏度测井系统
公开(公告)号：US5081419A
公开(公告)日：1992-01-14
申请号：US697524
申请日：1991-04-29
摘要： A well logging apparatus and method for measuring the resistivity of the formation surrounding a borehole is disclosed. The invention provides two transmitting antennas arranged around a housing means or drill collar in spaced relation from one another. A transmitting circuit alternately supplies an oscillating drive signal to each transmitting antenna with a sufficiently high frequency such that one and then the other of the transmitting antennas radiates an electromagnetic wave signal which propagates through the formation. Two receiving antennas are located equally spaced between the transmitting antennas to produce pick-up signals from the electromagnetic wave propagating through the formation. Each receiving antenna includes a single turn coil connected in series with a capacitor to provide a reduced impedance circuit to resonate in the frequency region embracing the oscillating drive signal. Receive antenna circuitry responsive to induced alternating current in the coil produces a signal indicative of the formation parameter under study. The method of positioning two series resonant single turn receiving antennas tuned to the oscillating drive frequency and alternately coupling an electrical drive signal to a pair of transmitters spaced equally on each side of the receiving antennas allows receiving signals which are self-cancelling for system induced effects.
摘要翻译： 公开了用于测量围绕钻孔的地层的电阻率的测井装置和方法。 本发明提供了两个彼此间隔开的布置在壳体装置或钻铤周围的发射天线。 发射电路以足够高的频率向每个发射天线交替地提供振荡驱动信号，使得发射天线中的一个发射天线和另一个发射天线辐射通过地层传播的电磁波信号。 两个接收天线位于发射天线之间的距离相等的距离处，以产生从电磁波传播通过地层的拾取信号。 每个接收天线包括与电容器串联连接的单匝线圈，以提供减小的阻抗电路以在包含振荡驱动信号的频率区域中谐振。 响应于线圈中的感应交流电的接收天线电路产生指示正在研究的地层参数的信号。 将调谐到振荡驱动频率的两个串联谐振单匝接收天线定位并将电驱动信号交替地耦合到在接收天线的每一侧上均匀隔开的一对发射机的方法允许接收对于系统感应效应而自消除的信号 。
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10.发明授权Logging tool and method for measuring resistivity of different radial zones at a common depth of measurement 失效测量工具和测量方法，用于测量不同径向区域的电阻率
公开(公告)号：US4451789A
公开(公告)日：1984-05-29
申请号：US306209
申请日：1981-09-28
申请人： Richard A. Meador
发明人： Richard A. Meador
IPC分类号： G01V3/30
CPC分类号： G01V3/30
摘要： A wireline logging system for measuring formation resistivity includes a longitudinal housing having three transmitters and three receivers arranged at measured distances on the housing, with about four feet between the outermost ends of the array. The transmitters are operated at three different frequencies, with each receiver receiving all three frequencies. The output of each receiver is the three received frequencies, which is amplified and fed to a mixer. A local oscillator frequency is also fed to each mixer. The output from each mixer of the three received frequencies mixed with a local frequency is passed through a filter to output one of the three received signals at a lower frequency. The frequency mix is arranged so that the output of each of the filters is at a common frequency. The filtered outputs from pairs of the filters are then passed to phase comparators and/or amplitude ratio determining devices to provide signals indicative of formation resistivity which are then passed to the surface on the wireline.
摘要翻译： 用于测量地层电阻率的电缆测井系统包括具有三个发射器和三个接收器的纵向壳体，三个发射器和三个接收器布置在壳体上的测量距离处，在阵列的最外端之间约四英尺。 发射机以三种不同的频率工作，每个接收机接收三个频率。 每个接收机的输出是三个接收的频率，其被放大并馈送到混频器。 本地振荡器频率也被馈送到每个混频器。 来自与本地频率混合的三个接收频率的每个混频器的输出通过滤波器以较低频率输出三个接收信号中的一个。 频率混合被布置成使得每个滤波器的输出处于共同的频率。 然后将滤波器对的滤波后的输出传递给相位比较器和/或幅度比确定装置，以提供指示地层电阻率的信号，然后将其传递到有线线路上的表面。
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