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    • 6. 发明授权
    • Downhole measurement of formation characteristics while drilling
    • 钻井时地层特征的井下测量
    • US07458257B2
    • 2008-12-02
    • US11312683
    • 2005-12-19
    • Julian J. PopReza TaherianMartin E. PoitzschJacques R. Tabanou
    • Julian J. PopReza TaherianMartin E. PoitzschJacques R. Tabanou
    • E21B47/00
    • E21B49/005E21B49/081
    • A method for determining a property of formations surrounding an earth borehole being drilled with a drill bit at the end of a drill string, using drilling fluid that flows downward through the drill string, exits through the drill bit, and returns toward the earth's surface in the annulus between the drill string and the periphery of the borehole, including the following steps: obtaining, downhole near the drill bit, a pre-bit sample of the mud in the drill string as it approaches the drill bit; obtaining, downhole near the drill bit, a post-bit sample of the mud in the annulus, entrained with drilled earth formation, after its egression from the drill bit; implementing pre-bit measurements on the pre-bit sample; implementing post-bit measurements on the post-bit sample; and determining a property of the formations from the post-bit measurements and the pre-bit measurements.
    • 一种用于确定围绕钻井的地层钻孔的性质的方法,其使用在钻柱上向下流动的钻井流体在钻柱的端部钻出,通过钻头离开,并朝向地球表面返回 钻柱和钻孔周边之间的环形空间,包括以下步骤:在钻柱附近获得钻头附近的井下钻头样品,当钻柱接近钻头时; 在钻头附近获得钻孔附近的井下钻孔后的钻头样品,在钻头从其钻出之后夹带钻井泥土; 对前置位采样执行预位测量; 对后位采样进行后位测量; 以及从后位测量和前位测量确定地层的属性。
    • 8. 发明申请
    • DOWNHOLE MEASUREMENT OF FORMATION CHARACTERISTICS WHILE DRILLING
    • 钻井时形成特征的井下测量
    • US20090049889A1
    • 2009-02-26
    • US12260225
    • 2008-10-29
    • JULIAN J. POPReza TaherianMartin E. PoitzschJacques R. Tabanou
    • JULIAN J. POPReza TaherianMartin E. PoitzschJacques R. Tabanou
    • E21B49/08
    • E21B49/005E21B49/081
    • A method for determining a property of formations surrounding an earth borehole being drilled with a drill bit at the end of a drill string, using drilling fluid that flows downward through the drill string, exits through the drill bit, and returns toward the earth's surface in the annulus between the drill string and the periphery of the borehole, including the following steps: obtaining, downhole near the drill bit, a pre-bit sample of the mud in the drill string as it approaches the drill bit; obtaining, downhole near the drill bit, a post-bit sample of the mud in the annulus, entrained with drilled earth formation, after its egression from the drill bit; implementing pre-bit measurements on the pre-bit sample; implementing post-bit measurements on the post-bit sample; and determining a property of the formations from the post-bit measurements and the pre-bit measurements.
    • 一种用于确定围绕钻井的地层钻孔的性质的方法,其使用在钻柱上向下流动的钻井流体在钻柱的端部钻出,通过钻头离开,并朝向地球表面返回 钻柱和钻孔周边之间的环形空间,包括以下步骤:在钻柱附近获得钻头附近的井下钻头样品,当钻柱接近钻头时; 在钻头附近获得钻孔附近的井下钻孔后的钻头样品,在钻头从其钻出之后夹带钻井泥土; 对前置位采样执行预位测量; 对后位采样进行后位测量; 以及从后位测量和前位测量确定地层的属性。
    • 10. 发明授权
    • Spontaneous potential measurement apparatus connected between metallic
housings of a wellbore apparatus for measuring the spontaneous
potential of an earth formation
    • 连接在用于测量地层的自发电位的井筒装置的金属壳体之间的自发电位测量装置
    • US5402069A
    • 1995-03-28
    • US80428
    • 1993-06-18
    • Jacques R. TabanouM. Reza TaherianTarek M. Habashy
    • Jacques R. TabanouM. Reza TaherianTarek M. Habashy
    • G01V3/26G01V3/18G01V3/20
    • G01V3/265
    • A spontaneous potential (SP) sub is interconnected between two metallic housings of a wellbore apparatus and is lowered into a wellbore. A spontaneous potential (SP) of an earth formation trasversed by the wellbore is measured by the SP sub, and a log is generated from the sub which is representative of the spontaneous potential of the formation, the log being substantially free of a special type of distortion which typified the prior art SP measurements taken by prior art SP measurement apparatus. The SP sub includes a measurement electrode, monitoring electrodes placed on both sides of the measurement electrode, a bucking electrode placed on both sides of the monitoring electrodes, current driving circuitry connected to the bucking electrodes, and receiving circuitry connected to the monitoring electrodes. The current driving circuitry delivers a current of sufficient magnitude to each bucking electrode such that the voltage potential between the monitoring electrodes is approximately equal to zero. The current from each bucking electrode is grounded via its own respective metallic housing and not via a surface oriented electrode. The receiving circuitry monitors the voltage between each of the monitoring electrodes and looks for a zero potential difference between the monitoring electrodes. When the receiving circuitry locates the zero potential difference at a moment in time between its monitoring electrodes, the measurement of the spontaneous potential taken by the measurement electrode at that same precise moment in time is received and recorded. A plurality of such measurements made by the measurement electrode represents a log of spontaneous potential of the earth formation traversed by the wellbore which is substantially free of the distortion which typified the prior art SP log measurements.
    • 自发电位(SP)sub在井筒装置的两个金属壳体之间互连,并被下降到井筒中。 通过SP sub测量由井筒对置的地层的自发电位(SP),并且从代表地层的自发电位的sub产生对数,对数基本上不含特殊类型 失真表示现有技术的SP测量装置所采用的现有技术SP测量。 SP sub包括测量电极,设置在测量电极两侧的监视电极,设置在监视电极两侧的降压电极,连接到降压电极的电流驱动电路和连接到监视电极的接收电路。 电流驱动电路向每个降压电极传送足够大的电流,使得监视电极之间的电压电位近似等于零。 来自每个降压电极的电流通过其各自的金属外壳而不经由表面取向的电极接地。 接收电路监视每个监测电极之间的电压,并寻找监测电极之间的零电位差。 当接收电路在其监测电极之间的时间点定位零电位差时,接收并记录测量电极在同一精确时刻所采取的自发电位的测量。 由测量电极进行的多次这样的测量表示由井筒穿过的地层的自发电位的对数,其基本上没有以现有技术的SP测量值为代表的失真。