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    • 3. 发明公开
    • MULTI-ARRAY LATEROLOG TOOLS AND METHODS WITH DIFFERENTIAL VOLTAGE MEASUREMENTS
    • 多维多伦多维多利亚州MERTIRENI LATEROLOG-WERKZEUGE VERFAHREN MIT VERSCHIEDENEN SPANNUNGSMESSUNGEN
    • EP2622380A1
    • 2013-08-07
    • EP11841823.5
    • 2011-11-02
    • Halliburton Energy Services, Inc.Li, ShanjunSan Martin, Luis E.Bittar, Nichael S.Li, Jing
    • LI, ShanjunSAN MARTIN, Luis, E.BITTAR, Nichael, S.LI, Jing
    • G01V3/00
    • G01V3/20G01V3/24
    • Multi-array laterolog tool systems and methods acquire a set of array measurements sufficient to provide laterolog tool measurements of differing array sizes. Such systems and method offer multiple depths of investigation while offering greater measurement stability in borehole environments having high resistivity contrasts. In at least some system embodiments, a wireline or LWD tool body has a center electrode positioned between multiple pairs of guard electrodes and a pair of return electrodes. The tool's electronics provide a current from the center electrode to the pair of return electrodes and currents from each pair of guard electrodes to the pair of return electrodes. Each of the currents may be distinguishable by frequency or distinguishable by some other means. This novel arrangement of currents provides a complete set of measurements that enables one tool to simultaneously emulate a whole range of laterolog tools.
    • 多阵列后置工具系统和方法获取足够的阵列测量数组,以提供不同阵列大小的远程工具测量。 这种系统和方法提供了多个调查深度,同时在具有高电阻率对比度的钻孔环境中提供更大的测量稳定性。 在至少一些系统实施例中,有线或LWD工具主体具有位于多对保护电极和一对返回电极之间的中心电极。 工具的电子器件提供从中心电极到一对返回电极的电流以及从每对保护电极到一对返回电极的电流。 每个电流可以通过频率来区分或通过某种其他方式可区分。 这种新颖的电流布置提供了一整套测量,使一个工具能够同时模拟一整套后期工具。