BOREHOLE ELECTRIC FIELD SURVEY WITH IMPROVED DISCRIMINATION OF SUBSURFACE FEATURES
    33.
    发明申请
    BOREHOLE ELECTRIC FIELD SURVEY WITH IMPROVED DISCRIMINATION OF SUBSURFACE FEATURES 有权
    具有改进的表面特征分析的井眼电场勘测

    公开(公告)号:US20150061684A1

    公开(公告)日:2015-03-05

    申请号:US14013681

    申请日:2013-08-29

    CPC classification number: E21B49/00 G01V3/20 G01V3/24

    Abstract: Errors produced in a borehole to surface electromagnetic (BSEM) survey by near surface electrical anomalies on the estimates of formation properties are reduced. The effects of variations in subsurface electrical resistivity near the surface are separated from electrical resistivity changes at locations in the formations of interest far from the measurement region. A survey system includes one or more electrodes to inject electrical current at formation depth within a borehole, one or more counter electrodes which collect such current on the surface of the earth, and one or more electrodes to inject current on the surface. A transmitter is selectively connectable to different sets of the electrodes to cause a current to flow between the selected electrode sets. The resultant fields from the current flow are sensed and processed. The effects of near surface anomalies are detectable in the data and removable from the survey data of interest regarding the formations. The survey data more accurately indicates formation features or properties of interest.

    Abstract translation: 通过近地面电气异常对钻孔产生的表面电磁(BSEM)测量的误差对地层性质的估计有所减少。 在表面附近的地下电阻率变化的影响与远离测量区域的感兴趣地层中的位置处的电阻率变化分离。 测量系统包括一个或多个用于在钻孔内的地层深度注入电流的电极,在地球表面上收集这种电流的一个或多个对置电极以及用于在表面上注入电流的一个或多个电极。 发射器可选择性地连接到不同组的电极,以使电流在所选择的电极组之间流动。 来自当前流程的结果字段被感测和处理。 近地表异常的影响在数据中可以检测到,并且可以从关于地层的感兴趣的调查数据中移除。 调查数据更准确地表示感兴趣的形成特征或性质。

    INDUCED POLARIZATION MAPPING WITH BOREHOLE TO SURFACE ELECTROMAGNETIC TRANSMITTER DATA
    34.
    发明申请
    INDUCED POLARIZATION MAPPING WITH BOREHOLE TO SURFACE ELECTROMAGNETIC TRANSMITTER DATA 有权
    带孔面的电磁偏转映射到表面电磁发射器数据

    公开(公告)号:US20140203811A1

    公开(公告)日:2014-07-24

    申请号:US14221950

    申请日:2014-03-21

    CPC classification number: G01V3/20 E21B47/122 G01V3/26 G01V3/28 G01V3/30 G01V3/38

    Abstract: An electromagnetic energy transmitter is provided for induced polarization mapping with a borehole to surface electromagnetic (BSEM) transmitter. The transmitter is lowered into a well borehole to a desired location in a well borehole to emit electromagnetic energy. An array of receivers spaced over an area of the earth surface senses the induced polarization response to the emitted electromagnetic energy in areas of interest for mapping. Maps are formed of the induced polarization responses sensed by the array of receivers.

    Abstract translation: 提供电磁能量发射器用于用井眼对表面电磁(BSEM)发射器进行感应极化映射。 将发射器下降到井眼中,到井眼中的期望位置以发射电磁能。 在地球表面的一个区域上间隔开的接收器阵列可以感测感兴趣的区域中对所发射的电磁能的诱发极化响应。 地图由接收器阵列感测的感应极化响应形成。

    INDUCED POLARIZATION LOGGING WITH BOREHOLE TO SURFACE ELECTROMAGNETIC TRANSMITTER
    35.
    发明申请
    INDUCED POLARIZATION LOGGING WITH BOREHOLE TO SURFACE ELECTROMAGNETIC TRANSMITTER 有权
    用表面电磁发射器进行诱导极化测井

    公开(公告)号:US20140203810A1

    公开(公告)日:2014-07-24

    申请号:US14221854

    申请日:2014-03-21

    CPC classification number: G01V3/20 E21B47/122 G01V3/26 G01V3/28 G01V3/30 G01V3/38

    Abstract: An electromagnetic energy transmitter is provided for induced polarization logging with a borehole to surface electromagnetic (BSEM) transmitter. The transmitter is lowered into a well borehole to a desired location in a well borehole to emit electromagnetic energy for the surveys. The transmitter affords more accurate measurements of its position in the well borehole. The transmitter also senses pressure and temperature conditions at its borehole location to provide indications of detected potential problems in the well from the survey or other sources, and to reduce risks and enhance safety and quality of the operations.

    Abstract translation: 提供电磁能量发射器用于具有钻孔到表面电磁(BSEM)发射器的感应极化测井。 将发射器下沉到井眼中到井眼中的期望位置以发射用于勘测的电磁能。 变送器可以更准确地测量其在井眼中的位置。 变送器还可以感测其钻孔位置处的压力和温度条件,以提供勘测或其他来源的井中发现的潜在问题的指示,并降低风险并提高操作的安全性和质量。

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