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    • 25. 发明申请
    • METHOD FOR EVALUATION OF THE GROUND REINFORCEMENT EFFECT USING 4-D ELECTRICAL RESISTIVITY MONITORING
    • 使用四维电阻监测来评估地面增强效应的方法
    • WO2009120035A3
    • 2009-11-19
    • PCT/KR2009001570
    • 2009-03-27
    • KOREA INST OF GEOSCIENCE & MINPARK SAM-GYUKIM JUNG-HOYI MYUNG-JONGCHO SEONG-JUN
    • PARK SAM-GYUKIM JUNG-HOYI MYUNG-JONGCHO SEONG-JUN
    • G01R27/20E02D3/12G01V3/20
    • E02D1/08E02D1/02E02D33/00
    • Disclosed is a method of evaluating a ground reinforcement effect using 4-D electrical resistivity monitoring, wherein the ground reinforcement is made up on an underground cavity through cement mortar grouting, the method including: (a) installing a survey line (510) for measuring electrical resistivity in a ground reinforcement zone; (b) measuring the electrical resistivity of the ground reinforcement zone through the survey line before grouting mortar (520), and imaging three-dimensional electrical resistivity distribution in the ground reinforcement zone by applying a three-dimensional electrical resistivity inversion to the measured results; (c) measuring the electrical resistivity of the ground reinforcement zone through the survey line while or after grouting the mortar (530), and imaging the three-dimensional electrical resistivity distribution in the ground reinforcement zone by applying the three-dimensional electrical resistivity inversion to the measured results; and (d) calculating a change ratio of the electrical resistivity (540) measured while or after the grouting in (c) to the electrical resistivity measured before the grouting in (b), and evaluating the ground reinforcement effect by imaging the three-dimensional electrical resistivity distribution in the ground reinforcement zone on the basis of the change ratio (550).
    • 本发明公开了一种使用4-D电阻率监测来评估地面加固效果的方法,其中地面加强件通过水泥砂浆灌浆在地下空腔上构成,该方法包括:(a)安装测量线(510) 地面加固区的电阻率; (b)在灌浆砂浆(520)之前通过测量线测量地面加固区域的电阻率,并通过对测量结果应用三维电阻率反演来对地面加固区域中的三维电阻率分布进行成像; (c)在灌浆砂浆之前或之后测量地面加固区域的电阻率(530),并通过将三维电阻率反演应用于地面加固区域中的三维电阻率分布进行成像 测量结果; 和(d)计算在(c)中的灌浆期间或之后测量的电阻率(540)与在(b)中的灌浆之前测量的电阻率的变化率,并且通过将三维 基于变压比的地面加固区电阻率分布(550)。
    • 30. 发明申请
    • SYSTEM AND METHOD FOR MEASURING RESISTIVITY THROUGH CASING
    • 用于测量电阻率的系统和方法
    • WO2003054585A1
    • 2003-07-03
    • PCT/US2002/040911
    • 2002-12-20
    • HALLIBURTON ENERGY SERVICES, INC.
    • PRAMMER, Manfred, G.
    • G01V3/20
    • G01V3/24
    • The present invention is a system and method capable of providing continuous measurements of resistivity-through-casing "RTC" of a geological formation traversed by a borehole by eliminating measurement of the casing resistance. To this end, a real-time feedback control substantially eliminates current flow along the casing in the vicinity of an injection point for injecting a measuring current into the formation. This allows direct estimation of the measuring current injected into the formation along with the casing voltage used to drive the current into the formation. As a result, there is no need for "nulling" or calibration cycle that requires two step measurements with the RTC tool held stationary. The preferred feedback is by the proportional integral derivative procedure "PID" with a digital signal processor (125) that controls bi-directional steerable current sources (135, 140, 145) supplying one or more currents to the casing at various points.
    • 本发明是能够通过消除套管电阻的测量来提供由钻孔穿过的地质地层的电阻率“RTC”的连续测量的系统和方法。 为此,实时反馈控制基本上消除了在用于将测量电流注入到地层中的注入点附近沿壳体的电流。 这允许直接估计注入到地层中的测量电流以及用于驱动电流进入地层的套管电压。 因此,不需要使用RTC工具固定的两个步进测量的“归零”或校准周期。 优选的反馈是通过比例积分微分程序“PID”与数字信号处理器(125),数字信号处理器(125)控制在各个点向壳体提供一个或多个电流的双向可控电流源(135,140,​​145)。