Nuclear magnetic resonance borehole logging apparatus and method for
ascertaining a volume of hydrocarbons independent of a diffusion
coefficient
    1.
    发明授权
    Nuclear magnetic resonance borehole logging apparatus and method for ascertaining a volume of hydrocarbons independent of a diffusion coefficient 失效
    用于确定独立于扩散系数的烃体积的核磁共振钻孔测井装置和方法

    公开(公告)号:US5796252A

    公开(公告)日:1998-08-18

    申请号:US783778

    申请日:1997-01-15

    IPC分类号: G01V3/32

    CPC分类号: G01V3/32

    摘要: A nuclear magnetic resonance (NMR) logging technique reveals the volume of hydrocarbons in an earth formation. The differences in viscosity among gas, oil and water are used to distinguish among these three fluids. During NMR logging, a parameter of a sequence of magnetic field pulses is altered, causing echo signal strengths to vary due to the diffusion of the fluids in the formation. The volume of hydrocarbons in the formation is determined from detected spin echo strengths. The invention applies to wireline NMR logging and NMR logging-while-drilling techniques.

    摘要翻译: 核磁共振(NMR)测井技术揭示了地层中碳氢化合物的体积。 气体,油和水之间的粘度差异用于区分这三种流体。 在NMR记录期间,改变了磁场脉冲序列的参数,导致回波信号强度由于流体在地层中的扩散而变化。 从检测到的自旋回波强度确定地层中烃的体积。 本发明适用于电缆NMR测井和核磁共振测井同时钻井技术。