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    • 4. 发明申请
    • FLUID FLOW PROPERTIES FROM ACOUSTICALLY STIMULATED NMR
    • 流体流动特征从声刺激NMR
    • WO2005008187A3
    • 2005-06-02
    • PCT/US2004021351
    • 2004-07-02
    • EXXONMOBIL RES & ENG COTHOMANN HANSZHOU MINYAO
    • THOMANN HANSZHOU MINYAO
    • G01R33/44G01V3/32G01V3/00
    • G01N24/081G01V3/32
    • This invention is a method to measure fluid flow properties of a porous medium, including, but not limited to, the fluid flow permeability. In a preferred embodiment, the measurements are made down hole in drill wells exploring for hydrocarbons or acquifers. The measurement involves two types of instruments. One instrument creates a pressure wave (P) in the porous medium, which generates motion of the fluid in the pore space. The second instrument measures the fluid in the pore space using Nuclear Magnetic Resonance (NMR) methods. Any type of instrument that can generate a pressure gradient is suitable, including instruments that are remote from the NMR instrument. Magnetic field gradients (B) can be used to localize the NMR signal to a specific region within the porous medium. The magnetic field gradient (B) also provides the method by which the fluid motion is encoded on to the NMR signal. The permeability is calculated form the known pressure gradient (P) present in the porous medium by virtue of the applied pressure gradient or pressure wave and the velocity of the fluid in the rock pore space measured by NMR.
    • 本发明是一种测量多孔介质的流体流动特性的方法,包括但不限于流体流动渗透性。 在一个优选实施例中,在钻探井中测量碳氢化合物或接收者的钻孔。 测量涉及两种仪器。 一种仪器在多孔介质中产生压力波(P),其在孔隙空间中产生流体的运动。 第二种仪器使用核磁共振(NMR)方法测量孔隙空间中的流体。 可以产生压力梯度的任何类型的仪器是合适的,包括远离NMR仪器的仪器。 磁场梯度(B)可用于将NMR信号定位到多孔介质中的特定区域。 磁场梯度(B)还提供了流体运动被编码到NMR信号上的方法。 通过施加的压力梯度或压力波和通过NMR测量的岩石孔隙空间中的流体速度,从多孔介质中存在的已知压力梯度(P)计算渗透率。