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    • 51. 发明授权
    • High frequency induction log for locating formation interfaces
    • 用于定位地层界面的高频感应测井
    • US4360778A
    • 1982-11-23
    • US219414
    • 1980-12-22
    • Robert Freedman
    • Robert Freedman
    • G01V3/28
    • G01V3/28
    • A method and apparatus for logging rock formations penetrated by a borehole to determine both the resistivity and dielectric constant of the formations. The apparatus comprises an induction logging tool having at least a transmitting coil and two receiver coils and operating in the radio frequency range from 20 to 60 megahertz. The method utilizes both the in-phase and out-of-phase, with respect to the transmitter current, voltage components which are measured at each receiver. The in-phase and out-of-phase voltage components are used to compute the phase shift between the voltage signals and the relative attenuation of the voltage amplitudes between the receivers. The phase shifts and relative attenuations are relatively insensitive to the borehole (e.g., borehole radius and drilling mud resistivity) and can be used as inputs into theoretically constructed nomograms to determine both the resistivity and dielectric constant of the formation. If the invention of the drilling mud into the formation is not neglible then a tool with four spatially separated receiver coils is employed and the phase shifts and relative attenuations between the three adjacent pairs of receiver coils are computed from the in-phase and out-of-phase voltage components measured at each receiver. These data are used to determine the resistivity and dielectric constant of the invaded zone, the radius of the invaded zone, and the resistivity and dielectric constant of the non-invaded formation.
    • 一种用于记录钻孔渗透的岩层的方法和装置,以确定地层的电阻率和介电常数。 该装置包括至少具有发射线圈和两个接收器线圈并且在20至60兆赫兹的射频范围内工作的感应测井工具。 该方法相对于在每个接收器处测量的发射机电流,电压分量同时利用同相和异相。 同相和异相电压分量用于计算电压信号之间的相移和接收器之间的电压幅度的相对衰减。 相移和相对衰减对钻孔相对不敏感(例如,钻孔半径和钻井泥浆电阻率),并且可以用作理论上构造的列线图中的输入,以确定地层的电阻率和介电常数。 如果将钻井泥浆发展到地层中是不可忽略的,那么采用具有四个空间分离的接收器线圈的工具,并且从三相邻接的接收器线圈中的相位和外部计算出相邻的三个接收器线圈对之间的相移和相对衰减 在每个接收器处测量的相电压分量。 这些数据用于确定入侵区的电阻率和介电常数,入侵区的半径,以及非侵入地层的电阻率和介电常数。
    • 55. 发明申请
    • PREDICTING PROPERTIES OF LIVE OILS FROM NMR MEASUREMENTS
    • 活性油从NMR测量的预测性质
    • US20100271019A1
    • 2010-10-28
    • US12765096
    • 2010-04-22
    • VIVEK ANANDRobert Freedman
    • VIVEK ANANDRobert Freedman
    • G01V3/14
    • G01V3/32G01N24/081G01R33/305G01R33/448
    • A fluid property of live crude oil removed from an earth formation is determined using nuclear magnetic resonance (NMR) measurements. A pressure cell, located on or near the earth's surface, and in which the live crude oil is disposed, is provided. An NMR tool capable of making NMR measurements on the live crude oil is provided, as is a database linking existing NMR data and the fluid property. A mapping function is created from a combination of radial basis functions and parameters of the mapping function are derived using the database. NMR data are acquired on the live crude oil using the NMR tool, and the fluid property is estimated from the acquired NMR data using the mapping function.
    • 使用核磁共振(NMR)测量确定从地层去除的活的原油的流体性质。 提供位于地球表面上或附近的压力容器,其中设置活的原油。 提供能够对活原油进行NMR测量的NMR工具,连同现有NMR数据和流体性质的数据库也是一样。 映射函数是从径向基函数的组合创建的,映射函数的参数是使用数据库导出的。 使用NMR工具在活原油上获得NMR数据,并且使用映射函数从获取的NMR数据估计流体性质。
    • 56. 发明授权
    • High pressure/high temperature magnetic resonance tool
    • 高压/高温磁共振工具
    • US07683613B2
    • 2010-03-23
    • US11942534
    • 2007-11-19
    • Robert FreedmanKrishnamurthy GanesanDouglas W. Grant
    • Robert FreedmanKrishnamurthy GanesanDouglas W. Grant
    • G01V3/00
    • G01R33/34053G01N24/081G01R33/305G01R33/307G01R33/3806G01R33/383G01R33/60
    • The present invention pertains to an apparatus and method for conducting magnetic resonance measurements on fluids at high pressures and/or high temperatures. The apparatus can be used in conjunction with or as part of a downhole fluid sampling tool to perform NMR measurements on fluids withdrawn from petroleum reservoirs, or can also be used for laboratory measurements on live reservoir fluids. The apparatus can perform all of the measurements made by modern NMR logging tools, including multi-dimensional distribution functions of spin-spin (T2) and spin-lattice relaxation (T1) times and molecular diffusion coefficients. The spin densities of hydrogen and other NMR sensitive species can be computed from the distribution functions. The apparatus can also be used to predict the apparent conductivity of the fluids in the flowline from measurements of the quality factor (“Q”) of the NMR circuit. The apparent conductivity can be used to predict water cut or water salinity.
    • 本发明涉及用于在高压和/或高温下对流体进行磁共振测量的装置和方法。 该装置可以与井下流体采样工具结合使用或作为其一部分使用,以对从石油储存器中取出的流体进行NMR测量,或者也可用于实时储存液体的实验室测量。 该装置可以执行现代NMR测井工具进行的所有测量,包括自旋 - 自旋(T2)和自旋晶格弛豫(T1)时间的多维分布函数和分子扩散系数。 氢和其他NMR敏感物种的自旋密度可以从分布函数计算。 该装置还可以用于通过NMR电路的质量因子(“Q”)的测量来预测流线中的流体的表观电导率。 表观电导率可用于预测水分或水分盐度。