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1.发明授权
公开(公告)号：US6047595A
公开(公告)日：2000-04-11
申请号：US989307
申请日：1997-12-12
IPC分类号： E21B49/00
CPC分类号： E21B49/00
摘要： There is provided a method of accurately estimating the permeability of sedimentary rock formations from well logging data. The method involves a short relaxation time strategy with the identification of the key k-Lambda parameter S/V.sub.p, which is the surface-to-pore ratio. The inverse of T.sub.2 is related to this ratio by the surface relaxivity, .rho.2. The k-Lambda estimator is given by: ##EQU1## where: .DELTA.V.sub.1 represents the volume elements of the T.sub.2 distribution and the sum over i=1 to n represents some set of early to later volume elements; and V.sub.p is the total pore volume.
摘要翻译： 提供了一种从测井资料中准确估计沉积岩层渗透率的方法。 该方法涉及短的弛豫时间策略，其中识别作为表面与孔隙比的关键k-λ参数S / Vp。 T2的倒数与表面弛豫rho 2的这个比值有关。k-Lambda估计器由下式给出：其中：DELTA V1表示T2分布的体积元素，i = 1到n之间的和代表一些集合 早期到后期的体积元素; Vp是总孔体积。
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2.发明授权Nuclear magnetic resonance pulse sequences for determining bound fluid volume 失效用于确定结合流体体积的核磁共振脉冲序列
公开(公告)号：US5389877A
公开(公告)日：1995-02-14
申请号：US800339
申请日：1991-11-27
CPC分类号： G01N24/081 , G01V3/32
摘要： An NMR pulse sequence for use in a borehole logging tool includes a series of CPMG pulses according to:T.sub.r -90.degree..sub..+-.x -(t.sub.cp -180.degree..sub.y -t.sub.cp -echo.sub.j)where j is the index of CPMG echoes gathered, T.sub.r is wait time, t.sub.cp is the Carr-Purcell spacing. This pulse sequence is used to determine Bound Fluid Volume (BFV) which is subtracted from total porosity to yield Unbound Fluid Volume (UFV) of a formation surrounding the borehole. Measuring the BVF, the amount of rapidly relaxing fluid (less than 50 ms), is more efficient than measuring UFV (up to 2 secs), and is insensitive to motion of the logging tool.
摘要翻译： 用于钻孔测井工具的NMR脉冲序列包括一系列CPMG脉冲，它们根据：Tr-90°+/- x-（tcp-180°y-tcp-echoj），其中j是收集的CPMG回波的指数， Tr是等待时间，tcp是Carr-Purcell间隔。 该脉冲序列用于确定从总孔隙度中减去的结合流体体积（BFV），以产生围绕钻孔的地层的未结合流体体积（UFV）。 测量BVF，快速松弛液体的量（小于50 ms）比测量UFV（最多2秒）更有效，并且对测井工具的运动不敏感。
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公开(公告)号：US06570381B1
公开(公告)日：2003-05-27
申请号：US09276049
申请日：1999-03-25
IPC分类号： G01V300
CPC分类号： G01V3/32 , G01N24/081
摘要： The present invention relates generally to a nuclear magnetic resonance apparatus and method for substantially eliminating the effects of phase coherent acoustic ringing in borehole logging. A series of cycles of measurement pulse sequences are applied to the formation surrounding the borehole. Each pulse sequence includes an RF excitation pulse and several RF refocusing pulses. Spin echoes are received that contain spurious ringing signals from the excitation and refocusing pulses. Spin echo signals from corresponding spin echoes of each cycle are combined and substantially cancel the spurious ringing from the excitation and refocusing pulses of the pulse sequences.
摘要翻译： 本发明一般涉及一种用于基本消除井眼测井中的相位相干声环的影响的核磁共振装置和方法。 将测量脉冲序列的一系列循环应用于围绕钻孔的地层。 每个脉冲序列包括一个RF激励脉冲和几个RF重聚焦脉冲。 接收到包含来自激发和重聚焦脉冲的杂散振铃信号的自旋回波。 来自每个周期的相应自旋回波的旋转回波信号被组合，并且基本上抵消来自脉冲序列的激发和重聚焦脉冲的杂散振铃。
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公开(公告)号：US20090091320A1
公开(公告)日：2009-04-09
申请号：US12020788
申请日：2008-01-28
申请人： Charles Flaum , Robert L. Kleinberg , Christian Straley , Robert Badry , Austin Boyd , Olivier Faivre , Shawn Taylor , Anthony R.H. Goodwin
发明人： Charles Flaum , Robert L. Kleinberg , Christian Straley , Robert Badry , Austin Boyd , Olivier Faivre , Shawn Taylor , Anthony R.H. Goodwin
IPC分类号： G01V3/32
CPC分类号： G01V3/32
摘要： Methods and apparatus for the characterization of formation fluids are disclosed. A downhole tool disposed in a borehole penetrating a subterranean formation obtains a NMR measurement, effects a change in a characteristic of the formation fluid, and obtains another NMR measurement subsequent to the change. Alternatively, the downhole tool effects a radial gradient of a characteristic of the formation and obtains NMR measurements at two or more selected radial distances from the wellbore wall. A parameter representative of the subterranean formation or the formation fluid is further determined from the NMR measurements.
摘要翻译： 公开了表征地层流体的方法和装置。 设置在贯穿地层的钻孔中的井下工具获得NMR测量，影响地层流体的特性的变化，并且在改变之后获得另一NMR测量。 或者，井下工具实现地层特征的径向梯度，并从井筒壁的两个或更多个选定的径向距离获得核磁共振测量。 从NMR测量进一步确定代表地层或地层流体的参数。
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公开(公告)号：US07804296B2
公开(公告)日：2010-09-28
申请号：US12020788
申请日：2008-01-28
申请人： Charles Flaum , Robert L. Kleinberg , Christian Straley , Robert Badry , Austin Boyd , Olivier Faivre , Shawn Taylor , Anthony R. H. Goodwin
发明人： Charles Flaum , Robert L. Kleinberg , Christian Straley , Robert Badry , Austin Boyd , Olivier Faivre , Shawn Taylor , Anthony R. H. Goodwin
IPC分类号： G01V3/00
CPC分类号： G01V3/32
摘要： Methods and apparatus for the characterization of formation fluids are disclosed. A downhole tool disposed in a borehole penetrating a subterranean formation obtains a NMR measurement, effects a change in a characteristic of the formation fluid, and obtains another NMR measurement subsequent to the change. Alternatively, the downhole tool effects a radial gradient of a characteristic of the formation and obtains NMR measurements at two or more selected radial distances from the wellbore wall. A parameter representative of the subterranean formation or the formation fluid is further determined from the NMR measurements.
摘要翻译： 公开了表征地层流体的方法和装置。 设置在贯穿地层的钻孔中的井下工具获得NMR测量，影响地层流体的特性的变化，并且在改变之后获得另一NMR测量。 或者，井下工具实现地层特征的径向梯度，并从井筒壁的两个或更多个选定的径向距离获得核磁共振测量。 从NMR测量进一步确定代表地层或地层流体的参数。
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公开(公告)号：US06883702B2
公开(公告)日：2005-04-26
申请号：US10384265
申请日：2003-03-07
CPC分类号： G01V3/32
摘要： The present invention relates to a method and apparatus for determining the wettability of a porous media, such as bone, plant, food, wood or molecular sieves, etc., having two or more fluids. The method of the present invention correlates a diffusion-relaxation calibration function representative of at least one fluid in the porous media with a 2-D function developed using diffusion-editing to determine wettability of the porous media.
摘要翻译： 本发明涉及一种用于测定具有两种或多种流体的多孔介质如骨，植物，食品，木材或分子筛等的润湿性的方法和设备。 本发明的方法将代表多孔介质中的至少一种流体的扩散弛豫校准函数与使用扩散编辑开发的2-D函数相关联，以确定多孔介质的润湿性。
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