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11.发明申请公开(公告)号：US20160169820A1
公开(公告)日：2016-06-16
申请号：US14567364
申请日：2014-12-11
CPC分类号： G01N24/081 , G01N33/241 , G01R33/445 , G01R33/448 , G01V3/32
摘要： A method for determining the concentration of asphaltenes in a solution is described. A model is first established for estimating the concentration of asphaltenes in a solution based on multiple samples of solutions of asphaltenes in the solvent in which the concentrations are known. The multiple samples have varying concentrations of asphaltenes. The diffusivity and relaxation time are measured for each sample using two-dimensional NMR. The ratio of diffusivity to relaxation time for each sample is then calculated. A linear equation is determined to fit the relationship between the ratio of diffusivity to relaxation time and the asphaltene concentration by weight for the multiple samples, thus creating the model. For a given solution sample for which the concentration of asphaltenes is desired to be determined, diffusivity and relaxation time are determined using two-dimensional NMR, and the ratio of diffusivity to relaxation time is calculated. This ratio is then used with the model, so that the linear equation can be solved for the asphaltene concentration in the given solution sample.
摘要翻译： 描述了确定溶液中沥青质浓度的方法。 首先建立一种模型，用于根据浓度已知的溶剂中沥青质溶液的多个样品估算溶液中沥青质的浓度。 多个样品具有不同浓度的沥青质。 使用二维NMR测量每个样品的扩散率和弛豫时间。 然后计算每个样品的扩散率与弛豫时间的比率。 确定线性方程式，以适应多个样品的扩散系数与松弛时间的比值以及重量的沥青质浓度之间的关系，从而形成模型。 对于希望确定沥青质浓度的给定溶液样品，使用二维NMR确定扩散性和弛豫时间，并计算扩散系数与弛豫时间的比率。 然后将该比率与模型一起使用，以便可以求解给定溶液样品中沥青质浓度的线性方程。
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12.发明申请SYSTEM AND METHOD FOR DETERMINING MOLECULAR STRUCTURES IN GEOLOGICAL FORMATIONS 有权用于确定地质构造中分子结构的系统和方法公开(公告)号：US20130342201A1
公开(公告)日：2013-12-26
申请号：US13530766
申请日：2012-06-22
申请人： Marcus Oliver Wigand , Boqin Sun
发明人： Marcus Oliver Wigand , Boqin Sun
IPC分类号： G01R33/44
CPC分类号： G01R33/4633 , A45C11/20 , A47J47/14 , G01N24/081
摘要： Molecular structures of organic molecules in a geological formation are determined. The organic molecules may include kerogen, coal, and/or other organic molecules. In particular, the technique implmented may operate to convert nuclear magnetic resonance data into a multi-dimensional space that permits identification of molecular structures through comparisons of intensity information across the multi-dimensional space with a cutoff map of the space. This may not only simplify the identification of molecular structures of the organic molecules, but also use exact mathematical model for mixture samples to derive both structural and dynamic parameters plus their variation.
摘要翻译： 确定地质构造中有机分子的分子结构。 有机分子可以包括油母质，煤和/或其它有机分子。 特别地，所涉及的技术可以操作以将核磁共振数据转换成多维空间，其允许通过多维空间中的强度信息与空间的截止图比较来识别分子结构。 这可能不仅简化了有机分子的分子结构的鉴定，而且还使用混合样品的精确数学模型来导出结构和动态参数加上它们的变化。
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13.发明申请METHOD FOR CREATING A 3D ROCK REPRESENTATION USING PETROPHYSICAL DATA 有权使用PETROPHYSICAL数据创建3D岩石表示的方法公开(公告)号：US20110066404A1
公开(公告)日：2011-03-17
申请号：US12561083
申请日：2009-09-16
申请人： Rafael Salazar-Tio , Boqin Sun
发明人： Rafael Salazar-Tio , Boqin Sun
CPC分类号： G01V11/00
摘要： The present invention enables the use of a global optimization method for performing joint-inversion of multiple petrophysical data sets, using forward models based on first principle of physics, to generate a 3D rock representation of a subsurface rock structure. The resulting 3D rock representation captures the internal structure, and honors the measured petrophysical properties, of the subsurface rock structure. The 3D rock representation can then be used to predict additional properties not considered in the inversion, to further characterize the subsurface rock structure.
摘要翻译： 本发明能够使用全局优化方法来使用基于物理学的第一原理的前向模型来执行多个岩石物理数据集的联合反演，以产生地下岩石结构的3D岩石表示。 所得到的3D岩石表征捕获了地下岩石结构的内部结构，并且证明了测量的岩石物理性质。 然后可以使用3D岩石表示来预测反演中未考虑的附加属性，以进一步表征地下岩石结构。
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公开(公告)号：US6166543A
公开(公告)日：2000-12-26
申请号：US936892
申请日：1997-09-25
CPC分类号： G01V3/32 , G01N24/081
摘要： The present invention relates generally to an apparatus and method for measuring nuclear magnetic resonance properties of an earth formation traversed by a borehole by generating gradient-echoes. The measurement can be made while drilling or using a wireline tool. The apparatus applies a static magnetic field, B.sub.a, in a volume of the formation which polarizes the nuclei of hydrogenous connate fluids within the formation. The apparatus applies a second magnetic field, B.sub.b, in a volume of the formation. The magnetic fields B.sub.a and B.sub.b are substantially orthogonal in the volume of the formation. A change in the polarity of the magnetic field, B.sub.b, reverses the direction of precession of the nuclei thereby generating a train of gradient-echoes. Each gradient-echo signal is transformed into the frequency domain and the signal frequency is mapped to a radial position in the volume of the formation in order to generate an image of the formation. Various properties of the formation, such as the effective diffusion coefficient of the formation fluid, longitudinal relaxation time, spin--spin relaxation time, and porosity can be estimated from the train of gradient-echoes.
摘要翻译： 本发明一般涉及通过产生梯度回波来测量由钻孔穿过的地层的核磁共振特性的装置和方法。 可以在钻孔或使用有线工具时进行测量。 该装置在地层的体积中施加静磁场Ba，其使地层内的含氢原生液体的核极化。 该装置在地层的体积中施加第二磁场Bb。 磁场Ba和Bb在地层的体积中基本正交。 磁场极性的变化Bb反转核的进动方向，从而产生一系列梯度回波。 每个梯度回波信号被变换成频域，并且信号频率被映射到地层体积中的径向位置，以便产生地层的图像。 可以从梯度回波序列估计地层的各种性质，例如地层流体的有效扩散系数，纵向松弛时间，自旋 - 自旋弛豫时间和孔隙度。
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15.发明授权公开(公告)号：US08818778B2
公开(公告)日：2014-08-26
申请号：US12561083
申请日：2009-09-16
申请人： Rafael Salazar-Tio , Boqin Sun
发明人： Rafael Salazar-Tio , Boqin Sun
CPC分类号： G01V11/00
摘要： The present invention enables the use of a global optimization method for performing joint-inversion of multiple petrophysical data sets, using forward models based on first principle of physics, to generate a 3D rock representation of a subsurface rock structure. The resulting 3D rock representation captures the internal structure, and honors the measured petrophysical properties, of the subsurface rock structure. The 3D rock representation can then be used to predict additional properties not considered in the inversion, to further characterize the subsurface rock structure.
摘要翻译： 本发明能够使用全局优化方法来使用基于物理学的第一原理的前向模型来执行多个岩石物理数据集的联合反演，以产生地下岩石结构的3D岩石表示。 所得到的3D岩石表征捕获了地下岩石结构的内部结构，并且证明了测量的岩石物理性质。 然后可以使用3D岩石表示来预测反演中未考虑的附加属性，以进一步表征地下岩石结构。
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16.发明申请METHOD FOR PROCESSING BOREHOLE LOGS TO ENHANCE THE CONTINUITY OF PHYSICAL PROPERTY MEASUREMENTS OF A SUBSURFACE REGION 审中-公开处理井眼日志的方法，以提高地表区域的物理性质测量的连续性公开(公告)号：US20100138157A1
公开(公告)日：2010-06-03
申请号：US12325639
申请日：2008-12-01
申请人： Boqin Sun , Keh-Jim Dunn
发明人： Boqin Sun , Keh-Jim Dunn
CPC分类号： G01V3/32
摘要： A computer-implemented method and system for processing subsurface logs to enhance the continuity of physical property measurements. The method includes obtaining a set of measurement signals along a spatial or time domain from at least one sensor tool moving through a borehole which has traversed through a subsurface region. The method additionally includes performing a global inversion of the set of measurement signals along the spatial or time domain to determine a set of physical properties of the subsurface region having a smooth variation along the spatial or time domain, wherein the set of physical properties can be utilized to determine characteristics of the subsurface region.
摘要翻译： 用于处理地下测井的计算机实现的方法和系统，以增强物理性能测量的连续性。 该方法包括从穿过穿过地下区域的钻孔的至少一个传感器工具获得沿着空间或时域的一组测量信号。 该方法还包括沿着空间或时域执行该组测量信号的全局反演，以确定具有沿空间或时域的平滑变化的地下区域的一组物理特性，其中物理属性集可以是 用于确定地下区域的特征。
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17.发明授权公开(公告)号：US06937014B2
公开(公告)日：2005-08-30
申请号：US10396941
申请日：2003-03-24
申请人： Boqin Sun , Keh-Jim Dunn
发明人： Boqin Sun , Keh-Jim Dunn
CPC分类号： G01N24/081 , G01V3/32
摘要： The present invention provides a method for obtaining a multi-dimensional proton density distribution from a system of nuclear spins. A plurality of nuclear magnetic resonance (NMR) data is acquired from a fluid containing porous medium having a system of nuclear spins. A multi-dimensional inversion is performed on the plurality of nuclear magnetic resonance data using an inversion algorithm to solve a mathematical problem employing a single composite kernel to arrive at a multi-dimensional proton density distribution. Ideally, the mathematical problem can be cast in the form of a Fredholm integral of the first kind wherein a two or more kernels can be reduced to a single composite kernel for ease of solution. Preferably, a series of conventional CPMG pulse sequences, using a conventional NMR tool, can be used to excite the system of nuclear spins. The present invention further includes a regression method which reduces computational efforts by retaining only those grid points, and preferably their neighboring grid points, which have non-zero values, during subsequent iterations of solving for the multi-dimensional proton density distribution. This regression process can be repeated until the density distribution is satisfactorily smooth.
摘要翻译： 本发明提供从核自旋系统获得多维质子密度分布的方法。 从具有核自旋系统的流体容纳多孔介质获取多个核磁共振（NMR）数据。 使用反演算法对多个核磁共振数据进行多维反演，以解决使用单个复合核来达到多维质子密度分布的数学问题。 理想情况下，数学问题可以以第一种Fredholm积分的形式投射，其中两个或多个内核可以简化为单个复合核，以方便解决。 优选地，使用常规NMR工具的一系列常规CPMG脉冲序列可用于激发核自旋系统。 本发明还包括一种回归方法，该方法通过在后续迭代求解多维质子密度分布的过程中仅保留具有非零值的那些网格点，最好是其相邻网格点来减少计算努力。 可以重复该回归过程，直到密度分布令人满意地平滑。
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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：US06522137B1
公开(公告)日：2003-02-18
申请号：US09605805
申请日：2000-06-28
IPC分类号： G01V300
CPC分类号： G01V3/32 , G01N24/081
摘要： A downhole NMR measurement apparatus for use in a borehole includes at least one magnet, at least one RF transmission coil, at least one gradient coil and circuitry. The magnet(s) establish a magnetic field in a region of a formation that at least partially surrounds the measurement apparatus. The RF transmission coils(s) transmit RF pulses pursuant to an NMR pulse sequence into the region to, in combination with the magnetic field, induce the generation of spin echo signals from a resonance volume within the region. The gradient coil(s) establish a pulsed gradient field in the resonance volume, and the circuitry is coupled to the gradient coil(s) to control the generation of the pulsed gradient field to phase encode the spin echo signals for purposes of high resolution imaging of the formation.
摘要翻译： 用于钻孔的井下NMR测量装置包括至少一个磁体，至少一个RF传输线圈，至少一个梯度线圈和电路。 磁体在至少部分地围绕测量装置的地层区域中建立磁场。 RF传输线圈根据NMR脉冲序列将RF脉冲发送到与该磁场相结合的区域中，从该区域内的共振体积引起自旋回波信号的产生。 梯度线圈在谐振体积中建立脉冲梯度场，并且电路耦合到梯度线圈以控制脉冲梯度场的产生以对自旋回波信号进行相位编码，以用于高分辨率成像 的形成。
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20.发明授权
公开(公告)号：US6121774A
公开(公告)日：2000-09-19
申请号：US102719
申请日：1998-06-22
申请人： Boqin Sun , Reza Taherian
发明人： Boqin Sun , Reza Taherian
CPC分类号： G01V3/32 , G01N24/081 , G01R33/4608
摘要： The present invention relates generally to a method for eliminating ringing while measuring nuclear magnetic resonance properties of an earth formation traversed by a borehole. The measurement can be made while drilling or using a wireline tool. During a first time period of a single pulse sequence, the measurement includes the desired spin-echoes and the undesired effects, that is, ringing, measurement noise, and baseline shift. During a second time period of the single pulse sequence, the spin-echoes are eliminated but not the undesired effects. Using the signal collected during the second time period, the signals measured during the first time period are corrected to eliminate the ringing component, measurement noise, and baseline shift.
摘要翻译： 本发明一般涉及在测量由钻孔穿过的地层的核磁共振特性的同时消除振铃的方法。 可以在钻孔或使用有线工具时进行测量。 在单个脉冲序列的第一时间段期间，测量包括期望的自旋回波和不期望的效应，即振铃，测量噪声和基线偏移。 在单个脉冲序列的第二时间段期间，自旋回波被消除，但不是不期望的效应。 使用在第二时间段期间收集的信号，校正在第一时间段期间测量的信号以消除振铃分量，测量噪声和基线偏移。
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