公开(公告)号：US20160290942A1

公开(公告)日：2016-10-06

申请号：US14673043

申请日：2015-03-30

申请人： Haijing Wang ,  Scott Jeffrey Seltzer ,  Boqin Sun

发明人： Haijing Wang ,  Scott Jeffrey Seltzer ,  Boqin Sun

IPC分类号： G01N24/08

CPC分类号： G01N24/081 ,  G01N24/082 ,  G01R33/448

摘要： A disclosed method for characterizing gas adsorption on a rock sample includes: measuring a nuclear magnetic resonance (NMR) response of the rock as a function of surrounding gas pressure along an isotherm; transforming the NMR response to obtain a Langmuir pressure distribution of gas adsorption on the rock sample; and displaying the Langmuir pressure distribution. The Langmuir pressure distribution may be shown in one dimension (e.g., contribution to signal response versus Langmuir pressure), or may be combined with additional pressure-dependencies such as spin-lattice relaxation time (T1), spin-spin relaxation time (T2), and chemical shift (δ) to form a multi-dimensional distribution. The method can further include: identifying peaks in the Langmuir pressure distribution; and associating a gas storage mechanism and capacity with each peak. It may still further include: exposing the rock sample to a treatment fluid to obtain an altered sample; repeating said measuring and transforming operations with the altered sample; and comparing the Langmuir pressure distributions to determine effects of the treatment.

摘要翻译： 用于表征岩石样品上的气体吸附的公开方法包括：测量沿着等温线的围绕气体压力的函数的岩石的核磁共振（NMR）响应; 转化NMR响应，获得岩石样品上气体吸附的Langmuir压力分布; 并显示Langmuir压力分布。 Langmuir压力分布可以在一个维度上显示（例如，对信号响应对Langmuir压力的贡献），或者可以与额外的压力依赖性组合，例如自旋 - 晶格弛豫时间（T1），自旋 - 自旋弛豫时间（T2） ，和化学位移（δ）形成多维分布。 该方法还可以包括：识别Langmuir压力分布中的峰值; 并将气体存储机构和容量与每个峰值相关联。 它还可以进一步包括：将岩石样品暴露于处理液以获得改变的样品; 用改变的样品重复所述测量和变换操作; 并比较Langmuir压力分布来确定治疗效果。

公开(公告)号：US09851315B2

公开(公告)日：2017-12-26

申请号：US14567364

申请日：2014-12-11

申请人： Zheng Yang ,  Boqin Sun ,  Ajit Ramchandra Pradhan ,  Hussein Alboudwarej ,  Dengen Zhou

发明人： Zheng Yang ,  Boqin Sun ,  Ajit Ramchandra Pradhan ,  Hussein Alboudwarej ,  Dengen Zhou

IPC分类号： G01N24/08 ,  G01N33/24 ,  G01V3/32 ,  G01R33/50 ,  G01R33/44

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.

公开(公告)号：US09291690B2

公开(公告)日：2016-03-22

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： G01N24/08 ,  G01R33/46 ,  A47J47/14 ,  A45C11/20

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 implemented 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，所实施的技术可以操作以将核磁共振数据转换为多维空间，其允许通过多维空间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。

公开(公告)号：US09244188B2

公开(公告)日：2016-01-26

申请号：US13565994

申请日：2012-08-03

申请人： Boqin Sun ,  Emmanuel Toumelin

发明人： Boqin Sun ,  Emmanuel Toumelin

IPC分类号： G01V3/14

CPC分类号： G01V3/14 ,  Y02A90/344

摘要： A nuclear magnetic resonance relaxation time cutoff between results for a bound-water index of rock and a free-fluid index of the rock is determined. The determination is made based on measured and predicted values for permeability and/or wettability over a set of core plugs. The determination does not require a nuclear magnetic resonance operation performed on the core plugs under irreducible water saturation.

摘要翻译： 确定岩石的结合水指数和岩石的自由流体指数的结果之间的核磁共振弛豫时间截断。 基于在一组芯塞上的渗透性和/或润湿性的测量值和预测值进行测定。 该测定不需要在不可约的水饱和度下对芯​​塞执行核磁共振操作。

公开(公告)号：US06833698B2

公开(公告)日：2004-12-21

申请号：US10150284

申请日：2002-05-15

申请人： Boqin Sun ,  Keh-Jim Dunn

发明人： Boqin Sun ,  Keh-Jim Dunn

IPC分类号： G01V300

CPC分类号： G01R33/44 ,  G01N24/081 ,  G01N24/082 ,  G01V3/32

摘要： Novel pulse sequences are used to probe the properties of porous media, such as are found in subterranean formations and core samples. This use allows diffusion effects to be uncoupled from the overall T2 relaxation time of the sample. Properties such as internal field gradient and distribution of diffusion coefficients may be determined. A series of pulse sequences are applied to the media to be evaluated. The series of pulse sequences include first and second windows. The first windows include pulse sequences have varying characteristics, such as increasing echo spacing, while the second windows preferably utilize similar pulse sequences which have very small echo spacing. Apparent internal field gradient distribution and apparent diffusion coefficient may be determined as a function of T2 relaxation time. These properties are readily visualized in a two-dimensional map with a first axis being the apparent internal field gradient or alternatively the diffusion coefficient of pore fluids, a second axis being the T2 relaxation times, and the vertical amplitudes being proportional to the proton population. Other properties which may be determined from use of this method include porosity, pore size distribution, oil and water saturation, oil viscosity, oil wettability, and permeability. Also, a method for determining and plotting a T1-MAS 2D spectrum is provided where T1 relaxation time and chemical shift are plotted on x,y axes while intensity of proton population is displayed along a third axis.

摘要翻译： 使用新的脉冲序列来探测多孔介质的性质，例如在地下地层和核心样品中发现的。 这种使用允许扩散效应与样品的整体T2弛豫时间分离。 可以确定诸如内部场梯度和扩散系数的分布的属性。 将一系列脉冲序列应用于要评估的介质。 该脉冲序列包括第一和第二窗口。 第一窗口包括具有不同特征的脉冲序列，例如增加回波间隔，而第二窗口优选地利用具有非常小的回波间隔的类似脉冲序列。 可以将视觉内场梯度分布和表观扩散系数确定为T2弛豫时间的函数。 这些性质在具有第一轴是表观内场梯度或备选地，孔隙流体的扩散系数，第二轴是T2弛豫时间，垂直幅度与质子群体成比例的二维图中容易地可视化。 可以使用该方法确定的其它性质包括孔隙率，孔径分布，油和水饱和度，油粘度，油润湿性和渗透性。 此外，提供了用于确定和绘制T1-MAS 2D光谱的方法，其中在x，y轴上绘制T1弛豫时间和化学位移，同时沿着第三轴显示质子群的强度。

公开(公告)号：US06498484B1

公开(公告)日：2002-12-24

申请号：US09594640

申请日：2000-06-15

申请人： Boqin Sun ,  Reza Taherian

发明人： Boqin Sun ,  Reza Taherian

IPC分类号： G01V300

CPC分类号： G01V3/32 ,  G01N24/081

摘要： A method for reducing ringing in nuclear magnetic resonance measurements is disclosed. The method includes inducing a static magnetic field in a sensitive volume to orient nuclear magnetic spins of nuclei in the sensitive volume. The nuclear spins are reoriented by a first selected angle. An amplitude of the static magnetic field is then adjusted to cause a first selected phase shift in a spin echo signal measured subsequently to the reorienting by the first angle. The spins are then reoriented by a second selected angle, and a first spin echo signal is detected. After a selected wait time, reorienting by the first selected angle is repeated. Adjusting the amplitude of the static magnetic field is then repeated to cause a second selected phase shift in a subsequently measured spin echo. The first and second selected phase shifts have a difference between them of an odd numbered multiple of 180 degrees. Reorienting by the second selected and detecting a second spin echo signal are then repeated. Finally, a difference between the first spin echo signal and the second spin echo signal is determined. In one embodiment, the measuring of the first and second spin echoes is repeated a selected number of times, and the difference is calculated between time corresponding ones of the first and second spin echoes.

摘要翻译： 公开了一种减少核磁共振测量中振铃的方法。 该方法包括在敏感体积中诱导静磁场以定向敏感体积中的核的核磁自旋。 核旋转由第一选定角度重新定向。 然后调整静态磁场的振幅，以使得随着重新定向第一角度测量的自旋回波信号中的第一选择的相移。 然后将自旋重新定向第二选定角度，并且检测第一自旋回波信号。 在选定的等待时间之后，重新定向第一选定角度的方向。 然后重复调整静态磁场的振幅，以在随后测量的自旋回波中引起第二选择的相移。 第一和第二选择的相移在180度的奇数倍数之间具有差异。 然后重复第二选择的重定向并检测第二自旋回波信号。 最后，确定第一自旋回波信号和第二自旋回波信号之间的差异。 在一个实施例中，重复第一和第二自旋回波的测量次数，并且在第一和第二自旋回波的时间对应的时间之间计算差值。

公开(公告)号：US09482631B2

公开(公告)日：2016-11-01

申请号：US13894150

申请日：2013-05-14

申请人： Zheng Yang ,  Boqin Sun ,  John S. Zintsmaster ,  Gerald Latorraca ,  Ajit R. Pradhan

发明人： Zheng Yang ,  Boqin Sun ,  John S. Zintsmaster ,  Gerald Latorraca ,  Ajit R. Pradhan

IPC分类号： G01N24/08 ,  G01R33/30 ,  G01V3/14 ,  G01R33/44 ,  G01V3/32

CPC分类号： G01N24/081 ,  G01R33/305 ,  G01R33/448 ,  G01V3/14 ,  G01V3/32

摘要： A core sample holder assembly for performing a laboratory magnetic resonance measurement of a core sample taken from a hydrocarbon containing formation is provided. The assembly comprises a pressure chamber provided by a hull and one or more flanges are sealingly coupled with the hull. A flexible core sample holder sleeve is arranged within the pressure chamber and is sealingly coupled with at least one of the flanges. An overburden fluid injection port is in fluid communication with an annular space between the hull and the flexible sleeve and is configured to inject overburden fluid into an annular space between the hull and the flexible sleeve. A pressure regulator is configured to maintain the overburden fluid in the annular space at an elevated pressure. A radio-frequency antenna, within the pressure chamber and wrapped around the sample holder sleeve, is configured to receive an electromagnetic-signal from the core sample. In use, the core sample is arranged substantially within the sleeve.

摘要翻译： 提供了一种用于对从含烃地层取出的核心样品进行实验室磁共振测量的核心样品架组件。 组件包括由船体提供的压力室，并且一个或多个凸缘与船体密封地联接。 柔性芯样品保持器套筒布置在压力室内并与至少一个凸缘密封连接。 上覆层流体注入口与船体和柔性套管之间的环形空间流体连通，并且构造成将覆盖层流体注入到船体和柔性套筒之间的环形空间中。 压力调节器构造成在环境空间中的上覆层流体在升高的压力下保持。 在压力室内并缠绕在样品保持器套筒周围的射频天线被配置为从芯样品接收电磁信号。 在使用中，芯样本基本上布置在套筒内。

公开(公告)号：US20140035574A1

公开(公告)日：2014-02-06

申请号：US13565994

申请日：2012-08-03

申请人： Boqin Sun ,  Emmanuel Toumelin

发明人： Boqin Sun ,  Emmanuel Toumelin

IPC分类号： G01V3/14

CPC分类号： G01V3/14 ,  Y02A90/344

摘要： A nuclear magnetic resonance relaxation time cutoff between results for a bound-water index of rock and a free-fluid index of the rock is determined. The determination is made based on measured and predicted values for permeability and/or wettability over a set of core plugs. The determination does not require a nuclear magnetic resonance operation performed on the core plugs under irreducible water saturation.

摘要翻译： 确定岩石的结合水指数和岩石的自由流体指数的结果之间的核磁共振弛豫时间截断。 基于在一组芯塞上的渗透性和/或润湿性的测量值和预测值进行测定。 该测定不需要在不可约的水饱和度下对芯​​塞执行核磁共振操作。

公开(公告)号：US20090157350A1

公开(公告)日：2009-06-18

申请号：US11954556

申请日：2007-12-12

申请人： Rafael Salazar-Tio ,  Boqin Sun

发明人： Rafael Salazar-Tio ,  Boqin Sun

IPC分类号： G06F17/18 ,  G01R33/20

CPC分类号： G01R33/5617 ,  G01N24/081 ,  G01R33/5608 ,  G01V3/32

摘要： A computer-implemented method enables a proton density distribution to be obtained. In one embodiment, the method comprises acquiring nuclear magnetic resonance data from porous media; inverting the nuclear magnetic resonance data via a global optimization algorithm to determine a proton density distribution within the porous media; and outputting the determined proton density distribution.

摘要翻译： 计算机实现的方法能够获得质子密度分布。 在一个实施例中，该方法包括从多孔介质获取核磁共振数据; 通过全局优化算法反转核磁共振数据，以确定多孔介质内的质子密度分布; 并输出确定的质子密度分布。

公开(公告)号：US06781371B2

公开(公告)日：2004-08-24

申请号：US10064994

申请日：2002-09-06

申请人： Reza Taherian ,  Boqin Sun ,  Abdurrahman Sezginer

发明人： Reza Taherian ,  Boqin Sun ,  Abdurrahman Sezginer

IPC分类号： G01V300

CPC分类号： G01N24/081 ,  G01V3/32

摘要： A high vertical resolution antenna design is provided for use in an NMR measurement apparatus. Multiple coils are situated along the length of a magnet. A primary coil is energized to cause an oscillating magnetic field in a portion of earth formation surrounding a borehole. A secondary coil having smaller dimensions than the primary coil is operated to receive spin echoes from a depth of investigation associated with the secondary coil. A distance sufficient to minimize electrical coupling separates the coils. The separation distance can be reduced by selecting a secondary coil with orthogonal polarization to the primary coil. Alternatively, a cross coil configuration can be implemented where the orthogonal secondary coil at least partially overlaps the primary coil, thereby reducing the overall length necessary for the polarizing magnet.

摘要翻译： 提供了用于NMR测量装置的高垂直分辨率天线设计。 多个线圈沿着磁体的长度设置。 初级线圈被通电以在围绕钻孔的地层的一部分中产生振荡磁场。 操作具有小于初级线圈的尺寸的次级线圈以从与次级线圈相关联的调查深度接收自旋回波。 足以使电耦合最小化的距离分离线圈。 可以通过选择具有与初级线圈的正交极化的次级线圈来减小间隔距离。 或者，可以实现交叉线圈配置，其中正交次级线圈至少部分地与初级线圈重叠，从而减小极化磁体所需的总长度。