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公开(公告)号：US07026814B2
公开(公告)日：2006-04-11
申请号：US10742481
申请日：2003-12-19
IPC分类号： G01V3/00
CPC分类号： G01N24/081 , G01R33/3628
摘要： A method for tuning a nuclear magnetic resonance (NMR) tool having an operating frequency and equipped with an antenna, is disclosed comprising: (a) transmitting a rf magnetic field to a sample under investigation; (b) receiving an NMR signal from the sample within a detection window; (c) determining mistuning of said antenna relative to said operating frequency; (d) analyzing the received echo signal to determine mistuning of the received signal from the operating frequency. The mistuning of the received signals from the operating frequency may be determined by analyzing any changes in phase of the echo along the echo signal. The antenna tuning process may be automated by measuring calibrated signal amplitudes at more than one frequency and identifying a maximum amplitude. The system tuning may be maintained by repeating (a) through-(d) while operating the tool and implementing a feedback loop.
摘要翻译： 公开了一种用于调谐具有工作频率并配备有天线的核磁共振（NMR）工具的方法，包括：（a）将RF磁场传送到被调查的样品; （b）在检测窗口内从样品接收NMR信号; （c）确定所述天线相对于所述工作频率的失谐; （d）分析所接收的回波信号以确定来自工作频率的接收信号的失谐。 可以通过分析沿回波信号的回波相位的任何变化来确定来自工作频率的接收信号的失谐。 天线调谐过程可以通过在多于一个频率上测量校准信号幅度并识别最大振幅来自动化。 在操作工具并实施反馈回路时，可以通过重复（a）至（d）来维持系统调整。
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公开(公告)号：US08441269B2
公开(公告)日：2013-05-14
申请号：US12721845
申请日：2010-03-11
申请人： Chanh Cao Minh , Ahmad Madjidi
发明人： Chanh Cao Minh , Ahmad Madjidi
CPC分类号： G01V11/00
摘要： The present disclosure relates to a method to determine a characteristic of a subsurface formation using a downhole logging tool. A downhole logging tool having the ability to make substantially concurrent disparate measurements on the subsurface formation is provided and substantially concurrent disparate measurements on the formation using the downhole logging tool are made. Those measurements are used to solve a system of equations simultaneously and the solution to the system of equations is used to determine the characteristic of the subsurface formation.
摘要翻译： 本公开涉及一种使用井下测井工具确定地下地层特征的方法。 提供了具有对地下地层进行基本上同时不同的测量的能力的井下测井工具，并且使用井下测井工具对地层进行基本上同时的不同的测量。 这些测量用于同时求解方程组，并且使用方程组方程来确定地下构造的特征。
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公开(公告)号：US20150219782A1
公开(公告)日：2015-08-06
申请号：US14119708
申请日：2012-08-09
申请人： Ravinath Kausik Kadayam Viswanathan , Chanh Cao Minh , Ridvan Akkurt , Baarinadh Vissapragada , Yi-Qiao Song , Lukasz Zielinski
发明人： Ravinath Kausik Kadayam Viswanathan , Chanh Cao Minh , Ridvan Akkurt , Baarinadh Vissapragada , Yi-Qiao Song , Lukasz Zielinski
CPC分类号： G01V3/14 , G01N24/081 , G01R33/448 , G01R33/56341 , G01V3/32 , G01V3/38
摘要： Apparatus and methods for characterizing hydrocarbons in a subterranean formation including sending and measuring NMR signals; analyzing the signals to form a distribution; and estimating a property of a formation from the distribution, wherein the sending comprises pulse sequences configured for a formation pore size, and wherein the computing comprises porosity. Apparatus and methods for characterizing hydrocarbons in a subterranean formation including sending and measuring NMR signals; analyzing the signals to form a distribution; and estimating a property of a formation from the distribution, wherein the formation comprises a distribution of pore sizes of about 10 nm or more, and wherein the computing comprises natural gas composition.
摘要翻译： 用于表征地下地层中的烃的装置和方法，包括发送和测量NMR信号; 分析信号以形成分布; 以及从所述分布估计地层的属性，其中所述发送包括被配置用于地层孔径的脉冲序列，并且其中所述计算包括多孔性。 用于表征地下地层中的烃的装置和方法，包括发送和测量NMR信号; 分析信号以形成分布; 以及从所述分布估计地层的性质，其中所述地层包括约10nm或更大的孔径分布，并且其中所述计算包括天然气组成。
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公开(公告)号：US08736263B2
公开(公告)日：2014-05-27
申请号：US12669590
申请日：2008-07-24
申请人： Chanh Cao Minh
发明人： Chanh Cao Minh
IPC分类号： G01V3/00
CPC分类号： G01V3/32 , G01N24/081 , G01R33/3808 , G01R33/448 , G01R33/4808
摘要： A technique utilizes the acquisition of data via nuclear magnetic resonance at multiple depths of investigation in a well region. The acquired data is processed to estimate variable fluid mixture densities at different radial depths. The variable fluid mixture densities and a radial response from a density tool, for example, can be used to calculate an effective fluid mixture density and used to interpret density logs. Other logs such as neutron log, induction resistivity log, and dielectric permittivity log can be combined with NMR. For these tools a corresponding effective formation property can be calculated and used to determine other formation characteristics, such as total porosity, total density, dielectric permittivity, electric resistivity, and formation characteristics derivable from these.
摘要翻译： 一种技术利用在井区域的多个调查深度通过核磁共振获取数据。 处理所获取的数据以估计不同径向深度处的可变流体混合物密度。 例如，可以使用来自密度工具的可变流体混合物密度和径向响应来计算有效的流体混合物密度并用于解释密度测井。 其他原子如中子对数，感应电阻率对数和介电常数对数可与NMR结合。 对于这些工具，可以计算相应的有效形成性质并用于确定其它形成特征，例如总孔隙率，总密度，介电常数，电阻率和可从其得到的形成特征。
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公开(公告)号：US08120357B2
公开(公告)日：2012-02-21
申请号：US12464187
申请日：2009-05-12
申请人： Wicher Wichers , Chanh Cao Minh , Bei Gao , Peter Weinheber , Cosan Ayan , Oliver C. Mullins
发明人： Wicher Wichers , Chanh Cao Minh , Bei Gao , Peter Weinheber , Cosan Ayan , Oliver C. Mullins
IPC分类号： G01V3/00
CPC分类号： G01V11/00
摘要： A method for determining fluids in a formation. The method includes obtaining open hole measurements for a borehole in the formation; identifying points in the borehole from which to obtain pressure measurements using the open hole measurements; obtaining pressure measurements at the identified points in the borehole; applying an excess pressure technique to the pressure measurements to identify a plurality of pressure compartments in the borehole; characterizing fluid in each of the plurality of compartments; and developing a drilling plan based on characterization of fluids in each of the plurality of compartments.
摘要翻译： 一种用于确定地层中流体的方法。 该方法包括获得地层钻孔的露天测量; 识别钻孔中的点，使用露点测量获得压力测量值; 在钻孔中识别的点获得压力测量; 对压力测量应用过压技术以识别钻孔中的多个压力隔室; 表征所述多个隔室中的每一个中的流体; 以及基于多个隔室中的每一个中的流体的表征来开发钻井计划。
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6.发明授权公开(公告)号：US07893692B2
公开(公告)日：2011-02-22
申请号：US12263570
申请日：2008-11-03
申请人： Chanh Cao Minh
发明人： Chanh Cao Minh
IPC分类号： G01V3/00
CPC分类号： G01V3/32 , Y02A90/344
摘要： A method for estimating fluid productivity of a subsurface rock formation from within a wellbore drilled therethrough includes measuring a nuclear magnetic resonance property of the formation at a plurality of lateral depths therein. The measured nuclear magnetic resonance property is used to estimate the fluid productivity.
摘要翻译： 用于从穿过的井眼内部估计地下岩层的流体生产率的方法包括测量其中多个横向深度处的地层的核磁共振特性。 测量的核磁共振性质用于估计流体生产率。
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7.发明授权Estimating permeability without determinating a distribution of relaxation times 有权估计渗透率而不确定松弛时间的分布公开(公告)号：US06559639B2
公开(公告)日：2003-05-06
申请号：US09397581
申请日：1999-09-16
IPC分类号： G01V300
CPC分类号： G01N24/081 , G01R33/4625 , G01V3/32
摘要： A permeability estimation technique for use with spin echo signals that are received from a sample includes summing indications of the amplitudes of the spin echo signals. The results of the summing are used to determine an indication of a permeability of the sample, without using a distribution of relaxation times in the determination. The products of indications of the amplitudes of the spin echo signals may be summed, and the results of the summing may be used to determine an indication of a permeability of the sample, without using a distribution of relaxation times in the determination.
摘要翻译： 与从样本接收的自旋回波信号一起使用的磁导率估计技术包括自旋回波信号幅度的相加指示。 求和的结果用于确定样品的渗透性的指示，而不使用在测定中松弛时间的分布。 可以将自旋回波信号的振幅的指示的乘积相加，并且求和的结果可以用于确定样品的渗透性的指示，而不使用确定中的松弛时间的分布。
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8.发明授权公开(公告)号：US07924001B2
公开(公告)日：2011-04-12
申请号：US12423469
申请日：2009-04-14
申请人： Chanh Cao Minh
发明人： Chanh Cao Minh
IPC分类号： G01V3/00
CPC分类号： G01V3/32 , G01N24/081 , G01R33/50 , G01R33/56341
摘要： A method for determining oil viscosity and continuous gas-oil-ratio (GOR) from nuclear magnetic resonance logs (NMR). The method includes obtaining a set of NMR data of a portion of the subterranean formation from inside the wellbore without acquiring formation fluid sample; isolating a quantitative reservoir fluid information associated with oil from oil based mud (OBM) using radial profiling of the set of NMR data, wherein the OBM is used for extracting fluid from the underground reservoir; determining GOR related information associated with the portion of the subterranean formation from the quantitative reservoir fluid information associated with oil, wherein the GOR related information is determined based on a predetermined model; and performing operations for the oilfield based on the GOR related information.
摘要翻译： 一种从核磁共振测井（NMR）测定油粘度和连续瓦斯油比（GOR）的方法。 该方法包括从井筒内部获取一部分地层的NMR数据，而不获取地层流体样品; 使用所述一组NMR数据的径向剖面来分离与油基泥浆（OBM）相关的油的定量储层流体信息，其中所述OBM用于从所述地下储层中提取流体; 根据与油相关的定量油藏流体信息确定与地下地层部分相关的GOR相关信息，其中基于预定模型确定GOR相关信息; 并根据GOR相关信息对油田进行作业。
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公开(公告)号：US20110004408A1
公开(公告)日：2011-01-06
申请号：US12797182
申请日：2010-06-09
CPC分类号： G01V11/00
摘要： The present disclosure relates to a method to determine the capture cross-section of a subsurface formation at a desired depth in the formation. A database of Sigma values for known lithologies, porosities, and salinities is provided, and multiple Sigma measurements are obtained from a downhole logging tool. Within the database, Sigma values are interpolated to determine the respective depths of investigation of the multiple Sigma measurements. A monotonic function is fitted to the multiple Sigma measurements at the determined depths of investigation, and the capture cross-section of the subsurface formation at any desired depth in the formation is determined using the fitted function. Similarly, a system to determine the capture cross-section of a subsurface formation at a desired depth in the formation and/or a depth of invasion of drilling fluids is also disclosed.
摘要翻译： 本公开涉及确定地层中所需深度处的地下地层的捕获横截面的方法。 提供了用于已知岩性，孔隙度和盐度的Sigma值的数据库，并且从井下测井工具获得多个Sigma测量。 在数据库中，内插Sigma值以确定多个Sigma测量的相应调查深度。 在确定的调查深度上将多元西格玛测量拟合为单调函数，并且使用拟合函数确定地层中任何所需深度处的地下地层的捕获截面。 类似地，还公开了一种用于确定地层中所需深度和/或钻井液侵入深度的地下地层的捕获横截面的系统。
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10.发明申请公开(公告)号：US20100109664A1
公开(公告)日：2010-05-06
申请号：US12263570
申请日：2008-11-03
申请人： Chanh Cao Minh
发明人： Chanh Cao Minh
IPC分类号： G01V3/32
CPC分类号： G01V3/32 , Y02A90/344
摘要： A method for estimating fluid productivity of a subsurface rock formation from within a wellbore drilled therethrough includes measuring a nuclear magnetic resonance property of the formation at a plurality of lateral depths therein. The measured nuclear magnetic resonance property is used to estimate the fluid productivity.
摘要翻译： 用于从穿过的井眼内部估计地下岩层的流体生产率的方法包括测量其中多个横向深度处的地层的核磁共振特性。 测量的核磁共振性质用于估计流体生产率。
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