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    • 41. 发明授权
    • Method for eliminating ringing during a nuclear magnetic resonance
measurement
    • 在核磁共振测量期间消除振铃的方法
    • US6121774A
    • 2000-09-19
    • US102719
    • 1998-06-22
    • Boqin SunReza Taherian
    • Boqin SunReza Taherian
    • G01R33/44G01R33/46G01V3/32G01V3/00
    • G01V3/32G01N24/081G01R33/4608
    • 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.
    • 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。
    • 43. 发明授权
    • Pore pressure measurement in low-permeability and impermeable materials
    • 低渗透和不渗透材料的孔隙压力测量
    • US09016119B2
    • 2015-04-28
    • US13535218
    • 2012-06-27
    • Mohammed BadriReza Taherian
    • Mohammed BadriReza Taherian
    • E21B47/10E21B47/06E21B49/00
    • E21B47/06E21B49/008
    • Systems and methods are described for calculating pore pressure in a porous formation such as shale gas having substantially disconnected pore spaces. In some described examples, an NMR logging tool with at least two depths of investigation (DOIs) is used. The deeper DOI can be used to sample the shale gas that has not been perturbed by the drilling process, for example, and contains the gas at connate pressure. The shallow DOI can be used to sample shale gas that has been perturbed, and has lost at least part of its gas content. The micro cracks that have been formed in the shallow location (closer to the borehole) allow for injection of gas into the formation at known pressures while measuring the NMR response. The connate pore pressure can then be calculated for the deeper location based on the NMR response to the known pressure increase.
    • 描述了用于计算孔隙压力的系统和方法,所述多孔地层例如具有基本上断开的孔​​隙的页岩气。 在一些描述的实施例中,使用具有至少两个调查深度(DOI)的NMR测井工具。 较深的DOI可用于对未经钻井过程扰动的页岩气进行采样,例如,含有合成压力下的气体。 浅DOI可用于对已经扰动的页岩气进行采样,并且至少损失了部分气体含量。 在较浅的位置(更靠近钻孔)形成的微裂纹允许在测量NMR响应时将气体注入已知压力的地层中。 然后可以基于对已知压力增加的NMR响应来计算更深的位置的原生孔隙压力。
    • 45. 发明授权
    • Measurement of formation parameters using rotating directional EM antenna
    • 使用旋转方向EM天线测量地层参数
    • US08922215B2
    • 2014-12-30
    • US13468274
    • 2012-05-10
    • Jean SeydouxReza Taherian
    • Jean SeydouxReza Taherian
    • G01V3/08G01V3/30E21B7/04E21B47/02
    • G01V3/30E21B49/00
    • A logging tool and method to make subsurface measurements is disclosed, wherein the tool is placed within a borehole penetrating a formation. The tool has a transmitter antenna and a receiver antenna spaced apart along a longitudinal axis of the tool, and at least one of the transmitter or receiver antennas has a dipole moment that is non-coaxial with the longitudinal axis of the tool. The at least one non-coaxial antenna can rotate relative to the other antenna. Energy is transmitted from the transmitter antenna and a signal associated with the transmitted energy is measured at the receiver antenna while the at least one non-coaxial antenna rotates relative to the other antenna.
    • 公开了一种用于进行地下测量的测井工具和方法,其中该工具被放置在穿透地层的钻孔内。 该工具具有沿工具的纵向轴线间隔开的发射器天线和接收器天线,并且发射器或接收器天线中的至少一个具有与工具的纵向轴线不同轴的偶极矩。 所述至少一个非同轴天线可以相对于另一个天线旋转。 从发射机天线发送能量,并且在接收机天线处测量与发射的能量相关联的信号,同时至少一个非同轴天线相对于另一个天线旋转。
    • 50. 发明授权
    • Measurement of formation parameters using rotating directional EM antenna
    • 使用旋转方向EM天线测量地层参数
    • US08193813B2
    • 2012-06-05
    • US12136858
    • 2008-06-11
    • Jean SeydouxReza Taherian
    • Jean SeydouxReza Taherian
    • G01V3/08G01V3/30
    • G01V3/30E21B49/00
    • A logging tool and method to make subsurface measurements is disclosed, wherein the tool is placed within a borehole penetrating a formation. The tool has a transmitter antenna and a receiver antenna spaced apart along a longitudinal axis of the tool, and at least one of the transmitter or receiver antennas has a dipole moment that is non-coaxial with the longitudinal axis of the tool. The at least one non-coaxial antenna can rotate relative to the other antenna. Energy is transmitted from the transmitter antenna and a signal associated with the transmitted energy is measured at the receiver antenna while the at least one non-coaxial antenna rotates relative to the other antenna.
    • 公开了一种用于进行地下测量的测井工具和方法,其中该工具被放置在穿透地层的钻孔内。 该工具具有沿工具的纵向轴线间隔开的发射器天线和接收器天线,并且发射器或接收器天线中的至少一个具有与工具的纵向轴线不同轴的偶极矩。 所述至少一个非同轴天线可以相对于另一个天线旋转。 从发射机天线发送能量,并且在接收机天线处测量与发射的能量相关联的信号,同时至少一个非同轴天线相对于另一个天线旋转。