公开(公告)号：US07227129B2

公开(公告)日：2007-06-05

申请号：US11158500

申请日：2005-06-22

申请人： Stephen Riley ,  Benoit J. Guivarch ,  Darryl E. Trcka ,  David M. Chace

发明人： Stephen Riley ,  Benoit J. Guivarch ,  Darryl E. Trcka ,  David M. Chace

IPC分类号： G01V5/10

CPC分类号： E21B47/1015 ,  E21B43/126 ,  E21B47/0005 ,  G01F1/7088 ,  G01P5/20

摘要： A pulsed neutron source irradiates an earth formation. The irradiation produces N16 from O16 in a fluid in the borehole, and the gamma rays produced by the subsequent decay of N16 are detected by a plurality of spaced apart detectors. The count rates of the detectors are accumulated over a time sampling interval to produce temporal signals. Processing of the temporal signals using correlation, differentiation and/or semblance techniques is used for determination of the flow velocity of one or more fluids in the borehole.

摘要翻译： 脉冲中子源照射地层。 照射在钻孔中的流体中从O 16产生N 16，并且检测由随后的N 16衰变产生的γ射线 通过多个间隔开的检测器。 检测器的计数率在时间采样间隔内累积以产生时间信号。 使用相关，微分和/或相似性技术处理时间信号用于确定钻孔中一种或多种流体的流速。

公开(公告)号：US07186971B2

公开(公告)日：2007-03-06

申请号：US10879620

申请日：2004-06-29

申请人： Stephen Riley ,  Benoit J. Guivarch ,  Darryl E. Trcka ,  David M. Chace

发明人： Stephen Riley ,  Benoit J. Guivarch ,  Darryl E. Trcka ,  David M. Chace

IPC分类号： G01V5/10

CPC分类号： E21B47/1015 ,  E21B43/126 ,  E21B47/0005 ,  G01F1/7088 ,  G01P5/20

摘要： A pulsed neutron source irradiates an earth formation. The irradiation produces N16 from O16 in a fluid in the borehole, and the gamma rays produced by the subsequent decay of N16 are detected by a plurality of spaced apart detectors. The count rates of the detectors are accumulated over a time sampling interval to produce temporal signals. Processing of the temporal signals using correlation, differentiation and/or semblance techniques is used for determination of the flow velocity of one or more fluids in the borehole.

公开(公告)号：US4612439A

公开(公告)日：1986-09-16

申请号：US581637

申请日：1984-02-21

申请人： David M. Chace

发明人： David M. Chace

IPC分类号： G01V5/06

CPC分类号： G01V5/06

摘要： Method and apparatus for evaluating subsurface formations utilizing natural gamma radiation spectral measurements. The total counts measurement is processed to derive measurements relating to the concentrations of potassium-40, uranium and thorium. A relative concentration factor of uranium to the energy spectra is derived and the total counts measurement is compensated by the uranium factor to remove the effects of uranium.

摘要翻译： 使用自然伽马辐射光谱测量法评估地下构造的方法和装置。 对总计数进行处理，以得出与-40，铀和钍的浓度有关的测量结果。 导出铀对能谱的相对浓度因子，并通过铀因子来补偿总计数，以消除铀的影响。

公开(公告)号：US5949069A

公开(公告)日：1999-09-07

申请号：US970253

申请日：1997-11-14

申请人： David M. Chace ,  Darryl E. Trcka ,  Rene W. Mayer

发明人： David M. Chace ,  Darryl E. Trcka ,  Rene W. Mayer

IPC分类号： E21B47/10 ,  E21B49/08 ,  G01F1/704 ,  G01N22/00 ,  G01V5/10 ,  G01F1/00

CPC分类号： E21B49/087 ,  E21B47/1015 ,  G01F1/7042 ,  G01N22/00

摘要： A method for determining a volume fraction of water moving in a predetermined direction along a highly inclined conduit. The method includes measuring a fractional volume of water occupying the conduit at a plurality of locations along the conduit. An oxygen activation velocity of the water flowing in the conduit is determined at a plurality of locations along the conduit. A counting rate of a gamma ray detector used to measure oxygen activation is normalized with respect to the measured fractional volume of water. The normalized count rates of the gamma ray detector are characterized with respect to a relative velocity between the water and the detector. The step of characterizing is performed in portions of the conduit which are sloped so that gravity acts on the water along the predetermined direction. A fraction of the characterized counting rate represented by the oxygen activation counting rates measured along the conduit is determined. The fraction represents the fractional volume of water moving in the predetermined direction.

摘要翻译： 一种用于确定沿着高度倾斜的导管沿预定方向移动的水的体积分数的方法。 该方法包括测量沿着导管在多个位置处占据导管的水的分数体积。 在导管的多个位置确定在导管中流动的水的氧活化速度。 用于测量氧激活的伽马射线检测器的计数率相对于测量的水分数体积被归一化。 相对于水和检测器之间的相对速度来表征伽马射线探测器的归一化计数率。 特征化的步骤在导管的部分倾斜的部分进行，使得重力沿预定方向作用在水面上。 确定由导管测量的氧激活计数率所表征的计数速度的一部分。 分数表示在预定方向上移动的水的分数体积。