A pulsed neutron source irradiates an earth formation. The irradiation produces N<SUP>16</SUP> from O<SUP>16</SUP> in a fluid in the borehole, and the gamma rays produced by the subsequent decay of N<SUP>16</SUP> 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.
申请公布号
WO2006004740(A3)
申请公布日期
2006.06.01
申请号
WO2005US22908
申请日期
2005.06.27
申请人
BAKER HUGHES INCORPORATED;RILEY, STEPHEN;GUIVARCH, BENOIT, J.;TRCK, DARRYL;CHASE, DAVID, M.
发明人
RILEY, STEPHEN;GUIVARCH, BENOIT, J.;TRCK, DARRYL;CHASE, DAVID, M.