公开(公告)号：US20180203151A1

公开(公告)日：2018-07-19

申请号：US15406308

申请日：2017-01-13

Applicant: BAKER HUGHES INCORPORATED

Inventor： BABAK KOUCHMESHKY ,  OTTO N. FANINI ,  ALBERTO MEZZATESTA

IPC: G01V3/26 ,  G01V3/38

CPC classification number: G01V3/26 ,  G01V3/30 ,  G01V3/38

Abstract: Methods and apparatus for evaluating an earth formation intersected by a borehole. Methods include using at least one transmitter to generate electromagnetic (EM) waves propagating through the formation; generating measurement signals at at least one receiver responsive to the propagating EM waves; taking a plurality of propagation measurements from the measurement signals representative of the propagating EM waves, where each propagation measurement of the plurality comprises at least one of: i) a relative phase shift between a first wave of the plurality of propagating EM waves and a second wave of the plurality of propagating EM waves; and ii) a relative attenuation between a first wave of the plurality of propagating EM waves and a second wave of the plurality of propagating EM waves; and performing a single inversion which uses the plurality of propagation measurements as input and generates at least one petrophysical parameter as output.