公开(公告)号：US10481291B2

公开(公告)日：2019-11-19

申请号：US15448183

申请日：2017-03-02

Applicant: SHELL OIL COMPANY

Inventor： Matthias Appel ,  Benjamin Charles Anger ,  Hilko de Jong ,  Lynn Faith Gladden ,  Michael David Mantle ,  Andrew John Sederman ,  Nicholas Philip Ramskill

IPC: G01V3/00 ,  G01V3/32 ,  E21B47/00 ,  E21B49/06 ,  E21B49/10 ,  G01N24/08 ,  G01R33/48 ,  G01R33/561 ,  E21B47/06

Abstract: An imager and method for imaging fluid of a subsurface formation is disclosed. The imager includes a housing having a sidewall defining a passage to receive a core sample of the subsurface formation therethrough. The housing is positioned in a downhole tool and has a fluid inlet to receive fluid from the subsurface formation into the passage. The imager also includes a permanent magnet positioned in the sidewall of the housing, a radio frequency coil positioned in the sidewall of the housing between the permanent magnet and the passage, a gradient field in the sidewall of the housing between the permanent magnet and the radio frequency coil, and a chemically-selective imager. The chemically-selective imager is operatively connected to the radio frequency coil to selectively pulse frequencies according to a pulse sequence whereby individual fluid measurements of the sample are generated.