公开(公告)号：US11767753B2

公开(公告)日：2023-09-26

申请号：US16679941

申请日：2019-11-11

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Brian C. Seabrook ,  Ted A. Long ,  Charles J. Mart

IPC: E21B47/103 ,  G01M3/00 ,  E21B47/04

CPC classification number: E21B47/103 ,  E21B47/04 ,  G01M3/002

Abstract: A method and apparatus are provided for determining movement of a fluid into or out of a subsurface wellbore, to thereby enable accurate allocation of fluids being produced by or injected into each of several zones of the wellbore. A temperature change is effected in the fluid in a semi-continuous or pulsed manner at one or more locations in the wellbore. A temperature of the fluid is measured at one or more sensing locations downstream of the location of the temperature change. A time of flight model is used to determine, for a plurality of points of interest, a fluid flow direction, bulk flow rate and/or a cumulative flow rate contribution.