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1. (WO2017034588) DETERMINING SOURCES OF ERRONEOUS DOWNHOLE PREDICTIONS

Pub. No.:    WO/2017/034588    International Application No.:    PCT/US2015/047289
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Fri Aug 28 01:59:59 CEST 2015
IPC: E21B 44/00
G05B 19/02
G06F 19/00
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: WILLIAMS, Robert Lynn
PORTER, Aidan James
PEREIRA, Vitor Lopes
GOLLAPALLI, Joshua Samuel
Title: DETERMINING SOURCES OF ERRONEOUS DOWNHOLE PREDICTIONS
Abstract:
A system usable in a wellbore can include a processing device and a memory device in which instructions executable by the processing device are stored for causing the processing device to: generate multiple predicted values of a first parameter associated with a well environment or a wellbore operation; determine a first trend indicated by the multiple predicted values; receive, from a sensor, multiple measured values of a second parameter associated with the well environment or the wellbore operation; determine a second trend indicated by the multiple measured values; determine a difference between the first trend and the second trend or a rate of change of the difference; and in response to the difference exceeding a threshold or the rate of change exceeding another threshold, determine a source of the difference including at least one of an erroneous user input, an equipment failure, a wellbore event, or a model error.