Downhole fluid typing

US10162081B2 · kind B2 · utility

Assignee

• Baker Hughes, a GE company, LLC · US

Inventors

• Tobias Kischkat · Celle, DE
• Eick Niemeyer · Braunschweig, DE
• Stefan Sroka · Celle, DE

Key dates

• Filing date: Aug 6, 2015
• Grant date: Dec 25, 2018
• Expiry date: Jul 17, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V2210/667
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Systems, devices and methods for evaluating a volume of interest of an earth formation. The method may include modeling the volume as being in one of two states using a plurality of measurements corresponding to a plurality of measurement types, and may include assigning a relative credence indicator value to each measurement in dependence upon the corresponding measurement value and using the relative credence indicator value for each of the plurality of measurements to estimate the state of the volume by estimating the state of the volume using a state indicator value derived from the relative credence indicator values. The first state of the two states may correspond with presence of a condition associated with the formation, and the second state of the two states may correspond with absence of the condition. The condition may comprise presence of a fluid in the formation having a selected fluid type.