Mesure de la vitesse d'écoulement de boue utilisant des neutrons pulsés

Messung der Strömungsgeschwindigkeit von Spülung mittels gepulster Neutronen

Measuring mud flow velocity using pulsed neutrons

Abstract

The invention relates to methods and apparatus for determining downhole mud flow rates and other downhole parameters. A method for determining a downhole parameter includes operating a pulsed neutron generator (6), pulsing the pulsed neutron generator (6) off, detecting a substantially unactivated drilling fluid slug at a known distance (d) from the pulsed neutron generator (6), and determining a time-of-flight (t) for the unactivated drilling fluid slug to travel from the pulsed neutron generator (6) to a detection point.

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NO-Patent Citations (1)

    Title
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    GB-2399111-BOctober 05, 2005Schlumberger HoldingsMethods for detecting while drilling underbalanced the presence and depth of water produced from the formation and for measuring parameters related thereto
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    US-9804291-B2October 31, 2017Schlumberger Technology CorporationMethods and apparatus for determining fluid parameters
    WO-2006004740-A2January 12, 2006Baker Hughes IncorporatedBaker hughes incorporated
    WO-2006004740-A3June 01, 2006Baker Hughes Inc, David M Chase, Benoit J Guivarch, Stephen Riley, Darryl TrckAmeliorations relatives a la technique de determination de flux (« flowshot »)
    WO-2010031052-A2March 18, 2010Bp Corporation North America Inc., Bp Exploration Operating Company LimitedProcédé de détermination de conditions dans un trou de sonde à partir de données de mesures réparties
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