Schlumberger Technology Corporation

Services Petroliers Schlumberger

Geoquest Systems B.v.

Saad Kisra

Henri-Pierre Valero

Ram Sunder Kalyanraman

Vincenzo De Gennaro

Bassem Khadhraoui

Francisco Jose Gomez

John Adam Donald

Adrian Rodriguez Herrera

James Minton

Hiroaki Yamamoto

Assef Mohamad Hussein

Karsten Fischer

Lu Duc Duong Lam

Erik Wielemaker

Ridvan Akkurt

Methods and systems for determining a property of a tubular are described. Measurement data of cross-sectional shapes of the tubular at a plurality of depth positions is provided. A three-dimensional mesh representing the tubular based on the cross-sectional shapes is generated. A stress simulation using the three-dimensional mesh to provide an integrity assessment of the tubular is performed.

Methods and systems for determining integrity and operational boundaries of subterranean wells

A method for estimating sonic slowness comprising: obtaining () a plurality of sonic waveforms are received by a plurality of receivers of a logging tool after emission of a source sonic wave by a transmitter, obtaining () slowness models of the subterranean formation, a slowness model being defined by a at least one cell of constant slowness for at least one wave energy mode, computing (), for each slowness model, a set of candidate travel times, a candidate travel time of a set of candidate travel times being computed for a wave energy mode and a position of a receiver of the plurality of receivers, computing () a relevance indicator for each set of candidate travel times based on the recorded sonic waveforms; searching () a match between the sets of candidate travel times and the recorded sonic waveforms by searching a relevance indicator which is optimum, computing () a sonic slowness estimate for the subterranean formation from a set of candidate travel times for which the relevance indicator is optimum.

Method and device for estimating sonic slowness in a subterranean formation

A method, apparatus, and program product estimate anisotropic properties of an anisotropic formation based at least in part on determinations of a deviation of a wellbore associated with the anisotropic formation and an availability of non-sonic measurement data associated with the anisotropic formation. The determinations are used in the selection of at least one computer-implemented model that in turn may be applied to determine one or more unknown elastic constants for an elastic stiffness matrix.

Workflow for determining stresses and/or mechanical properties in anisotropic formations

The present invention is directed to methods and systems for taking measurements relating to subterranean formations. The methods and systems effectively compress data and thus facilitate more efficient data transmission. The methods and systems are capable of automatically varying data compression rates during a measurement operation. The variable data compression capability facilitates reliable collection of measurement data at faster and/or constant logging speeds. The data compression methods and systems may be applied to any measurement operation relating to subterranean formations, including, but not limited to: acoustic wireline logging measurements, acoustic logging-while-drilling measurements, electromagnetic measurements, nuclear magnetic resonance measurements, and resistivity measurements.

Data compression methods and systems

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Abingdon, United Kingdom

Saad Kisra