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Dive into the research topics where Cengiz Esmersoy is active.

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Featured researches published by Cengiz Esmersoy.


Seg Technical Program Expanded Abstracts | 1994

Dipole shear anisotropy logging

Cengiz Esmersoy

Parametric inversion is used to advantage in a technique and apparatus for borehole logging to determine properties of anisotropic formations, and a dispersion function that varies with frequency is used in the modeling of the formations. An embodiment of the method includes the following steps: providing a logging device that is moveable through the borehole; exciting a sonic source at a transmitter location on the logging device to establish flexural waves in the surrounding formations; measuring at each of a plurality of receiver locations on the logging device, which are spaced at a respective plurality of distances from the transmitter location, orthogonal wave components of split flexural waves that have travelled through the formations; computing, for each of the plurality of distances and for multiple frequencies, model orthogonal wave components which would result from the superposition of model split-flexural waves having selected wave parameters including respective fast and slow model slownesses which are variable functions of frequency and model polarizations; determining an error value which depends on the differences, at each of the plurality of receiver locations, between measured wave components and the model composite waves; modifying the model parameters; iteratively repeating the computing, determining, and modifying steps to reduce the error; and storing the ultimately modified model parameters as being indicative of properties of the formations.


Archive | 1999

Apparatus and method for determining a drilling mode to optimize formation evaluation measurements

Steven F. Crary; Ralf Heidler; Cengiz Esmersoy; Martin E. Poitzsch


Archive | 2000

Method and apparatus for communication with a downhole tool

William Underhill; Cengiz Esmersoy; Brian Clark; Jean-Michel Hache


Archive | 2000

Method for calculating a distance between a well logging instrument and a formation boundary by inversion processing measurements from the logging instrument

Dzevat Omeragic; Tarek M. Habashy; Cengiz Esmersoy


Archive | 2007

Multi-physics inversion processing to predict pore pressure ahead of the drill bit

Cengiz Esmersoy


Archive | 1991

Method and apparatus for determining properties of anisotropicelastic media

Cengiz Esmersoy


Archive | 2002

Electromagnetic resistivity logging instrument with transverse magnetic dipole component antennas providing axially extended response

Dzevat Omeragic; Cengiz Esmersoy


Archive | 2002

System and method for determining downhole clock drift

Anthony Collins; Andrew Hawthorn; Cengiz Esmersoy


Archive | 2001

Structures and methods for damping tool waves particularly for acoustic logging tools

Chaur-Jian Hsu; Jahir Pabon; Richard D. Joyce; Ralph M. D'Angelo; Jeffrey B. Aron; Pierre Campanac; Lennox Reid; H. Charles Straub; Cengiz Esmersoy; Darryl Grigor


Archive | 1987

Method for evaluating parameters related to the elastic properties of subsurface earth formations

Cengiz Esmersoy

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