| Meeting Time/Place |
The New Orleans Chapter holds its meetings on the third Thursday of the month at 11:30 am, from September through May.
We meet at the Downtown-Superdome Holiday Inn, 330 Loyola.
Members and Non-Members: $30.00
The date has been set for our 2009 SWPLA Golf Tournament!
Friday, September 11, 2009 - Audubon Park Golf Course
May Luncheon topic:
May 21, 2009
Abstract
ANALYSIS OF DENSITY IMAGE DIP ANGLE CALCULATIONS
Kevin McKinny, Paul Boonen, and Cornelis Huiszoon, PathFinder Energy Services, Inc
Logging While Drilling (LWD) density images have been shown to be useful in determining the relative dip angle of beds intersecting the borehole.
In a typical calculation, the dip angle alpha is given by the equation alpha = atan((AB)/( D+2DeltaR)), where A and B are the peak and trough, respectively, of a sinusoidal fit to the image of the bed boundary, D is the borehole (or tool) size, and DeltaR is the depth of investigation of the tool. Traditionally, DeltaR is considered constant for a given tool geometry; however, for an LWD density tool, DeltaR is a function of the formation density, mud weight and tool standoff, while the accuracy of the values assigned to A and B are related to such factors as logging speed and the depth resolution of the density measurement.
In this study, we present an in-depth analysis of the computation of relative dip angle from density images based on numerical simulation as well as laboratory tests and field data. It includes the computation of DeltaR and the effects of the borehole environment on DeltaR. The effect of errors in the values of A and B in the dip angle equation are also investigated. We discuss the accuracy of the calculated dip angle as a function of the dip angle and demonstrate that accurate (relative) dip angles can be obtained with an LWD density tool.
About the Speaker
Kevin S. McKinny obtained his Ph.D. in Experimental High-Energy Particle Physics from the University of Alabama in 2003. From 2003 to 2006, he worked in the development of neutron-gamma techniques for bomb detection. Since June of 2006, he has been involved in development of natural gamma and density tools, as well as imaging algorithms, with PathFinder Energy Services, Inc.
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For Meeting Information contact:
Leeann Daniels, Baker
504.561.7934
email: leeann.poulin at bakeratlas.com
| President | Dave Reiter | dreiter at enipetroleum.com | |
| President-Elect | Leeann Daniels | leeann.poulin at bakeratlas.com | |
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