| 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
SPWLA New Orleans Monthly Luncheon Meeting
Thursday, March 18
“A Comprehensive Investigation of Source Effects on Neutron Porosity Response for Logging-While-Drilling Measurements”
By Dr. Libai Xu, Smith-Pathfinder
RSVP Lisa at rxdx1117@yahoo.com
ABSTRACT
Americium-Beryllium (Am-Be) neutron sources have been used in neutron porosity logging for over 40 years. However, they now have become considerably more expensive and difficult to obtain. In addition, a recent report by the National Academy of Sciences recommended further study towards the possible replacement of Am- Be sources with either Californium-252 (Cf-252) neutron sources or neutron generators.
Because of the increased interest in alternative neutron sources, a detailed investigation was made between Am-Be, Cf-252 and Deuterium-Tritium (DT) neutron sources and variations in their neutron porosity response for logging-while-drilling (LWD) measurements. Monte Carlo simulations were used to investigate differences in thermal neutron porosity response due to source energy, as well as source to detector spacing, collar size, borehole plus environmental effects, and several clay minerals. Laboratory experiments were performed and a test well was logged with two identical LWD tools run together – the upper tool contained Cf- 252 and the lower had Am-Be.
The resulting neutron logs were in good agreement. Thus, with proper tool characterizations, Cf-252 and Am-Be sources yield similar neutron porosity logs.
BIO
Libai Xu is a Nuclear Physicist at SMITHPathFinder in Houston, TX. He received his Ph.D. in nuclear engineering in 2006 from the North Carolina State University. Before joining PathFinder, he worked at NCSU for one year as a postdoc. His present research focuses on LWD nuclear logging tool design and characterization and Monte Carlo modeling. He is a member of SPWLA, ANS and Sigma Xi.
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For Meeting Information contact:
William Horvath (Shell)
504.728-0434
email: william.horvath at shell.com
| President | Leeann Daniels | leeann.poulin at bakeratlas.com |
| President-Elect | William Horvath | william.horvath at shell.com |
| VP - Membership | Richard Mongan | richard.mongan at chevron.com |
| VP - Public Relations | Russell Willis | russell.willis at enipetroleum.com |
| Treasurer | David Gillis | gillis1 at new-orleans.oilfield.slb.com |
| Secretary | Lisa Meeks | rxdx1117 at yahoo.com |
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| Chapter Webmaster | Glenn Donovan | Glenn.Donovan at shell.com |
| Past President | Dave Reiter | dreiter at enipetroleum.com |