Nuclear SIG


The report on US Department of Energy's scoping study on alternatives to radioactive logging tools, LLNL-TR-679101, has been released.
It can be found on the following link.

SPWLA Nuclear Logging SIG: An Introduction

Objective:  The purpose of the Nuclear Logging SIG is to be a focal point to advance the science, technology and application of nuclear measurements utilized for subsurface characterization and monitoring. See the Nuclear SIG By-laws document for details.

A Brief History: The Nuclear Logging SIG was established in 2000 by a group of oil industry nuclear experts led by a Coordination Committee, under the Log Characterization Consortium (LCC).  In 2012, like all SIGS, it was brought under the umbrella of the SPWLA as a Chapter-at-Large with its own By-Laws and Executive Committee, after the LCC was disbanded.  

Activities: Over the years, the Nuclear Logging SIG dealt with the following areas:

  • Carbon/Oxygen (C/O) logging tools and their interpretation challenges in Complex geometries and compositions
  • Early interpretation challenges for Nuclear Logging-while-drilling (LWD) measurements.
  • Development of a technical position on alternatives to chemical radiative sources used in well logging
  • Input by individual SIG members on radioactive source challenges to the National Academy of Science panel asked by US Congress for a report on industrial sources and their replacement (2007) and an Interagency Task Force (2010)
  • Written input to a Congressional Subcommittee, on potential effect of a reduction in the He3 inventory worldwide; He3 is used in neutron detectors.
  • Input on future of API Test Pits on University of Houston Campus
  • Prepared drafts  on density/PE and Neutron Standards -under review
  • A Catalog of nuclear Logging tools is being prepared

Nuclear Logging SIG is federal tax exempt under Section 501 (c) (6) .

Technical Documents (to view click on document below)

       1.   Units, Nomenclature, and Environmental Corrections for Pe and Density Measurements


Questions: Please contact

R. J. Radtke, Schlumberger (; +1 281 285 8402 office, +1 281 546 4710 cell)

Ahmed Badruzzaman (; +1 510 889 9427 office)

Executive committee:

Chairman: Ahmed Badruzzaman, Pacific Consultants and Engineers and U C Berkeley

Vice-Chairman of Technology: R. J., Radtke, Schlumberger

Secretary Dale Fitz: ExxonMobil

Treasurer: Cornelius Huiszoon: Schlumberger Pathfinder

SIG Webmaster: Weijun Guo

Executive Members:

Feyzi Inanc: Baker Hughes

Gordon Moake: Halliburton

Anton Nikitin: Shell

Richard Pemper: Weatherford

Adrian Zett: BP


By Laws (click on By Laws)


Nuclear SIG Meeting NOTES: Click on  links below

Minutes 6-16-19
(Adobe PDF File)
Minutes 10-29-18
(Adobe PDF File)
Meeting 10-29-2018
(Adobe PDF File)
Meeting 10-09-2014
(Adobe PDF File)
Minutes 10/12/2016
(Adobe PDF File)