title: A Monte Carlo modeling alternative for the API Gamma Ray Calibration Facility.
abstract: The gamma ray pit at the API Calibration Facility, located on the University of Houston campus, defines the API unit for natural gamma ray logs used throughout the petroleum logging industry. Future use of the facility is uncertain. An alternative method is proposed to preserve the gamma ray API unit definition as an industry standard by using Monte Carlo modeling to obtain accurate counting rate-to-API unit conversion factors for gross-counting and spectral gamma ray tool designs.
authors.affiliation: Halliburton Energy Services, 3000 North Sam Houston Parkway East, Houston, TX 77032-3219, USA. Electronic address: Jim.Galford@Halliburton.com.
authors.forename: J E
authors.initials: JE
authors.lastname: Galford
keywords: API Calibration Facility; API unit; MCNP; Monte Carlo; Natural radioactivity