PETE 3036 : Well Logging Review Midterm
Document Summary
Thickness of bed: shale or sandstone bed. 3. determining clay content: correlate with different logging tools, correlate of sedimentary units b/w wells, spectral gamma ray can tell specific minerals, bulk density, porosity, shale content, sw, mineralogy, seismic calibration, shear and bulk modulus. Uranium (u) most common radioactive elements that emit rays) Bombards formation with gamma rays and then has detectors to retrieve those that come back. 9-10 inches: can run centered or eccentered, can run through open hole or casing, limestone and anyhydrites have lowest reading (15-20 apiu, dolomites and clean sands (20-30 apiu, shales (75-120 apiu) Neutron log 1. porosity: gas detection by comparing neutron porosity with density porosity, salinity, mineralogy, reservoir saturation, reservoir monitoring. Disadvantage: influenced by absorption of neutrons which depends on salinity: epithermal neutron detectors- limits the. 1. finding shale index: finding shale volume, thomas- Steiber plot: mineral identification from natural gamma ray spectrometry log.
