Log Data Acquisition and Quality Control

algorithm annual logging symposium assumed barite borehole cable calibration caliper characteristics computed core corresponds counting rates Courtesy of Schlumberger Courtesy of SPWLA curves data frames density logs density tool depth matching depth of investigation derived detection detector diameter downhole drilling effect environment environmental corrections example filtering filtrate formation evaluation ft/h function g/cm³ geometrical factor Halliburton Logging Services hole induction tool input invasion laterolog Log quality control logging company logging data logging speed logging tool logging while drilling long-spacing Mathematical modeling measurement mmho/m mudcake natural gamma ray nuclear tools oil-base mud parameters performed petrophysical photoelectric effect POROSITY p.u. pressure pseudo-geometric factor random error readings repeat reservoir sampling rate saturation Section sensors short-spacing signal sonde error sonic standard deviation standoff surface systematic error Table tape temperature thermal neutron thermal neutron porosity tool response Trans uncertainty vertical resolution volume wellsite zone