Marine electromagnetic measurement system U Conti, E Nichols US Patent 6,842,006, 2005 | 96 | 2005 |
Electromagnetic induction method and apparatus for the measurement of the electrical resistivity of geologic formations surrounding boreholes cased with a conductive liner E Nichols US Patent 6,294,917, 2001 | 92 | 2001 |
Permanently emplaced electromagnetic system and method for measuring formation resistivity adjacent to and between wells E Nichols US Patent 6,534,986, 2003 | 86 | 2003 |
Method and apparatus for the measurement of the electrical resistivity of geologic formations employing modeling data M Wilt, E Nichols US Patent 6,393,363, 2002 | 75 | 2002 |
Electromagnetic casing inspection tool for corrosion evaluation TM Brill, JL Le Calvez, C Demichel, E Nichols, FZ Bermudez IPTC 2012: International Petroleum Technology Conference, cp-280-00197, 2012 | 66 | 2012 |
Subsurface conductivity imaging systems and methods E Nichols US Patent 7,023,213, 2006 | 60 | 2006 |
Signals and noise in measurements of low‐frequency geomagnetic fields EA Nichols, HF Morrison, J Clarke Journal of Geophysical Research: Solid Earth 93 (B11), 13743-13754, 1988 | 53 | 1988 |
Scanning for downhole corrosion IA Acuña, A Monsegue, TM Brill, H Graven, F Mulders, JL Le Calvez, ... Oilfield Review 22 (1), 42-50, 2010 | 37 | 2010 |
Electromagnetic logging between borehole and surface R Rosthal, E Nichols, J Lovell, C Bogath US Patent 8,638,103, 2014 | 34 | 2014 |
Surveying using vertical electromagnetic sources that are towed along with survey receivers DL Alumbaugh, A Zerilli, HF Morrison, M Howlid, JP Brady, L Combee, ... US Patent 8,008,921, 2011 | 34 | 2011 |
A fast and rigorous 2.5 D inversion algorithm for cross-well electromagnetic data A Abubakar, TM Habashy, D Alumbaugh, P Zhang, M Wiltn, H Denaclara, ... SEG International Exposition and Annual Meeting, SEG-2005-0534, 2005 | 34 | 2005 |
Determining correction factors representing effects of different portions of a lining structure B Clark, F Morrison, E Nichols, H Zhang, RA Rosthal US Patent 7,795,872, 2010 | 33 | 2010 |
Sensor for detecting the magnetic field in the area of downhole casing E Nichols, U Conti, D Omeragic US Patent 6,597,178, 2003 | 30 | 2003 |
Time synchronization in units at different locations E Nichols, Y Hosoda, T Johnsen, V Vytla, H Zhang, L DePavia US Patent 8,181,057, 2012 | 28 | 2012 |
Resistivity tool with selectable depths of investigation D Homan, E Nichols, M Wilt, J Seydoux US Patent 7,825,664, 2010 | 28 | 2010 |
Casing integrity mapping using top-casing electrodes and surface-based electromagnetic fields MJ Wilt, ES Um, E Nichols, CJ Weiss, G Nieuwenhuis, K MacLennan Geophysics 85 (1), E1-E13, 2020 | 25 | 2020 |
Electromagnetic sounding for hydrocarbons J Brady, T Campbell, A Fenwick, M Ganz, SK Sandberg, MPP Buonora, ... Oilfield Review 21 (1), 4-19, 2009 | 25 | 2009 |
Quantitative corrosion assessment with an EM casing inspection Tool TM Brill, JL Le Calvez, C Demichel, E Nichols, FZ Bermudez SPE Kingdom of Saudi Arabia Annual Technical Symposium and Exhibition, SPE …, 2011 | 24 | 2011 |
Electromagnetic assessment of multiple conductive tubulars E Nichols, JJ Kohring, R Vinit US Patent 10,324,218, 2019 | 23 | 2019 |
Subsurface conductivity imaging systems and methods E Nichols US Patent 7,928,732, 2011 | 23 | 2011 |