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Measurement of isotope ratios in complex matrices |
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Systems and methods for subsurface electromagnetic mapping |
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2015-04-21 |
| 8729903 |
Method for remote identification and characterization of hydrocarbon source rocks using seismic and electromagnetic geophysical data |
Quinn R. Passey, Kevin M. Bohacs, David R. Converse, Yaping Zhu |
2014-05-20 |
| 8436609 |
Method and apparatus for detection of a liquid under a surface |
Timothy J. Nedwed, Hans Thomann, Robert E. Sandstrom |
2013-05-07 |
| 8437961 |
Time lapse analysis with electromagnetic data |
James J. Carazzone, Dmitriy A. Pavlov |
2013-05-07 |
| 8165815 |
Method for electromagnetic air-wave suppression by active cancellation and shielding |
Scott C. Hornbostel, Warren S. Ross |
2012-04-24 |
| 8078439 |
Method of imaging subsurface formations using a virtual source array |
James J. Carazzone |
2011-12-13 |
| 8014988 |
Method for obtaining resistivity from controlled source electromagnetic data |
Leslie A. Wahrmund, Kenneth E. Green, Dmitriy A. Pavlov |
2011-09-06 |
| 7925443 |
Method for controlled source electromagnetic reconnaissance surveying |
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2011-04-12 |
| 7894989 |
Method for determining earth vertical electrical anisotropy in marine electromagnetic surveys |
Xinyou Lu, Olivier M. Burtz |
2011-02-22 |
| 7769572 |
Method of imaging subsurface formations using a virtual source array |
James J. Carazzone |
2010-08-03 |
| 7643942 |
Method for controlled source electromagnetic reconnaissance surveying |
Leslie A. Wahrmund, Dmitriy A. Pavlov |
2010-01-05 |
| 7539279 |
Logarithmic spectrum transmitter waveform for controlled-source electromagnetic surveying |
Xinyou Lu |
2009-05-26 |
| RE40321 |
Remote reservoir resistivity mapping |
— |
2008-05-20 |
| 7277806 |
Method for removing air wave effect from offshore frequency domain controlled-source electromagnetic data |
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2007-10-02 |
| RE39844 |
Remote reservoir resistivity mapping |
— |
2007-09-18 |
| 6603313 |
Remote reservoir resistivity mapping |
— |
2003-08-05 |
| 4617518 |
Method and apparatus for offshore electromagnetic sounding utilizing wavelength effects to determine optimum source and detector positions |
— |
1986-10-14 |
| 4404612 |
DC Solid state overload relay |
Ronald W. Hughes |
1983-09-13 |