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EMF

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Proceedings Papers

Paper presented at the Offshore Mediterranean Conference and Exhibition, March 23–25, 2011
Paper Number: OMC-2011-025
... protection action value risk and uncertainty assessment exposure electromagnetic field human body risk assessment countermeasure risk management frequency exposure limit value basic restriction field strength classification 1 EMF RISK ASSESSMENT IN OIL & GAS INDUSTRY A. Soldi, P. Cerri, L. Di...
Journal Articles
J Can Pet Technol 24 (01).
Paper Number: PETSOC-85-01-02
Published: 01 January 1985
...R.G. McPherson; F.S. Stanton; F.E. Vermeulen This paper presents a conceptual description of a process (the Electromagnetic Flood process or simply EMF process) for inundating an oil sand formation with a guided electromagnetic wave to generate a heat front penetrating into the formation, thereby...
Images
Images
a-3D modeling the <b>EMF</b> signal for calculating the wall thickness of tubing w...
Published: 12 October 2021
Figure 3 a-3D modeling the EMF signal for calculating the wall thickness of tubing with a diameter of 89 mm. b-Determination of minimum detectable defect size in an 89 mm (3-1/2") pipe. More
Images
<b>EMF</b> decays of the scanning tool opposite a hole in the pipe versus simulate...
Published: 12 October 2021
Figure 4 EMF decays of the scanning tool opposite a hole in the pipe versus simulated decays. More
Proceedings Papers

Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-0633
..., which shows that the induced electromotive force (EMF) varies inversely to the topographic inequality while apparent resistivity changes conformably to the topographic inequality, at the point on sharp place the induced EMF and apparent resistivity vary sharply and at the point on smooth place they vary...
Proceedings Papers

Paper presented at the Offshore Technology Conference Asia, March 22–25, 2016
Paper Number: OTC-26597-MS
... waveform of equal strength but opposite direction and superimposing it to the existing waveform. The challenge of generating the proper cancelation waveform is overcome by a multistep learning algorithm. To sense the vibration, it uses the back-electromotive force (back-EMF); a voltage signal determined...
Proceedings Papers

Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-0899
... the instrument is able to deliver estimates of ground tilt. The ICM is basically a wire wound around a ferromagnetic core material. A variation in ambient magnetic induction oriented along the core results in an EMF being induced at the output wires. The ICM has been used with much success to observe small time...
Journal Articles
SPE Form Eval 3 (01): 17–23.
Paper Number: SPE-14190-PA
Published: 01 March 1988
... the problem to which an analytic solution is sought can be stated as follows. A coil carrying an alternating current is wound on an insulating mandrel centered coaxially in a borehole. A cylindrical conductor is placed inside the mandrel and concentric with it to find the electromotive force (EMF) induced...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12985
... an owner/operator responds to the threat. However, the measurements themselves do not affect the corrosion threat. Other aspects such as the power line Longitudinal Electric Field (LEF) or Electro-Magnetic Force (EMF) may also be used to “calibrate” the AC Interference computational model, especially...
Proceedings Papers

Paper presented at the SPWLA 5th Annual Logging Symposium, May 13–15, 1964
Paper Number: SPWLA-1964-A
... for the investigation were obtained with a resistor network analogue. Upstream Oil &amp; Gas EMF parameter value resistivity apparent resistivity well logging SP amplitude amplitude SSP invasion bed thickness variable parameter determination conventional emf normalized area log analysis Thickness...
Journal Articles
J Ship Res 61 (01): 23–34.
Paper Number: SNAME-JSR-2017-61-1-23
Published: 01 March 2017
...Hongfen Bai; Jingwei Zhu; Jungfeng Quin The fault-tolerant permanent magnet motor (FTPMM) drives are desired in electric ship propulsion systems. The winding inductance, the sinusoidal degree of the back electromotive force (back-EMF) waveform, and the total harmonic distortion (THD) of the cogging...
Proceedings Papers

Paper presented at the CORROSION 2003, March 16–20, 2003
Paper Number: NACE-03705
... or not to the transmission line(s) needs to be made. With the obtained values for the EMF, the induced voltages and currents are then calculated by solving the well-known transmission line model using a numerical technique that allows to specify the pipeline parameters (diameter, coating, soil resistivity, ?) for each...
Journal Articles
SPE J. 21 (06): 670–678.
Paper Number: SPE-9095-PA
Published: 01 December 1981
...J.H. Moran; C.M. Papaconstantinou A method is proposed for the laboratory determination of permeability; a water-saturated core is shaken and the electrokinetic electromotive forces (emf's) generated thereby are measured as an indication of water movement within the core. This method also can...
Proceedings Papers

Paper presented at the 43rd U.S. Rock Mechanics Symposium & 4th U.S. - Canada Rock Mechanics Symposium, June 28–July 1, 2009
Paper Number: ARMA-09-141
... in the process of rock deterioration. Two laser based sensing units were tested in this effort, namely, the unit using photo-induced electromotive force (PI-EMF) and the one using two-wave mixing (TWM) technique. In the initial experiments, TWM technique showed superior performance and technical maturity for AE...
Proceedings Papers

Paper presented at the SPE International Health, Safety & Environment Conference, April 2–4, 2006
Paper Number: SPE-98409-MS
... was presented. Write Librarian, SPE, P.O. Box 833836, Richardson, Texas 75083-3836 U.S.A., fax +1.972.952.9435. Abstract In this article, e-Med File (EMF) refers to a software that allows entering medical data (from petroleum industry employees) to make critical medical information available for further...
Proceedings Papers

Paper presented at the The Third International Offshore and Polar Engineering Conference, June 6–11, 1993
Paper Number: ISOPE-I-93-005
... that the concurrent presence of both electric and magnetic fields in an electrically conducting fluid generates the Lorentz force, which is a volumetric electromagnetic force (EMF) exerted on all water ions. This force is transmitted remotely, as opposed to the direct mechanical contact for the force transmitted...
Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16817
... February and August 2019, with one measurement per hour; 3) Data from powerline load monitoring devices installed at specific locations of the power lines. The data includes electromagnetic field (EMF), electric field and derived phasing and current load of the circuits, measured every 15 minutes during...
Journal Articles
J Pet Technol 39 (03): 345–352.
Paper Number: SPE-12675-PA
Published: 01 March 1987
... mapped at depth with the CSAMT technique to assist in determining the location of the steam front. The CSAMT equipment produces an induced EM field (EMF) in the earth from a transmitting antenna. The interaction of this EMF with subsurface formations, including the pay zone where the EOR processes...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition and Conference, November 3–6, 2008
Paper Number: SPE-118292-MS
... (EMFS) was developed, consisting of mechanical open hole packers, capable of withstanding high differential pressures at high operating temperatures, with specially designed fracturing ports (FracPorts) that are located between the packers. A series of these components are run simultaneously in the well...

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