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Keywords: magnetic field
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Proceedings Papers

Paper presented at the SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition, October 12–14, 2021
Paper Number: SPE-205699-MS
... Where B passive is a magnitude of a static magnetic field from a monopole, µ r is the relative magnetic permeability of the medium, which is ∼1 in air and within most geological formations that concern this paper, and, therefore, it can typically be ignored. M (Wb) is a pole strength, r (m...
Proceedings Papers

Paper presented at the SPE Asia Pacific Oil & Gas Conference and Exhibition, November 17–19, 2020
Paper Number: SPE-202208-MS
... and eliminates wear of internal parts and pressure drops, the Halbach magnet structure is designed to provide a uniform magnetic field inside the bore while cancelling the magnetic field outside the housing of the device, the separate antenna structure is designed to eliminate flow effects on MR measurement...
Proceedings Papers

Paper presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, October 23–25, 2018
Paper Number: SPE-192033-MS
.... log analysis coal seam gas sensitivity adsorbed gas sequence well logging complex reservoir relaxation magnetic field coal bed methane Upstream Oil & Gas pulse sequence gas content desorption measurement coalbed methane diffusional relaxation magnetic resonance measurement...
Proceedings Papers

Paper presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, September 20–22, 2011
Paper Number: SPE-147859-MS
... cutters. The case study examples demonstrate the improved efficiency and reliability of determining stuck-pipe intervals and subsequent successful pipe recovery. drilling operation log response bottomhole assembly magnetic field determination wellbore integrity patent repeatability torque...
Proceedings Papers

Paper presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, October 18–20, 2010
Paper Number: SPE-133046-MS
... magnetic field thin section nucleus nile delta porosity Introduction Nuclear magnetic resonance (NMR) refers to the response of atomic nuclei to magnetic fields. Many nuclei have a net magnetic moment and angular momentum or spin. In the presence of an external magnetic field, an atomic nucleus...
Proceedings Papers

Paper presented at the SPE Asia Pacific Oil & Gas Conference and Exhibition, September 11–13, 2006
Paper Number: SPE-101096-MS
... to the electromagnetism theory, we know that around the electriferous coil there will be magnetic field and we can judge the orientation of magnetic field by the Right-hand Helix Rule. From the fig.1a we know the orientation of the electric current and the upside is the south pole of the magnetic field; the downside...
Proceedings Papers

Paper presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, October 8–10, 2002
Paper Number: SPE-77850-MS
... Abstract Sixty experiments have been conducted to study the effects of magnetic fields on calcium sulfate scale (also known as gypsum scale). For this purpose, three magnetic systems were designed using NdFeB (Neodymium Iron Boron) magnets of different geometry arranged in open and closed...

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