Electricity: measuring and testing – Particle precession resonance – Using well logging device
Patent
1997-01-15
1998-08-18
O'Shea, Sandra L.
Electricity: measuring and testing
Particle precession resonance
Using well logging device
G01V 332
Patent
active
057962529
ABSTRACT:
A nuclear magnetic resonance (NMR) logging technique reveals the volume of hydrocarbons in an earth formation. The differences in viscosity among gas, oil and water are used to distinguish among these three fluids. During NMR logging, a parameter of a sequence of magnetic field pulses is altered, causing echo signal strengths to vary due to the diffusion of the fluids in the formation. The volume of hydrocarbons in the formation is determined from detected spin echo strengths. The invention applies to wireline NMR logging and NMR logging-while-drilling techniques.
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Kleinberg Robert L.
Latour Lawrence L.
Sezginer Abdurrahman
Jeffery Brigitte L.
O'Shea Sandra L.
Phillips Roger
Schlumberger Technology Corporation
Smith Keith G. W.
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