Accounting for tool based effects in nuclear magnetic resonance logging data
AssigneeHalliburton Energy Services, Inc.
InventorsLilong Li, Songhua Chen, Mark Cheiron Butler
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AssigneeHalliburton Energy Services, Inc.
InventorsLilong Li, Songhua Chen, Mark Cheiron Butler
Estimating the term…
An electromagnet model or models are created to generate the static and radio frequency magnetic fields of an NMR downhole logging tool. The magnetic field distributions are then used in spin dynamics (SD) simulations to model the impacts of various effects on NMR logging data, effects that cannot be accurately describe by theoretical formulation alone. The accuracy of the electromagnetic model and the SD simulation may be verified against experimental observations or trial logging runs. Simulation of electronic circuit, molecular diffusion, tool motion can all be incorporated in the SD simulation. The NMR data inversion process can be modified according to echoes obtained from SD simulation to obtain more accurate petrophysical parameters.
A method comprising:
One or more non-transitory machine-readable media comprising program code for determining a set of one or more modifiers for nuclear magnetic resonance (NMR) logging data, the program code comprising instructions to:
An apparatus comprising:
Dependencies are inferred from the claim text.