Reducing effect of motion on nmr measurements

Abstract

Systems and methods of removing motion-induced noise from datasets from a NMR tool. The method includes steps of generating an echo train from each dataset and identifying one or more datasets that were collected while a motion of the tool was below a predetermined threshold as stationary datasets. Datasets not identified as stationary are identified as moving datasets. The method further performs steps of building a statistical model of the echo train, estimating a motion-induced noise component of the echo train using the statistical model and the stationary datasets, calculating a distortion of the echo train for each datasets using a physical model of the tool within the wellbore, estimating a true signal of each moving dataset based on the estimated motion-induced noise component and the respective calculated distortion, estimating a true signal of each stationary dataset based on the respective calculated distortion, and combining the estimated true signals of the moving datasets and the stationary datasets to produce a superset of clean NMR data.