... sand well logging composition athabasca bitumen bitumen log analysis water mass prediction water parameter spectra montmorillonite kaolinite prediction upstream oil & gas mass prediction synthetic sample accuracy complex reservoir nmr spectra spectrum brine illite relaxation...

.... The cations used are Na + , Ca 2+ and Mg 2+ , which are readily found in formation brines. NMR spectra of clays exposed to brines tend to show distinct characteristics of both amplitude and mean relaxation. Analysis of the NMR spectra correlates the NMR response to clay-chemistry of the individual clays...

... in NMR spectra, particle size analysis has also been incorporated. The study between particle size distribution and NMR spectra for oil sands is still in very initial stage. spectrometer water content correlation upstream oil & gas log analysis relaxation time average error nmr spectra...

... is studied. This is done by mixing sand and Cold Lake bitumen and exposing it to a liquid solvent. As the solvent comes into contact with the bitumen-sand matrix, it gradually diffuses into the liquid-filled pores and dilutes the bitumen. NMR spectra are continuously acquired for the duration of each...

... of the oils and NMR spectra were obtained. The mixture of solvent and heavy oil or bitumen produces a spectrum that is distinctly different than that of the solvent or oil alone. From the shape and amplitude of the NMR spectra we can calculate the amount of solvent prevent. Furthermore, we can predict...

... at relaxation times less than 10 ms at room temperature. In clay free sands the contribution of heavy oil to the NMR spectrum is distinct and, as a result, it is still possible to calculate oil and water content based on NMR spectra. However, in sands that contain clays, the relaxation times of clay bound water...

.... Water uptake appears to be spontaneous in water-wet samples and much slower in water-repellent samples, however all samples will eventually reach the same equilibrium endpoint regardless of wettability. NMR spectra also show that the results from water in uncoated and coated sands closely resemble...