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Chapter 3

least-square fit of the experimental data for R, using dgv, σ, Dcp and к as fitting
parameters. Detailed procedure is as follows:

1) Estimating initial values of geometric volume-based mean diameter dgv
and geometric standard deviation σ; signal attenuation fraction
κ0i, ∕<emu
and κwate∙; diffusivity of continuous oil phase Dcp.

2) Using Eq. [3.9] with Dcp and Dwaier to calculate attenuation R0i and Rwate∙;
using Eqs. [3.12], [3.16] and [3.17] to calculate attenuation Remu
; using Eq.
[3.23] to calculate total attenuation of the emulsion
R.

3) Performing least-square fitting of the experimental data Rexp for R until
norm of the difference
∣∣Re×p-^ll is smaller than tolerance to get fitted
values of all the parameters in step 1 ).

If combined with NMR CPMG T2 distribution measurement, drop size
distribution and surface relaxivity of water in diluted bitumen
p can be obtained [5].
In this case, fitting parameters are surface relaxivity
p and phase signal
attenuation fraction
κ. Remui is calculated by drop size distribution, which is
obtained from
T2 distribution and surface relaxivity. Total signal attenuation of the
emulsion
R is the weighted combination of phase signal attenuation with
attenuation fraction
κ. Detailed procedure is as follows:

1) Getting T2 distribution of water drops via CPMG measurement; estimating

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