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PERMEABILITY-POROSITY REIATIONSHIPS 127
I Depth matched core and log data Characterize the hydraulic units
4 0 Mineralogically
Stress sensitivity
Pore throat geometry
Convert ambient stress core data to insitu
stress Modified J-function
y = k. Ot . RQI
ki ’ k, ’ RQIi
Establish relationship between above variables and
where b is the stress sensitivity factor FZI
4
4 I Select environmentally corrected logging and tool I
remonses
From well log & core data compute
4
Rank-correlate logging tool responses
(GR, h-4b At, R,, h. etc.1
From J-function obtain KT with FZI using spearman’s RHO statistical
From NMR (if available): S,, technique
Q
Calculate HT = KTSvf and Hr =Kp
k
Compute statistical measures of dispersion (mean,
median, standard deviation) of all logging variables
and FZI
~~ ~ ~
Setup matrix solution in cored well per hydraulic
unit
where X,j = GR, h- h, At, R,
Figure 3.21. A generalizedflow chart for characterizing flow units using core and
well log data, modifled after Amaefule et al. [27J.
