SH would not permit me to post the tabular data of the 6 zones tested in L53-D2 well which production tested at over 1000 BPD from the deepest sandstone ( I recall API of 27 deg ).
The upper 5 sandstones were subsequently tested and the results can be seen here...........
You will note that the upper 5 zones were quite productive, with water cuts somewhat variable at the end of the zonal testing.
Shallower depths tended to be less productive consistent with higher viscosity.
In general, produced oil seems to have a trend of becoming heavier, inverse to depth, and certainly in the most shallowest zones.
I guess what I was trying to illustrate with this table is that the upper 5 sandstones should not be written off as unproductive or exclusively heavier oil , and, given the vissitudes of oil migrations and stratigraphic variables, highly productive zones of decently light oil could still make this well a very productive one.