(GP/GT) for Additional Water Supply in the Lower Rio Grande

Within Reservoir Area B, the sand averages 10,033 feet in depth,
with an average thickness of 517 feet. Net sand thickness averages
411 feet, or 78 per cent net sand. The pressure at the top of the
sand averages 7,493 psi, and the geopressure gradient is 0.745
psi/foot.
The average porosity is 15 percent and the average
permeability is 16 mn.
Average temperature at the top of the sand
is 264°F (A.A.P.G. corrected).
Porosity and permeability values
were estimated from. resisti vi ty and spontaneous potential log
values.
The average KH is 6106. These data are summarized in
Table 4.
The 10,000 foot sand was deposited in shallower water of the
prograding delta system than were the Marks and Bond sands of
Reservoir area C.
This massive sand appears to be a series of
reworked distributary-mouth bar sands and shoreface sandstones with
great lateral continuity within the area of Reservoir B (Fig. 6).
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