Hewitt Oil Field : 219 
The next sand of any importance and regularity lies about 150 to 
200 feet below the top or main sand of the Hewitt Sand Zone. This 
third sand in nearly all cases increases the production of wells when 
penetrated. This increase in production is from 25 to 200 barrels per 
day. 
A fourth sand occurs about 275 to 325 feet below the top or main 
sand, which also increases production considerably in the wells which 
have penetrated it. This sand probably increases production around 
100 to 200 barrels per day. 
Another sand is found at about 400 feet below the top sand which 
increases production about 200 to 300 barrels. This sand may be called 
the fifth oil sand of the Hewitt Sand Zone. 
The sixth oil sand probably will prove to be one of the most prolific 
sands of the zone and is found at about 600 to 650 feet below the 
top sand of the Hewitt Sand Zone. This sand has produced as much 
as 400 barrels per day in some of the few wells drilled to it. 
The deepest producing sand stratigraphically in the Hewitt field 
is the seventh sand of the Hewitt Sand Zone and is found about 700 
feet below the top or main sand. This sand will probably increase the 
production in the wells which have penetrated it 100 to 200 barrels. 
Further exploiting of the sixth and seventh sands may prove them 
to be the most prolific sands of the Hewitt field. 
There is no data available with which to predict whether there are 
deeper sands in the Hewitt field than this seventh sand. If there are 
deeper sands we are not able to predict whether they will carry oil 
or water. 
No sands in the Hewitt Sand Zone have been found which carry 
water in the field and this factor will make it easy to produce from all 
sands without endangering the upper sands by permitting water to 
enter the sands. It will be a very easy matter to deepen the wells and 
produce from two or more sands in the same well. 
Water Conditions in the Hewitt Field. 
There are three sources of water with which the oil man has to 
contend, namely: (1) upper water, (2) edge water or water in the 
base of the sand and, (3) bottom water or water in a separate sand 
below the oil sand. 
To date the first or upper water is the only source of water with 
which the Hewitt operator will have to deal. This upper water is 
easily taken care of by casing off the water before the oil sand is 
penetrated. 
At the present writing there are only three or four wells in the 
Hewitt field making water along with the oil and these are known to 
be due to casing leak, that is, the casing failed to shut off the water or 
a leak has developed in the casing from some cause and permitted this 
upper water to enter the well. 
Eventually edge water will make its appearance in the field and 
will have to be taken care of. This will first make its appearance in 
the wells along the edge of the field and migrate in on the field as 
the sands are drained of their oil. 
