2.2.1 Pleasant Valley Water District Wells
Eleven wells were drilled in 1980 by the Pleasant Valley Water
District. The wells were drilled using the hydraulic rotary method and were gravel
packed. The wells ranged in depth from 943 to 1453 feet and were completed using wire
wrap type of screen. The total length of well screen installed in these wells varied
from 360 to 1060 feet.
The wells were developed using a jetting and air lift pumping
technique with average times of development ranging from 40 to 60 hours per well.
2.2.2 Other Wells Used for Comparison
To compare the effect of different well screen types and lengths on
the producing capabilities in the Pleasant Valley Basin, 23 other wells were chosen for
analysis. These "Comparison" wells, also drilled by the hydraulic rotary method, were
selected at random and represent a variety of screen types ranging from milled and
punched slotted casing to shutter screen. Total depth of these wells vary from 268
feet to 1338 feet with lengths of screens from 120 to 1076 feet.
These wells were primarily developed by bailing, with development
times averaging only four hours per well. The production results from these wells in
general exceeded results from the Water District wells completed using wire wrap screens
and developed using jetting and air lift pumping.
Figure 1 shows the location of the wells used
in the study and Figure 6 (Appendix) summarizes the
production properties. The Pleasant Valley Water District wells are numbered P-1
through P-11 and the comparison wells are numbered C-1 through C-24.
