Page 223 - A Practical Companion to Reservoir Stimulation

PRACTICAL COMPANION TO RESERVOIR STIMULATION

becoming a larger concern as environmental issues become throughout the industry. These units are spotted directly over
more prominent. the blender hopper and gravity feed the proppant at a con-
It is important to be able to quickly determine the volume trolled rate through a chute. Care should be taken to ensure
of fluid in a frac tank. The fluid volume may be determined that the hydraulic lift mechanism is in good working order,
by using strap charts that display a volume in accordance to a allowing the dump to be completely raised. If the dump is not
measured level of fluid. Strap charts for the standard types of completely raised, the proppant delivery rate may not be
frac tanks currently in use are shown in Tables P-13 through sufficient, especially as the dump nears empty. This can be
P-16. very critical at high proppant concentrations where the deliv-
ery rate needs to be the highest. To prevent problems with the
P-7.3: Proppant Storage and Delivery proppant delivery rate, it is a good idea to bring out extra
The total volume of proppant, the rate of proppant delivery proppant if capacities allow. Bobtailed units will generally
and the number of different proppants to be used in the haul between 250 ft' and 450 ft' of proppant, and trailer units
treatment must be considered when choosing the proper will haul up to 600 ft3. The maximum delivery rate of these
vessel for storing proppant on location. Small treatments may units depends on the chute size and placement but is gener-
only require dump trucks to deliver the proppant to the ally between 3000 lb/min and 7000 lb/min of proppant.
blender. Bobtail dumps and trailer dumps are routinely used Moving proppant dumps during a treatment should be

Inside Diameter Zapacity Inside Diameter Capacity Inside Diameter Capacity Inside Diameter Capacity
per ft per ft per ft per ft
(ft) (in) Df Depth (ft) (in) Df Depth (ft) (in) of Depth (ft) (in) of Depth
(bbl) (bbl) (bbl) (bbl)
2 0 0.560 4 0 2.238 8 0 8.952 14 0 27.41 8
1 0.607 1 2.332 3 9.521 3 28.405
2 0.657 2 2.429 6 10.107 6 29.41 1
3 0.708 3 2.527 9 10.71 0 9 20.434
4 0.762 4 2.627 9 0 11.331 15 0 31.474
5 0.817 5 2.729 3 11.969 4% 33.151
6 0.874 6 2.822 6 12.625 6 33.607
7 0.934 7 2.939 9 13.298 16
8 0.995 8 3.046 0 35.81 1
9 1.058 9 3.156 10 0 13.989 6 38.084
10 1.123 10 3.268 3 14.697 17 0 40.427
11 1.190 11 3.382 6 15.422 6 42.840
9 16.166
3 0 1.259 5 0 3.497 18 0 45.323
1 1.330 3 3.856 11 0 16.926 6 47.875
2 1.403 6 4.232 3 17.704 0 50.499
3 1.478 9 4.625 6 18.500 l9 6 53.1 91
4 1.554 6 0 5.036 9 19.320
5 1.633 3 5.464 12 0 20 55.954
O
6 1.714 6 5.900 3 20.991 6 I 58.787
7 1.807 9 6.374 6 21.857 21 61.690
8 1.881 9 22.740 64.91 6
9 1.967 7 0 6.854 13 0 23.641 22 0 67.705
10 2.056 3 7.353 3 24.559
11 2.146 6 7.869
9 8.402 6 25.494
9 26.447

Table P-13-Capacity of vertical cylindrical tanks.

P-62