The City of North Miami Beach, Florida is in the process of constructing a new reverse osmosis
water treatment facility and Floridan aquifer wellfield, and a new nanofiltration water treatment
facility and an expanded Biscayne aquifer wellfield to meet future water demands. The two deep
Floridan aquifer wells recently constructed, wells 3F and 4F, had specific capacities of 14 gpm/ft
at 1,200 gpm and 11 gpm/ft at 1,800 gpm, respectively. Well 3F had 2,500 gallons of acid
(18/20 Baume HCl) injected into the borehole during acidization, which effectively increased the
specific capacity of the well to 47 gpm/ft at 3,200 gpm after development. Well 4F had 5,000
gallons of acid injected during acidization, which effectively increased the specific capacity of
the well to 80 gpm/ft at 3,250 gpm after development. Acidization of wells 3F and 4F increased
their specific capacities by greater than 330% and 720%, respectively. The annual energy cost
savings from acidization will be about $18,000 for well 3F and $28,000 for well 4F.
One of the five shallow Biscayne aquifer wells recently constructed, had significantly lower
specific capacity than the other four wells. Before acidization the well had a specific capacity of
66 gpm/ft at 2,400 gpm. After the addition of 1,000 gallons of acid, the well's specific capacity
had increased to 1,787 gpm/ft at 2,360 gpm after development, a 2700% increase. The
annual energy cost savings from acidization for this well will be about $14,940. The annual
energy cost savings should be compared to the total cost of performing the acidization on the
wells to determine how long it will take to pay for the additional work. The energy cost savings
will pay for the additional work performed on these wells in less than two years for all three
wells. Acidization of wells should be considered an option to improve productivity and to
decrease operating costs for any well completed in a carbonate aquifer or a semi-consolidated
aquifer with calcium carbonate cement. Includes 10 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 820 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 10 |
| Published : | 06/17/2005 |
