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

111-37
Three different forms of GP/GT energy are available from the resources described above, specifically,
the following:
1. Thermal energy available from the heat content of the hot brine, hereinafter referred to
as E...!lU
2. Thermal energy available from the heat content of the entrained natural gas, hereinafter
referred to as~, and
3. Hydraulic energy available from the wellhead pressure, hereinafter referred to as E(P).
Order of magnitude projections of the quantities of the GP/GT energy available from these three forms,
based on three wells, one drilled into each of the three sands presented above, and expressed in terms
of ranges of British Thermal Units per hour (BTUs per hour), Horsepower, (HP) and Kilowatts (KW),
are presented as follows:
Order of Magnitude Projected OUantity Ranges(l)
BTU'lilHr x 10' HQ[S!a!QwCr KilQwllW
Energy East Bond Marks East Bond Marks East Bond Marks
Form Sand Sand Sand Sand Sand Sand Sand Sand Sand
E(B) 36,488 34,298- 20,615- 14,325 13,466- 8,094- 10,691 10,050- 6,038
36,342 21,528 14,268 8,452 10,648 6,305
E(G) 10,104 9,261- 4,630- 3,968 3,637- 1,819- 2,960 2,713- 1,438-
10,104 5,051 3,968 1,985 2,960 1,480
E(P) 825 694 417- 306- 184- 272 228- m.
735 435 364 324 192 242 143
The quantity ranges presented above are applicable to the situation wherein only one GP/GT well is
completed in each of the three producing sand zones. The impact of multiple-well completions, in each
of the sand zones, on the range in values of the various parameters is illustrated in Figures 10-15 of Part
B of Section I, and several charts illustrating the IS-year cumulative production for each sand zone are
enclosed as Figures 16-21. In general, it can be stated that, while the aggregate quantity values of the
various parameters significantly increase with the number of wells, the unit productivity of any given well
declines significantly over time. Moveover, very detailed benefit/cost analyses would be required to
determine the optimal number and spacing of wells, the comparative advantages and disadvantages of
centralized versus decentralized desalination plants, etc. Because the preparation of such analyses is
beyond the scope of this present study, all further discussion and data will be focussed on the quantity
values of the various parameters associated with a single GP/GT well.
Notes: (1) Please refer to Appendix E for Support Calculations.