electricity production – west texas · have geothermal power potential from deeper oil and gas...
TRANSCRIPT
1
– Electricity Production –West Texas
A Presentation To The:New Mexico Geothermal Energy Working Group
Tuesday, May 13, 2008 Santa Fe, NM
Dr. Richard J. Erdlac, Jr.Energy America, Inc.Energy America Geothermal, LLCMidland, Texas
An Example For New Mexico
2
Energy America Inc.Energy America Geothermal, LLC
Trading & Supply
GEOEXCHANGEPOWER
3
Presentation Overview1) New Mexico sits astride a highnear surface heat flow trend thatstretches from Colorado south tothe Mexican border. 2) New Mexico is part of a broad
trend of states with deeper oiland gas wells that extends fromthe Gulf Coast NNW to Montana.
3) West Texas Permian Basingeothermal investigations suggestthat parts of New Mexico may alsohave geothermal power potentialfrom deeper oil and gas wells.
4) Trans-Pecos region of WestTexas has promise of geothermalpower as part of the Rio GrandeRift, stretching from the Big Bendof Texas through New Mexico andinto Colorado.5) Geothermal energy may have
the highest capacity factor of allthe renewable energy resourcesavailable for power generation.
4
Existing geothermal power generation has focused on western states where high heat flow exists
at or near the Earth’s surface.
Geothermal For Electrical Production
5
Subsurface BHT Data – AAPG / USGS
New opportunity exists through the many oil and gas wells that have been drilled in the deeper sedimentary
basins that have encountered hot temperatures.
6
New opportunity exists through the many oil and gas wells that have been drilled in the deeper sedimentary
basins that have encountered hot temperatures.
Subsurface BHT Data – AAPG / USGS
7
Subsurface BHT Data – AAPG / USGS
Delaware & Val Verde Basins
Blue = 151 to 178oF (66 to 81oC)Green = 179 to 288oF (82 to 142oC)Red = > 289oF (> 143oC)Dark Gray Area = 302oF (150oC) Isotherm
8
Subsurface BHT Data – Gulf Oil – 1982
9
GDS Well Data Base
GDS – 321,000 Wells & Locations May 2004
GDS – 44,525 Wells & Locations May 2004
0 to 4,999 Feet33,481 Wells & Locations
12,000 to 30,000 Feet2,242 Wells & Locations
5,000 to 11,999 Feet8,802 Wells & Locations
10
Delaware – Val Verde Basin BHT Data
RS2RD
2
Maximized
RS2RD
2 Maximized
11
Delaware – Val Verde Basin BHT Data
12
Delaware – Val Verde Basin BHT Data
13
Delaware – Val Verde Basin BHT DataAt 200oC :
Pecos dT/dZ = 58.8oC
At 200oC : Gomez dT/dZ = 49.8oC
At 200oC : Puckett dT/dZ = 75.0oC
At 200oC : Grey Ranch dT/dZ = 50.0oC
14
Impact On New MexicoSan Juan Basin
Blue = 151 to 178oF (66 to 81oC)Green = 179 to 288oF (82 to 142oC)Red = > 289oF (> 143oC)
Permian Basin
15
Trans Pecos, Texas – Rio Grande Rift
Heat Flux
16
Trans Pecos, Texas – Rio Grande Rift
17
Trans Pecos, Texas – Rio Grande Rift
2.753oC/100m
Below threshold jump.
The points defining well gradients were plotted as t-d values (right), with purple and blue values combined representing all of the BHT records and with blue values alone representing t-d points below the 2.753oC/100m threshold change.
All points.
18
Impact On New Mexico
Estimated Temperature at 4 KM
Sedimentary Thickness – Contour Interval 1500 m
Idaho Nat Lab Geothermal Technologies Program &
Idaho Nat Lab Geospatial Sci & Eng
Rio Grande
Rift
19
A major importance of geothermal power production is that it has a high capacity factor.
Thus geothermal impacts base load electrical demand.
Geothermal Energy Association,West Coast Geothermal Finance & Development Workshop, May 2007
Importance Of Geothermal Power
20
Conclusions
New Mexico sits astride a high near surface heat flow trend that stretches from Colorado south to the Mexican border.
New Mexico is part of a broad trend of states with deeper oil and gas wells that extends from the Gulf Coast NNW to Montana.
West Texas Permian Basin geothermal investigations suggest that parts of New Mexico may also have geothermal power potential from deeper oil and gas wells.
Trans-Pecos region of West Texas has promise of geothermal power as part of the Rio Grande Rift, stretching from the Big Bend of Texas through New Mexico and into Colorado.
Geothermal energy may have the highest capacity factor of all the renewable energy resources available for power generation.