Cerro Pabellón geothermal plant: a success story€¦ · Cerro Pabellón Geothermal Project, Chile...
Transcript of Cerro Pabellón geothermal plant: a success story€¦ · Cerro Pabellón Geothermal Project, Chile...
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Cerro Pabellón geothermal
plant: a success story
Guido Cappetti
GEOLACSantiago - Chile – July 17, 2019
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Cerro Pabellón Geothermal Project, Chile 2
Geothermal resources in Chile
Estimated MW50 - 150
150 - 250150 - 250
100 - 400100 - 40050 - 10050 - 100
10 - 5010 - 50250 - 500
50 - 100
100 - 250100 - 250100 - 300100 - 300
Estimated potential in some areas ̴ 900 – 2200 MW
Estimated total potential ̴ 3500 MW
50 - 100
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Cerro Pabellón Geothermal Project, Chile 3
Cerro Pabellón project
Geotérmica
del Norte S.A.
Joint Venture EGP-Enap
GDN company context
Geotermica del Norte (GDN) is a Joint Venture
between Enel Green Power and Enap for the
development of geothermal resources in Chile
At present Enel owns 84.6 % and ENAP 15.4 % of GDN 15.4%84.6%
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Location of Cerro Pabellón project
The project is located in the Desert of
Atacama, at about 100 km NE of
Calama and at an elevation of 4500 m
Location and main roads
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Síntesis Geocientífica
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The Pampa Apacheta Area attracted the
GDN interest for a series of peculiar geo-
scientific features:
A large and very well defined
“Extensional Graben Structure”.
The recent acid volcanism testified by
the characteristic 50k years old “Cerro
Pabellón Lava Dome”.
The presence of 2 over-heated
fumaroles on the top of the local
volcanic ridge.
The high temperatures values at
shallow depths, found by CODELCO
during fresh water exploration in this
sector.
Attractive features of the Pampa Apacheta Area
Cerro Pabellón: geo-scientific framework
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Cerro Pabellón: area of the project
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The surface exploration of the Cerro Pabellón areawas carried out between 2006 and 2007 and consistedin:
Geological studies by remote sensors and 3 distinctstratigraphy, volcanic and structural field surveys.
Geophysical studies of Magnetotelluric (110 sites),Gravity (200 sites) and Magnetic Field (200 km2
covered by airplane).
Geochemical sampling, analysis and interpretation oflocal thermal manifestations and bibliographicrecompilation.
Nº 1 slim hole was drilled in 2007, confirming thepresence of a very interesting thermal anomaly withtemperature of around 215°C at only 512 meters.
Surface exploration activities
GEOLOGY
GEOPHYSICS
GEOCHEMISTRY
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Location of the 4 deep exploratory wells
1
2
3
4
Graben Principal (NW)
Cerro Apacheta
Domo Dacitico
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Well CP-1: technical profile & static T-P Log
24
18 13
9 5
/8 (
SLO
TTED
LIN
ER)
CP1
460 m
Bottom Hole 1815 m
100 m
Main fracture 1760 m
Inj. Index = 9 m3/h/bar
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Well CP-1: production test
CPE-2
CP-1
Foto CP1 da lontano
CP-1
Reservoir Temperature ~ 260°C
Flow-rate ~ 300 t/h @ 8 bar WHP
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Cerro Pabellón development program
Accordingly to the positive results of the exploratory wells a resource assessment was carried out and a development program was implemented, including:
o The drilling of additional wells for production and reinjection purposes
o The construction of: 48 MW power plant Gathering system 80 km transmission line 220 kV Camp for 700 people located at 3850 m elevation, at a distance of 25
km from the project area
Considering the characteristics of the project area a high enthalpy binary plant (HE-ORC) with 2 x 24 MW units was selected
The first 24 MW unit was put in operation on March 31,2017and the second unit on June 12, 2017
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48 MW Geothermal Power Plant
24+24 MW gross High Entalpy Binary
4 Injection Wells
CP-3, CP-4 (exploration phase)
CP-4A, CP-10
6 Production Wells
CP-1 (exploration)
CP-5, CP-5A, CP-1A, CP-6 , CP-6A
Cerro Pabellón
Project Lay-out and Drilling activity
2 Bake-up Production Wells
CP-2A, CP-2B
Out of the 13 drilled wells only CP-2 is considered not usable for the plant operation
CP-10
CP-4CP-4A
CP-5CP-5A
CP-1CP-1A
CP-3
CP-2CP2-ACP-2B
CP-6CP-6A
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Flow diagram of the Binary Unit
BOILER
AIR COOLERSHEAT
RECOVERY
PUMP
STEAM
GENERADOR
TURBINE
REINJECTION
6.5 bar ; 162 ºC
90 ºC
21 bar ; 48 ºC
1 bar80 ºC
20 bar ; 155 ºC
22 bar20 ºC
1 bar ; 20 ºC
1 bar ; 48 ºC
CH3-CH-CH2-CH3
CH3
ISOPENTANE, Teb. = 28 ºC @ 1 bar
6.5 bar ; 162 ºC
BRINE
CONDENSADE
PRE-HEATER
126 ºC
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HV Transmission line lay-out
Comuna de
Ollague
Comuna de
Calama
75 Km de
longitud
Área del
Proyecto
S/E CERRO
PABELLON
Rated capacity 100 MVA – 220 kV single circuit 218 Towers - Total length: 80 km
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The Cerro Pabellón project
The first geothermal plant in Chile and South America
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The Cerro Pabellón project
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The Cerro Pabellón project
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The first geothermal plant in Chile and in South America
The Cerro Pabellón project
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The first geothermal plant in Chile and in South America
The Cerro Pabellón project
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Cerro Pabellón Third Unit
Already approved the construction of an additional 33 MW unit that will benefit for CapEX reduction thanks to all infrastructures already built up and to the availability of geothermal fluid.
The expansion of the geothermal project does not require any drilling activity.
The new unit will lean on the existing gathering system with the additional pipeline for connecting the CP2 well pad (+2 wells).
100% integration with existing mechanical, electrical, monitoring and control systems
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CSV – Creating Share Value
In the area of the project there are 6 Indigenous Communities:
Ollague, Estacion San Pedro, Cupo, Toconce, Taira y Conchi Viejo
Socialization process together with Ministry of Energy – Division Participation y
Dialogue
• Project description
• Programs aimed at education, energy, tourism and economic developments
Constitution of 6 new small companies, managed by women of the Ollague
community that provided several services to the project: cleaning, laundry,
transport of personnel, food supply, others.
Tourism development program of the Alto el Loa territory
Electrification program
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Innovation and Sustainability in the Camp “INNOVABILITY”
Pilot plant for a sustainable electricity generation
A pilot plant 100% free of CO2 emissions, commercial size, composed of a 125 kV PV
plant and of a storage system based on Hydrogen and Lithium batteries was installed in
the camp. The energy produced 24/7 basis covered the energy needs of waste-water
purification plant and of other equipment (utilities).
Camp Carbon Foot print: CO2 neutralization
To reduce the Camp’s ecological footprint, in addition to our engagement in reducing
water consumption with a treatment plant and in recycling the waste, we achieved the
complete neutralization of the CO2 footprint. For this initiative we received an award
from the Ministry of Environment:
“Sello de Excelencia en la gestión de gases de efecto invernadero” Cerro
Pabellon was the First Project in Chile to receive this award
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Cerro Pabellón Geothermal Project
Camp Carbon Footprint: CO2 neutralization
MINISTERIO DE MEDIO AMBIENTE
1° EMPRESA EN GESTIONAR CON EXCELENCIA LOS GEI
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Gracias
Cerro Pabellón
Cerro Pabellón is not a simple geothermal plant,
but it was and still is an example of sustainability
and technological innovation in all various aspects
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Gracias
Cerro Pabellón