I progetti dimostrativi in VIGOR - Geotermia

Transcript

MAZARA DEL VALLO GEOTHERMAL ASSESSMENT, SICILY
Domenico Montanari1 and Vigor Team*
1CNR-Istituto
di Geoscienze e Georisorse, Pisa
39th Course of the International School of Geophysics
“Understanding Geological Systems for Geothermal Energy”
“Ettore Majorana” Foundation and Centre for Scientific Culture
Erice, Sicily | 25 September – 1 October, 2012
*The Vigor Team
Domenico Montanari, Giovanni Bertini, Serena Botteghi, Federica Caiozzi, Marco Doveri,
Giovanni Gianelli, Gianluca Gola, Adele Manzella, Angelo Minissale, Giordano Montegrossi,
EugenioTrumpy
Istituto di Geoscienze e Georisorse-CNR
Roberto de Franco, Grazia Caielli, Gianluca Norini
Istituto per la Dinamica dei Processi Ambientali-CNR
Prof. Salvatore Monteleone, Prof. Raimondo Catalano
Dipartimento Scienze della Terra e del Mare, Università degli studi di Palermo
Antonio Contino, Carmelo Gennaro, Marina Iorio, Maria Sabatino, Giorgio Tranchida
Istituto per l'ambiente marino costiero-CNR
Prof. Maurizio Fedi e Mauro La Manna
Dipartimento di Scienze della Terra, Università degli Studi di Napoli Federico II
The study area
Mazara del Vallo
ERICE
Study area
Consiglio Nazionale delle Ricerche
Dipartimento Terra e Ambiente
Today Mazara del Vallo
is the most important
fishing port of Italy,
the economy has been
improved thanks to
the rich production of
grapes and wine,
citrus fruits and olives.
Regional geological setting
(Geological Map of Italy-ISPRA, 2011)
Regional geological setting
(Structural model of Italy, 1992)
(Catalano et al., 2002)
Heat flow map of Sicily (mW/m2)
Deep meteoric water infiltration
Low temperature convective/advective systems
(after Della Vedova et al. 2001)
Previous studies
A preliminary attempt
to evaluate the
geothermal
potentialities of Sicily
was performed by the
National Research
Council in the frame of
the inventories of
geothermal resources
(Catalano et al., 1982;
Fancelli et al, 1991;
Fancelli et al., 1994)
Mazara del Vallo
Fancelli et al., 1991
Available data at depth
Oil exploration in western Sicily started in
the late 1950s when several exploration
wells were drilled, and continued with the
acquisition of many seismic reflection
profiles and the drilling of new wells in
the1980s
Although it has not produced completely
satisfactory results for oil industry, this
hydrocarbon exploration provided a great
amount of data, resulting very suitable for
geothermal resource assessment.
Mazara del Vallo Area
Location map of wells and seismic reflection profile grid
aquired by AGIP (1979–1987).
Geological Map
Well-Log data analysis
Definition of potential geothermal reservoir
Erice
The reservoir could be
locally alimented also by
clastic sediments
Thermal Springs
Wells
Reservoir
Covers
Well Log Data
Gazzera 1
Top of the regional reservoir
Shallow aquifers
Top of the «effective»
reservoir
P
T
T
Gazzera 1 well data were kindly provided by ENI S.p.A
Well Log Data
Contrada Triglia 1
Top of the «effective»
reservoir
T
Shallow aquifers
Top of the regional reservoir
P
T
Geological cross-sections
Regional Geothermal Reservoir
3D geological model
Well Logs
Used Seismic profiles and well data
Seismic reflection profiles courtesy of ENI S.p.A
Seimic profiles interpretation
The Meso-Cenozoic carbonates (Trapanese–Saccense facies) are related to a group of
reflectors with a variable amplitude, medium-low frequency and good lateral
continuity, alternating with transparent zones, topped by a high amplitude, good
lateral continuity reflector
Seimic profiles interpretation
Miocene limestones
Top of the carbonate reservoir
Mazara del Vallo
study area
Vertical
Exaggeration V=2H
0
00
-2
50
0
-25
00
-250
0
-1
5
-200
0
00
291000
292000
293000
00
-15
4177000
-10
0
-5
00
-1
5
-10
00
4172000
Gazzera 1
00
-1000
-1
50
0
-2
00
0
0
Campobello-1
292000
-10
0
Map
Siciliy
21/09/2012
500
294000
295000
296000
1000 1500 2000 2500m
297000
00
-10
-2000
0
0
293000
00
291000
-15
0
4168000
00
-1
0
00
-10
0
290000
4168000
-1
5
4169000
289000
-100
4171000
4170000
• Self-sealing on the culmination of
structural high?
4170000
• Low permeability due to lithological
control?
4169000
-150
0
0
-1
-1500
0
00
-1
-3000
4175000
4174000
4173000
-2000
0
50
-1
4171000
00
0
0
-5
-1000
4176000
0
00
0
-2
4172000
-15
100
0
-100
-200
-300
-400
-500
-600
-700
-800
-900
-1000
-1100
-1200
-1300
-1400
-1500
0
0-1600
0
-1 -1700
-1800
-1900
-2000
-2100
-2200
-2300
-2400
0
-2500
50
1
-2600
-2700
-2800
-2900
-3000
-3100
-3200
-3300
-3400
-3500
-3600
-3700
-3800
-3900
-4000
-4100
-4200
-4300
00 -4400
5
-4500
-1
-4600
-4700
-4800
-4900
-5000
-5100
0
50 -5200
-2 00-5300
-5400
-30 -5500
-5600
-5700
4173000
Top of the effective
-2000
reservoir
200
4174000
0
-2000
0
-20
?
0
297000
4175000
0
-15
296000
4176000
-2000
295000
4177000
00
-10
-2500
0
Top of the regional
reservoir-2000
00
-2
00
-20
294000
00
00
290000
00
289000
-10
-20
-25
00
00
-25
00
-2
5
-2500
-25
-2500
Gravity Data
Depth in Km
Depth (Km)
Top of carbonate basement
Study area
N
The carbonates top was reconstructed by means of the analysis of the
average density contrast between miocene covers and carbonates
Fluid geochemistry
Wells
Thermal springs
Mazara area
Fluid geochemistry
Na/K and K/Mg geothermometers
Isotopic evidences of regional
circulation systems
δ18O of “Acqua Pia” thermal spring is about -6.7 ‰ (Fancelli et al,1991; Grassa et al., 2006).
 The thermal spring
drains a groundwater regional flow which is fed
Based on the local “δ18O‰ – altitude” relationship (by Fancelli et al., 1991) such value
also
fromancarbonate
outcrops
external
the
Magaggiaro area.
indicate
average altitude
of infiltration
higherof
than
600Mt.
m a.s.l.
Moreover the tritium value of 0.0 TU (err. ± 0.4) analyzed by Fancelli et al. (1991) indicates
an average residence time of groundwater longer than 50 years
Temperature measurements within
the reservoir
Reservoir Temperature vs. Depth
Contrada Triglia well
Gazzera well
• Available measurements pointed out an increase of temperatures from 35-40°C
up to 95-100°C
• A gradient of about 10 °C km-1 was observed in proximal and distal parts of the
system, in respect to recharge areas.
• A regional scale reservoir with a significant convective flow can be highlighted
Activities to be completed
Magnetotelluric profile across the
area (delayed for early grape harvest)
Activities to be completed
• Well Core analysis @ ENI Core
Repository
• Permeability tests in situ and in lab
• Thermo fluid dynamic model to give an
estimation of a geothermal well
productivity
• Plant design (District heating and house
cooling on demand, cascade direct use)
Preliminary Conclusions
 lateral continuity at depth of mesozoic carbonates;
 homogeneous gradient of temperature (about 10°C/km) and
a temperature increasing moving away from the carbonate
outcrops (30-40 ° up to 100 °C)
 altitudes of recharge and water residence times in the aquifer
suggest the presence of wide circulation systems
 the main recharge areas of the geothermal system were
identified
 Based on all these information, a W-Sicily regional scale
reservoir could be depicted
Preliminary Conclusions
• In the Mazara del Vallo area a resource with a
temperature of about 100°C can be expected at depths
between 1200 and 2000 m b.g.l.
ERICE, September 2012
Domenico Montanari
[email protected]

I progetti dimostrativi in VIGOR - Geotermia

Transcript

Documenti analoghi

La casbah di Mazara. Etnografia di uno spazio della migrazione

SACCA RESERVOIR IN PVC MONOUSO

ANNO 2015 - Comune di Mazara del Vallo

Fabbricati costruiti per esigenze commerciali

sezioni geologiche e reservoir geotermico

X - Comune di Mazara del Vallo

ROUTE OF INTRACEREBROSPINAL FLUID CHEMOTHERAPY

Laurea Triennale in Scienze Naturali

Loading...

Anno VI n°14 30-09-2004

L`Opinione n°01 del 20-01-2014

Curriculum Vitae Europass

Un super bacino per il Missouri

SANTANTONIO- Rilevamento Geol 2015-16

La tecnica 4-time-lapsed seismic reflection

HIV, pERSISTENzA, RESERVOIRS, ERADICAzIONE - Cure

EAD., Tecniche di produzione, in Bononia docet, in BdN 1988, suppl

L`importanza dell`analisi di facies sedimentarie in studi di

Brochure del Master in "Petroleum Engineering and Operations"

Scientific correspondence in the archive of the General Directorate

Cambiamento climatico e salute

CQR 2016 PROVINCIALDAY F TP