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  • 1
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    Thermal anomalies and fluid geochemistry framework in occurrence of the 2000-2001 Nizza Monferrate seismic sequence (northern Italy): Episodic changes in the fault zone heat flow or chemical mixing phenomena? (2003)
    Copernicus
    Details
    Publication Date: 2003-08-31
    Description: The paper discusses the correlation between the heating of shallow groundwater over a 10 × 20 km wide area close to the town of Nizza Monferrato (Piemonte Region, Northern Italy) and the concomitant local seismic sequences during the period August 2000 – July 2001. The first seismic sequence started on 21 August 2000 with a Ml = 5.2 earthquake. Within few hours, the local authorities received calls alerting that the groundwater temperature rose from 10 to 30°C in many shallow wells. Our geochemical experimental data and the geological-seismotectonic framework do not allow the hypothesis of simple fluid mixing between the thermal reservoir of Acqui Terme and the Nizza-Monferrato shallow groundwater to explain the observed thermal anomalies. On the other hand, we invoke more complex processes such as frictional heating, mechano-chemistry, fault-valve mechanism, adiabatic decompression and hydrogeologically driven heat flow i.e., thermal effects due to variations of basin-scale permeability field. All these processes are able to transmit heat to the surface and to generate a transient incremental heat flow better than the mass transfer occurring typically when fluids from different reservoirs mix.
    Print ISSN: 1561-8633
    Electronic ISSN: 1684-9981
    Topics: Geography , Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 2
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    CO2 geological storage by ECBM techniques in the Sulcis area (SW Sardinia Region, Italy). (2006)
    Details
    Publication Date: 2012-02-03
    Description: An ECBM (Enhanced Coal Bed Methane as evolution of CBM techniques) pre-feasibility study started for the Sulcis Coal Province in December 2004 on the basis of the experience gathered: 1) by INGV, from ongoing and past projects dealing with CO2 geological storage, i.e., Weyburn test-field (Canada) by EOR techniques and from the studies of “CO2 analogues” in Italy; 2) by the coal industry of the Sulcis Province (Sotacarbo S.p.A. & Carbosulcis S.p.A.); 3) by ETH – Zurich, specifically on the coal adsorption properties, and 4) by IES S.r.l. reservoir engineering and gas storage industrial activity. This paper discusses the state of art of the project in the frame of the worldwide ECBM projects as a whole, on the basis of the yet acquired information and available experimental data. Environmental impact considerations are highlighted on the basis of the available Italian legal tools, giving hints for future EU, Italian and new regional legislation and strategies. A new concept of CO2 as “no waste” product in the coal/hydrocarbons provinces for ECBM/EOR exploitation is depicted, defining CO2 a “ natural climatealterant factor”. Geochemical, structural-geology, stratigraphic and reservoir engineering considerations are discussed. The first newly gathered experimental data, including CO2/CH4 coal adsorption capacity data are showed, even if they are preliminary. Starting from the geological and logistical available data, a MapInfo GIS structure was built up, to be jointed later to other EC “CO2 storage” data-GIS as the GETSCO EC project structure. The most important objective of this Phase I is the selection of the best for a ECBM test-pilot site, which will be followed (Phase II) by scaled up site and possibly by a future network (Phase III); these phases are foreseen to be accompanied by the selection of the progressively addedCO2 industrial sources (inserted in the Map-info GIS) to be used within the project economic spreadsheet model. CO2 geological storage in Sardinia is evaluated as a whole, considering the seismotectonic framework and the CO2 industrial sources available or foreseen in the next years.
    Description: Unpublished
    Description: Cagliari, Italy
    Description: open
    Keywords: Coal Bed Methane ; ECBM ; Sulcis Coal ; CO2 storage ; Clean Coal Technologies/Plants ; Coal/ Natural Gas exploitation ; 04. Solid Earth::04.04. Geology::04.04.99. General or miscellaneous ; 05. General::05.02. Data dissemination::05.02.01. Geochemical data
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
    Format: 804521 bytes
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  • 3
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    Adsorption of pure carbon dioxide and methane on dry coal from Sulcis coal Province (SW Sardinia, Italy). (2007)
    American Insitute of Chemical Engineers
    Details
    Publication Date: 2017-04-03
    Description: When coal seams are formed by compaction of plants, gases including methane are generated and accumulated into the coal cleats or adsorbed into the coal micropores. Such coalbed methane is normally recovered by means of reservoir-pressure depletion, i.e. by pumping out water and degassing the reservoir. A more attractive process with higher yields is the so-called Enhanced Coal Bed Methane recovery (ECBM), whereby carbon dioxide is pumped into the coal seam to displace methane thanks to higher CO2 adsorptivity. Injecting CO2 in unminable coal seams leads not only to methane recovery but also to CO2 sequestration. The factors still limiting the implementation of ECBM recovery are economical, i.e. lack of penalties for CO2 emissions, as well as technological and scientific, i.e. limited understanding of fundamental issues related to ECBM. Therefore, the goal of this study is to combine experimental measurements and modelling to characterize pure and multicomponent competitive adsorption of CO2 and CH4 on coal and study the coalbed dynamics using breakthrough experiments, including the effect of the injection of CO2 on matrix swelling and permeability. Since December 2004, a feasibility study throughout the Sulcis Coal Province in Sardinia [Quattrocchi, 2004] is in progress and one of its objectives is to correlate the results of the mentioned experiments with the compositional patterns of the coal, considering its role in the CBM-ECBM exploitation.
    Description: Published
    Description: 355-364
    Description: 4.4. Scenari e mitigazione del rischio ambientale
    Description: JCR Journal
    Description: reserved
    Keywords: Enhanced Coal Beds Methane ; Sulcis Coal CO2 storage ; 05. General::05.08. Risk::05.08.01. Environmental risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 4
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    Experimental study of CO2 sequestration by ECBM recovery: the case of Sulcis coal. (2007)
    Details
    Publication Date: 2017-04-03
    Description: An ECBM (Enhanced Coal Bed Methane) feasibility study started for the Sulcis Coal Province (SW Sardinia, Italy) in December 2004: geochemical, structural-geology, stratigraphic and reservoir engineering considerations are discussed. The first newly gathered experimental data are discussed, including: fluid geochemistry (major and minor elements, dissolved gases, C and He isotopic ratios) of the reservoir, coal composition and experimental data on CO2/CH4 adsorption on coal. A MapInfo GIS structure was built up including stratigraphical, geo-structural, hydrogeochemical, coal-compositional and environmental impact information as well as the CO2 sources location and typology. Even if these data could be preliminary with respect to the coal characteritics effectively located at the future injection depth, they highlighted both the challenging positive and negative aspects of the Sulcis Coal Province versus the exploitation of the ECBM technique. The most important objective of this phase I of the project is the selection of the best Sulcis ECBM test-pilot site, which will be followed (Phase II) by the choice of a scaled up site and possibly by a future network (Phase III). These phases are foreseen to be accompanied by the selection of progressively added CO2 industrial sources, to be used within the project economic spreadsheet model, actually in evolution. CO2 geological storage and CH4 production potentials in Sulcis have been grossly evaluated as a whole, in the frame of the Sardinia region CO2 sources, including the coal-fired power plants, both existent and foreseen (hundreds of millions of tonns of CO2 are possible to be stored underground in the next decades). The reservoir estimates, both for the CO2 injection and for the CH4 production are clearly involving to start the test-site phase exploitation, in the frame of an auspicabile international operative project.
    Description: Published
    Description: Trondheim, Norway
    Description: 4.4. Scenari e mitigazione del rischio ambientale
    Description: open
    Keywords: Absorption of CO2 and CH4 on coal ; ECBM Sulcis coal ; 05. General::05.08. Risk::05.08.01. Environmental risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
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  • 5
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    Shallow NE-SW extension and deep E-W right-lateral slip: coexisting seismogenic mechanisms as an expression of Southern Italy geodynamics (2007)
    Details
    Publication Date: 2017-04-04
    Description: The structural architecture of peninsular Italy is dominated by the Apennine mountain belt thrust over the Adriatic-Apulia foreland. In the southern Apennines most of the major seismicity gathers into a narrow ribbon stretched along the axis of the chain (Gruppo di Lavoro CPTI, 1999; Boschi et al., 2000). Large NW-SE trending seismogenic faults affect the uppermost 15 km of the crust with almost purely extensional kinematics (for a summary and review see: Valensise and Pantosti, 2001 and references therein). Northeast of the chain axis and up to the Apulia foreland, seismicity is often deeper than 15 km and mainly occurs on right-lateral E-W trending fault planes (Del Gaudio, 2001; Di Bucci and Mazzoli, 2003; Valensise et al., 2004; Fig. 1). The Gargano Promontory and – further to the East – the central Adriatic Sea are also punctuated by reverse faulting earthquakes on E-W trending planes (Vannucci et al., 2004). On land, historical earthquakes roughly concentrate within three distinct E-W running belts (Fig. 1), the northernmost of which includes the Mattinata Fault – a well documented strike-slip fault (Favali et al., 1993a, b) that today exhibits right-lateral motion and active deformation (Piccardi, 1998; Chilovi et al., 2000). The damage patterns of these earthquakes are often stretched in an E-W fashion, which further suggests the activation of E-W seismogenic sources. Our goal is to gain insight on the current dynamics of this region and contribute to identify the sources of the largest earthquakes (M〉5.5). To this end, we adopted a multidisciplinary approach that integrates the analysis of seismological data (historical and instrumental) with surface and subsurface geological data (geomorphology, structural geology, field geological survey, analyses of deep well logs and seismic reflection lines). We find that seismogenic structures in our study area originate at different depths and cut through the crust with two different mechanisms (Fig. 2): shallow, NW-SE oriented normal faulting within the Apennine chain and deeper E-W dextral strike-slip in the buried and outcropping Apulia foreland.
    Description: Unpublished
    Description: Florence, Italy
    Description: open
    Keywords: Seismotectonics ; Apulian platform ; Seismogenesis ; strike-slip faulting ; Southern Italy ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology ; 04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
    Format: 1325109 bytes
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  • 6
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    Strontium isotope (87Sr/86Sr) chemistry in produced oilfield waters: The IEA Weyburn CO2 monitoring and storage project. (2007)
    Details
    Publication Date: 2017-04-04
    Description: EnCana’s CO2 injection EOR project at Weyburn Saskatchewan (Canada) is the focal point of a multi-faceted research program, sponsored by the IEA GHG R&D and numerous international industrial and government partners. More than yearly strontium isotope, trace element and dissolved gas surveys were conducted by INGV in conjunction with the thrice yearly borehole fluid sampling trips performed by the Canadian partners. This paper focuses on the Sr isotope monitoring. Approximately 25 samples were collected over three years for 87Sr/86Sr analyses. At Weyburn, a water-alternating-gas (WAG) EOR technique is used to inject water and CO2 into the Mississippian Midale reservoir. 87Sr/86Sr ratios for produced fluids fall between 0.7077 and 0.7082, consistent with published values for Mississippian fluids and carbonate minerals. A small 87Sr/86Sr component of this produced fluid is derived from waters of the Cretaceous Mannville aquifer, which has been used for water-flooding EOR since 1959. The progressively more positive Sr isotope trend from 2001 to 2003 may be due to: 1) a smaller Mannville aquifer component in the water flooding process; and/or 2) the dissolution of Mississippian host rocks during the ongoing CO2 injection. Evidence that 87Sr/86Sr values are approaching those of Mississippian host-rock values may point towards zones of carbonate dissolution as a result of continuing CO2 injection. This hypothesis is strengthened by i) 13C data; ii) preliminary “gross composition” of dissolved gases (H2S, CO2, CH4, He, H2) and iii) by trace elements data
    Description: Published
    Description: 243-259
    Description: 4.4. Scenari e mitigazione del rischio ambientale
    Description: reserved
    Keywords: CO2 Capture & Storage ; Strontium isotopes in groundwater ; 05. General::05.08. Risk::05.08.01. Environmental risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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  • 7
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    Feasibility study (I stage) of CO2 geological storage by ECBM tecniques in the Sulcis Coal Province (SW Sardinia). (2007)
    Details
    Publication Date: 2020-02-24
    Description: An ECBM feasibility study started for the Sulcis Coal Province (SW Sardinia, Italy): available geochemical, structural-geology, stratigraphic and reservoir engineering considerations as well as the newly gathered experimental data are discussed, including: fluid geochemistry (major and minor elements, dissolved gases, C and He isotopic ratios) of different strata/reservoir, coal composition and experimental data on CO2/CH4 adsorption-desorption on coal. A MapInfo GIS structure was built up including stratigraphic, geo-structural, hydro-geochemical, coal-compositional and environmental-impact information as well as the CO2 sources location and typology. Despite preliminary, these data highlighted both the challenging positive and negative aspects of the Sulcis Coal Province versus the exploitation of the ECBM technique. The most important objective of this phase I of the project is the selection of the best Sulcis ECBM test-pilot site, which will be followed (Phase II-2007) by the choice of a scaled up site and possibly by a future network (Phase III-2008). CO2 geological storage and CH4 production potentials in Sulcis have been grossly evaluated as a whole, in the frame of the Sardinia region CO2 sources, including the coal-fired power plants, both existent and foreseen (hundreds of millions of tonnes of CO2 are possible to be stored underground in the next decades).
    Description: Unpublished
    Description: Trondheim, Norway
    Description: 4.4. Scenari e mitigazione del rischio ambientale
    Description: open
    Keywords: ECBM Sulcis coal ; CO2 capture & storage in deep coal ; 03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
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  • 8
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    Thermal anomalies and fluid geochemistry framework in occurrence of the 2000-2001 Nizza Monferrate seismic sequence (northern Italy): Episodic changes in the fault zone heat flow or chemical mixing phenomena? (2018)
    Details
    Publication Date: 2018-03-01
    Description: The paper discusses the correlation between the heating of shallow groundwater over a 10 × 20 km wide area close to the town of Nizza Monferrato (Piemonte Region, Northern Italy) and the concomitant local seismic sequences during the period August 2000 – July 2001. The first seismic sequence started on 21 August 2000 with a Ml = 5.2 earthquake. Within few hours, the local authorities received calls alerting that the groundwater temperature rose from 10 to 30°C in many shallow wells. Our geochemical experimental data and the geological-seismotectonic framework do not allow the hypothesis of simple fluid mixing between the thermal reservoir of Acqui Terme and the Nizza-Monferrato shallow groundwater to explain the observed thermal anomalies. On the other hand, we invoke more complex processes such as frictional heating, mechano-chemistry, fault-valve mechanism, adiabatic decompression and hydrogeologically driven heat flow i.e., thermal effects due to variations of basin-scale permeability field. All these processes are able to transmit heat to the surface and to generate a transient incremental heat flow better than the mass transfer occurring typically when fluids from different reservoirs mix
    Description: Published
    Description: 269-277
    Description: 6T. Variazioni delle caratteristiche crostali e precursori
    Description: N/A or not JCR
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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