Academic Journal
Synthetic Seismic Reflection Modelling in a Supercritical Geothermal System: An Image of the K-Horizon in the Larderello Field (Italy).
| Τίτλος: | Synthetic Seismic Reflection Modelling in a Supercritical Geothermal System: An Image of the K-Horizon in the Larderello Field (Italy). |
|---|---|
| Συγγραφείς: | de Franco, R., Petracchini, L., Scrocca, D., Caielli, G., Montegrossi, G., Santilano, A., Manzella, A. |
| Πηγή: | Geofluids; 3/28/2019, p1-21, 21p, 4 Diagrams, 2 Charts, 8 Graphs, 2 Maps |
| Θεματικοί όροι: | Seismic reflection method, Seismic prospecting, Geothermal resources, Imaging systems in seismology |
| Γεωγραφικοί όροι: | Italy |
| Περίληψη: | We tested synthetic seismic reflection modelling along a seismic line (CROP-18A) in the geothermal field at Larderello (Italy). This seismic line is characterized by a discontinuous but locally very bright seismic marker, named K-horizon, which has been associated with various geological processes, including the presence of fluids at supercritical conditions. Geological and geophysical data were integrated in order to develop a 3D subsurface model of a portion of the Larderello field, where extremely high heat flow values have been recorded. In the study area, the K-horizon is particularly shallow and supercritical deep conditions were accessed at depth. The 2D model of the main geological units up to the K-horizon was extracted from the 3D model along the CROP-18A and used to generate the synthetic TWT stacked seismic sections which were then compared with the observed stacked CROP-18A seismic section. To build the synthetic sections, generated through the exploding reflector approach, a 2D velocity model was created assigning to each pixel of the model a constant P-wave velocity corresponding to the related geological unit. The geophysical parameters and the geological model reconstructions used in the modelling process derive from a multidisciplinary integration process including geological outcrop analogues, core samples, and geophysical and laboratory information. Two geophysical models were used to test the seismic response of the K-horizon, which is associated with (1) a lithological discontinuity or (2) a physically perturbed layer, represented by a randomized velocity distribution in a thin layer. For the latter geophysical model (i.e., the physically perturbed layer), we have tested three different scenarios changing the shape and the thickness of the modelled layer. Despite the reliable calibration implied by the use of homogeneous units, the seismic modelling clearly shows that the physically perturbed layer provides a better explanation of the reflectivity features associated with the K-horizon. [ABSTRACT FROM AUTHOR] |
| Copyright of Geofluids is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Βάση Δεδομένων: | Complementary Index |
| FullText | Links: – Type: other Text: Availability: 0 |
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| Header | DbId: edb DbLabel: Complementary Index An: 135595324 RelevancyScore: 874 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 873.724670410156 |
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| Items | – Name: Title Label: Title Group: Ti Data: Synthetic Seismic Reflection Modelling in a Supercritical Geothermal System: An Image of the K-Horizon in the Larderello Field (Italy). – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22de+Franco%2C+R%2E%22">de Franco, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Petracchini%2C+L%2E%22">Petracchini, L.</searchLink><br /><searchLink fieldCode="AR" term="%22Scrocca%2C+D%2E%22">Scrocca, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Caielli%2C+G%2E%22">Caielli, G.</searchLink><br /><searchLink fieldCode="AR" term="%22Montegrossi%2C+G%2E%22">Montegrossi, G.</searchLink><br /><searchLink fieldCode="AR" term="%22Santilano%2C+A%2E%22">Santilano, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Manzella%2C+A%2E%22">Manzella, A.</searchLink> – Name: TitleSource Label: Source Group: Src Data: Geofluids; 3/28/2019, p1-21, 21p, 4 Diagrams, 2 Charts, 8 Graphs, 2 Maps – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Seismic+reflection+method%22">Seismic reflection method</searchLink><br /><searchLink fieldCode="DE" term="%22Seismic+prospecting%22">Seismic prospecting</searchLink><br /><searchLink fieldCode="DE" term="%22Geothermal+resources%22">Geothermal resources</searchLink><br /><searchLink fieldCode="DE" term="%22Imaging+systems+in+seismology%22">Imaging systems in seismology</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Italy%22">Italy</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We tested synthetic seismic reflection modelling along a seismic line (CROP-18A) in the geothermal field at Larderello (Italy). This seismic line is characterized by a discontinuous but locally very bright seismic marker, named K-horizon, which has been associated with various geological processes, including the presence of fluids at supercritical conditions. Geological and geophysical data were integrated in order to develop a 3D subsurface model of a portion of the Larderello field, where extremely high heat flow values have been recorded. In the study area, the K-horizon is particularly shallow and supercritical deep conditions were accessed at depth. The 2D model of the main geological units up to the K-horizon was extracted from the 3D model along the CROP-18A and used to generate the synthetic TWT stacked seismic sections which were then compared with the observed stacked CROP-18A seismic section. To build the synthetic sections, generated through the exploding reflector approach, a 2D velocity model was created assigning to each pixel of the model a constant P-wave velocity corresponding to the related geological unit. The geophysical parameters and the geological model reconstructions used in the modelling process derive from a multidisciplinary integration process including geological outcrop analogues, core samples, and geophysical and laboratory information. Two geophysical models were used to test the seismic response of the K-horizon, which is associated with (1) a lithological discontinuity or (2) a physically perturbed layer, represented by a randomized velocity distribution in a thin layer. For the latter geophysical model (i.e., the physically perturbed layer), we have tested three different scenarios changing the shape and the thickness of the modelled layer. Despite the reliable calibration implied by the use of homogeneous units, the seismic modelling clearly shows that the physically perturbed layer provides a better explanation of the reflectivity features associated with the K-horizon. [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Group: Ab Data: <i>Copyright of Geofluids is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1155/2019/8492453 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 21 StartPage: 1 Subjects: – SubjectFull: Italy Type: general – SubjectFull: Seismic reflection method Type: general – SubjectFull: Seismic prospecting Type: general – SubjectFull: Geothermal resources Type: general – SubjectFull: Imaging systems in seismology Type: general Titles: – TitleFull: Synthetic Seismic Reflection Modelling in a Supercritical Geothermal System: An Image of the K-Horizon in the Larderello Field (Italy). Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: de Franco, R. – PersonEntity: Name: NameFull: Petracchini, L. – PersonEntity: Name: NameFull: Scrocca, D. – PersonEntity: Name: NameFull: Caielli, G. – PersonEntity: Name: NameFull: Montegrossi, G. – PersonEntity: Name: NameFull: Santilano, A. – PersonEntity: Name: NameFull: Manzella, A. IsPartOfRelationships: – BibEntity: Dates: – D: 28 M: 03 Text: 3/28/2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 14688115 Titles: – TitleFull: Geofluids Type: main |
| ResultId | 1 |