Salt structures from inversion of residual gravity anomalies: application in Santos Basin, Brazil
Abstract The Santos Basin, with an area of about 350.000 km 2 , is the largest salt basin of the South Atlantic, and due to its high economic hydrocarbon potential, it is a recurrent theme in scientific studies. The salt structures over the region present great importance for hydrocarbon accumulatio...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Geologia
2019-04-01
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| Series: | Brazilian Journal of Geology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892019000100309&lng=en&tlng=en |
| _version_ | 1819057135081750528 |
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| author | Renata Regina Constantino Eder Cassola Molina Iata Anderson de Souza Maria Gabriela Castillo Vincentelli |
| author_facet | Renata Regina Constantino Eder Cassola Molina Iata Anderson de Souza Maria Gabriela Castillo Vincentelli |
| author_sort | Renata Regina Constantino |
| collection | DOAJ |
| description | Abstract The Santos Basin, with an area of about 350.000 km 2 , is the largest salt basin of the South Atlantic, and due to its high economic hydrocarbon potential, it is a recurrent theme in scientific studies. The salt structures over the region present great importance for hydrocarbon accumulation and the geological/geophysical studies are performed from seismic reflection data, which requires time and efforts for acquisition and data processing. We identify salt structures using a new workflow based on inversion of residual gravity anomalies, where we use the Moho and basement depths obtained from gravity inversion, followed by the calculation of the gravity residual anomaly, assumed to be representative of the salt structures. This workflow is tested for a geological profile in the Santos Basin, and the results are evaluated along a 2D seismic section tied to well markers. The geometry of the stratified salt obtained from gravity inversion correlates with the seismic interpretation, with the advantage of estimating the entire salt package, including halite and stratified salt. With only seismic data, sometimes the stratified salt can be misinterpreted as sediments. The procedure can be applied to identify salt in sedimentary basins where seismic data is unavailable or of low quality. |
| first_indexed | 2024-12-21T13:34:29Z |
| format | Article |
| id | doaj.art-be2b13673f9e464097ab765b16209a0f |
| institution | Directory Open Access Journal |
| issn | 2317-4692 |
| language | English |
| last_indexed | 2024-12-21T13:34:29Z |
| publishDate | 2019-04-01 |
| publisher | Sociedade Brasileira de Geologia |
| record_format | Article |
| series | Brazilian Journal of Geology |
| spelling | doaj.art-be2b13673f9e464097ab765b16209a0f2022-12-21T19:02:13ZengSociedade Brasileira de GeologiaBrazilian Journal of Geology2317-46922019-04-0149110.1590/2317-4889201920180087S2317-48892019000100309Salt structures from inversion of residual gravity anomalies: application in Santos Basin, BrazilRenata Regina ConstantinoEder Cassola MolinaIata Anderson de SouzaMaria Gabriela Castillo VincentelliAbstract The Santos Basin, with an area of about 350.000 km 2 , is the largest salt basin of the South Atlantic, and due to its high economic hydrocarbon potential, it is a recurrent theme in scientific studies. The salt structures over the region present great importance for hydrocarbon accumulation and the geological/geophysical studies are performed from seismic reflection data, which requires time and efforts for acquisition and data processing. We identify salt structures using a new workflow based on inversion of residual gravity anomalies, where we use the Moho and basement depths obtained from gravity inversion, followed by the calculation of the gravity residual anomaly, assumed to be representative of the salt structures. This workflow is tested for a geological profile in the Santos Basin, and the results are evaluated along a 2D seismic section tied to well markers. The geometry of the stratified salt obtained from gravity inversion correlates with the seismic interpretation, with the advantage of estimating the entire salt package, including halite and stratified salt. With only seismic data, sometimes the stratified salt can be misinterpreted as sediments. The procedure can be applied to identify salt in sedimentary basins where seismic data is unavailable or of low quality.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892019000100309&lng=en&tlng=enSantos basinpre-saltgravity anomaliescrustal structurediapirisminverse theory |
| spellingShingle | Renata Regina Constantino Eder Cassola Molina Iata Anderson de Souza Maria Gabriela Castillo Vincentelli Salt structures from inversion of residual gravity anomalies: application in Santos Basin, Brazil Brazilian Journal of Geology Santos basin pre-salt gravity anomalies crustal structure diapirism inverse theory |
| title | Salt structures from inversion of residual gravity anomalies: application in Santos Basin, Brazil |
| title_full | Salt structures from inversion of residual gravity anomalies: application in Santos Basin, Brazil |
| title_fullStr | Salt structures from inversion of residual gravity anomalies: application in Santos Basin, Brazil |
| title_full_unstemmed | Salt structures from inversion of residual gravity anomalies: application in Santos Basin, Brazil |
| title_short | Salt structures from inversion of residual gravity anomalies: application in Santos Basin, Brazil |
| title_sort | salt structures from inversion of residual gravity anomalies application in santos basin brazil |
| topic | Santos basin pre-salt gravity anomalies crustal structure diapirism inverse theory |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892019000100309&lng=en&tlng=en |
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