Salt structures from inversion of residual gravity anomalies: application in Santos Basin, Brazil

dc.contributoren-US
dc.contributorpt-BR
dc.creatorConstantino, Renata Regina
dc.creatorMolina, Eder Cassola
dc.creatorSouza, Iata Anderson de
dc.creatorVincentelli, Maria Gabriela Castillo
dc.date2019-07-30
dc.date.accessioned2022-12-15T20:12:10Z
dc.date.available2022-12-15T20:12:10Z
dc.identifierhttps://ppegeo.igc.usp.br/index.php/bjg/article/view/13327
dc.identifier10.1590/2317-4889201920180087
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5360170
dc.descriptionThe Santos Basin, with an area of about 350.000 km2, 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.en-US
dc.descriptionpt-BR
dc.formatapplication/pdf
dc.languageeng
dc.publisherSociedade Brasileira de Geologiapt-BR
dc.relationhttps://ppegeo.igc.usp.br/index.php/bjg/article/view/13327/12920
dc.rightsDireitos autorais 2019 Brazilian Journal of Geologypt-BR
dc.sourceBrazilian Journal og Geology; v. 49, n. 1 (2019)en-US
dc.sourceBrazilian Journal of Geology; v. 49, n. 1 (2019)pt-BR
dc.source2317-4692
dc.source2317-4889
dc.subjectSantos basin; Pre-salt; Gravity anomalies; Crustal structure; Diapirism; Inverse theory.en-US
dc.subjectpt-BR
dc.titleSalt structures from inversion of residual gravity anomalies: application in Santos Basin, Brazilen-US
dc.titlept-BR
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeen-US
dc.typept-BR


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