Quantitative biostratigraphic model for the tertiary of the lower Magdalena Basin, Colombian Caribbean
The reinterpretation of biostratigraphic information by new models and quantitative correlation techniques substantially improves its resolution and its correlative potential, thus minimizing oil exploration risks. With this aim, biostratigraphic information, i.e. first (FO) and last (LO) occurrence...
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2006
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ftuniveafit:oai:repository.eafit.edu.co:10784/26897 2023-05-15T18:00:50+02:00 Quantitative biostratigraphic model for the tertiary of the lower Magdalena Basin, Colombian Caribbean Cuartas, C. Jaramillo, C. Martínez, J.-I. Universidad EAFIT. Departamento de Geología Ciencias del Mar 2006-01-01 http://hdl.handle.net/10784/26897 https://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1863 spa spa Ecopetrol https://www.scopus.com/inward/record.uri?eid=2-s2.0-54149094656&partnerID=40&md5=28573de8f3a6e12a8f6b0b9c9cf48002 https://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1863 01225383 SCOPUS;2-s2.0-54149094656 http://hdl.handle.net/10784/26897 Ecopetrol Ct&f-Ciencia Tecnologia Y Futuro Correlation methods Inspection Mathematical models Optimization Regression analysis Stratigraphy biostratigraphy calibration Eocene modeling planktonic foraminifera Pliocene quantitative analysis Tertiary Colombia Magdalena Basin Magdalena Valley South America Foraminifera info:eu-repo/semantics/article article info:eu-repo/semantics/publishedVersion publishedVersion Artículo 2006 ftuniveafit 2022-03-07T07:54:54Z The reinterpretation of biostratigraphic information by new models and quantitative correlation techniques substantially improves its resolution and its correlative potential, thus minimizing oil exploration risks. With this aim, biostratigraphic information, i.e. first (FO) and last (LO) occurrence events of benthonic and planktonic foraminifera was analysed from sixteen wells from the Lower Magdalena Valley (LMV). The inconsistencies found in the biostratigraphic record, i.e. varying successions of first and last appearances of species from well to well as a result of several factors such incomplete sampling and preservation, true variation in the distribution of fosil taxa, etc., and the great amount of biostratigraphic data makes it practically impossible to accurately constrain basin history from biostratigraphic information by unaided visual inspection. This motivates the treatment of biostratigraphic information with new quantitative approaches, such as constrained optimization (CONOP9 software) and graphic correlation concepts (GraphCor 3,0) and the comparative method approach of Cooper et al. (2001). The succession of biostratigraphic events found through the application of each technique was statistically filtered and compared with Kendall tau coefficients whose values were 0,8. An optimal biostratigraphic succession of LOs was found and calibrated with the Berggren et al. (1995) global time scale by a LOESS regression model for the middle Eocene-Pliocene interval, thus revealing three major changes in sediment accumulation rates for the basin during this time interval: (1) middle Eocene to Oligocene, with low accumulation rates, (2) early Miocene to middle Miocene, with high accumulation rates and (3) late Miocene to Pliocene, with lower accumulation rates. The calibrated composite succession enabled the construction of age-well depth plots, which indicate periods of local deposition and accumulation rates, and periods of erosion, no deposition or very low accumulation rates (unconformities). The best plots were used to build a model for the correlation of unconformities, which shows that they are heterochronous, lasted at least 2,5 Ma, and are of limited extent. Finally, a correlation model was proposed that includes: (1) a time-calibrated succession of biostratigraphic events, and (2) a Haq curve that shows how each geologic period is recorded in each well. Article in Journal/Newspaper Planktonic foraminifera Universidad EAFIT, Medellin: Repositorio Institucional Kendall ENVELOPE(-59.828,-59.828,-63.497,-63.497) |
institution |
Open Polar |
collection |
Universidad EAFIT, Medellin: Repositorio Institucional |
op_collection_id |
ftuniveafit |
language |
Spanish |
topic |
Correlation methods Inspection Mathematical models Optimization Regression analysis Stratigraphy biostratigraphy calibration Eocene modeling planktonic foraminifera Pliocene quantitative analysis Tertiary Colombia Magdalena Basin Magdalena Valley South America Foraminifera |
spellingShingle |
Correlation methods Inspection Mathematical models Optimization Regression analysis Stratigraphy biostratigraphy calibration Eocene modeling planktonic foraminifera Pliocene quantitative analysis Tertiary Colombia Magdalena Basin Magdalena Valley South America Foraminifera Cuartas, C. Jaramillo, C. Martínez, J.-I. Quantitative biostratigraphic model for the tertiary of the lower Magdalena Basin, Colombian Caribbean |
topic_facet |
Correlation methods Inspection Mathematical models Optimization Regression analysis Stratigraphy biostratigraphy calibration Eocene modeling planktonic foraminifera Pliocene quantitative analysis Tertiary Colombia Magdalena Basin Magdalena Valley South America Foraminifera |
description |
The reinterpretation of biostratigraphic information by new models and quantitative correlation techniques substantially improves its resolution and its correlative potential, thus minimizing oil exploration risks. With this aim, biostratigraphic information, i.e. first (FO) and last (LO) occurrence events of benthonic and planktonic foraminifera was analysed from sixteen wells from the Lower Magdalena Valley (LMV). The inconsistencies found in the biostratigraphic record, i.e. varying successions of first and last appearances of species from well to well as a result of several factors such incomplete sampling and preservation, true variation in the distribution of fosil taxa, etc., and the great amount of biostratigraphic data makes it practically impossible to accurately constrain basin history from biostratigraphic information by unaided visual inspection. This motivates the treatment of biostratigraphic information with new quantitative approaches, such as constrained optimization (CONOP9 software) and graphic correlation concepts (GraphCor 3,0) and the comparative method approach of Cooper et al. (2001). The succession of biostratigraphic events found through the application of each technique was statistically filtered and compared with Kendall tau coefficients whose values were 0,8. An optimal biostratigraphic succession of LOs was found and calibrated with the Berggren et al. (1995) global time scale by a LOESS regression model for the middle Eocene-Pliocene interval, thus revealing three major changes in sediment accumulation rates for the basin during this time interval: (1) middle Eocene to Oligocene, with low accumulation rates, (2) early Miocene to middle Miocene, with high accumulation rates and (3) late Miocene to Pliocene, with lower accumulation rates. The calibrated composite succession enabled the construction of age-well depth plots, which indicate periods of local deposition and accumulation rates, and periods of erosion, no deposition or very low accumulation rates (unconformities). The best plots were used to build a model for the correlation of unconformities, which shows that they are heterochronous, lasted at least 2,5 Ma, and are of limited extent. Finally, a correlation model was proposed that includes: (1) a time-calibrated succession of biostratigraphic events, and (2) a Haq curve that shows how each geologic period is recorded in each well. |
author2 |
Universidad EAFIT. Departamento de Geología Ciencias del Mar |
format |
Article in Journal/Newspaper |
author |
Cuartas, C. Jaramillo, C. Martínez, J.-I. |
author_facet |
Cuartas, C. Jaramillo, C. Martínez, J.-I. |
author_sort |
Cuartas, C. |
title |
Quantitative biostratigraphic model for the tertiary of the lower Magdalena Basin, Colombian Caribbean |
title_short |
Quantitative biostratigraphic model for the tertiary of the lower Magdalena Basin, Colombian Caribbean |
title_full |
Quantitative biostratigraphic model for the tertiary of the lower Magdalena Basin, Colombian Caribbean |
title_fullStr |
Quantitative biostratigraphic model for the tertiary of the lower Magdalena Basin, Colombian Caribbean |
title_full_unstemmed |
Quantitative biostratigraphic model for the tertiary of the lower Magdalena Basin, Colombian Caribbean |
title_sort |
quantitative biostratigraphic model for the tertiary of the lower magdalena basin, colombian caribbean |
publisher |
Ecopetrol |
publishDate |
2006 |
url |
http://hdl.handle.net/10784/26897 https://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1863 |
long_lat |
ENVELOPE(-59.828,-59.828,-63.497,-63.497) |
geographic |
Kendall |
geographic_facet |
Kendall |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Ct&f-Ciencia Tecnologia Y Futuro |
op_relation |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-54149094656&partnerID=40&md5=28573de8f3a6e12a8f6b0b9c9cf48002 https://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1863 01225383 SCOPUS;2-s2.0-54149094656 http://hdl.handle.net/10784/26897 |
op_rights |
Ecopetrol |
_version_ |
1766170104623529984 |