Regional Sequence Stratigraphy of the Upper Cretaceous La Luna Formation in the Magdalena Valley Basin, Colombia.

Galvis-Portilla, Henry; Higuera-Díaz, I. Camilo; Cespedes, Sandra; Ballesteros, Cesar Ivan; Forero, Silvia; Marfisi, Nelbett; Cantisano, Maria; Pineda, Edgar; Pachon, Zarith; Slatt, Roger M.; Ramirez, Rigo; Guzmán, Georgina; Torres, Ángela

doi:10.15530/urtec-2014-1934959

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…De hecho, hasta el mismo Morales y The Colombian Petroleum Industry (1958,653) aceptan que la Formación La Luna de Venezuela es distinta a la de Colombia, cuando afirma que "However, in Colombia, the formation can be subdivided into three members the Salada, Pujamana and Galembo". Además, está totalmente justificado el rango de formación para las unidades Salada, Pujamana y Galembo, pues han sido ampliamente reconocidas y cartografiadas, tanto en superficie como en el subsuelo, en todo el VMM, es decir, mucho más allá de sus localidades tipo en el sector de El Tablazo y sus alrededores (Taborda 1965;Ward et al 1973;Maughan et al 1979;Ballesteros et al 2013;Galvis et al 2014;Moreno-Sánchez 2019).…”

Section: Historia De La Nomenclatura Estratigráfica Formación La Lunaunclassified

“Formación La Luna”: expresión espuria en la geología colombiana

2020

Estudios Geológicos Y Paleontológicos Sobre El Cretácico en La Región Del Embalse Del Río Sogamoso, Valle Medio Del Magdalena

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The Hidrosogamoso Project in the Middle Magdalena Valley (around El Tablazo) presents upper Cretaceous strata refer as "La Luna Formation" (Morales and The Colombian Petroleum Industry 1958, 653-655) composed from base to top by the Salada, Pujamana, Galembo and La Renta formations. The contact with the underlaying El Salto Formation is conformable, and with the overlaying Umir Formation is disconformable (sensu Howe 1997, 135). The thickness of the stratigraphic interval is 316 m in the Aguablanca creek section, of which 118 m are from the Salada Formation, 57 m from the Pujamana Formation, 96 m from the Galembo Formation and 45 m from the La Renta Formation. In the Montebello ranch stratigraphic section, the measured thickness is 304 m, with 111 m (incomplete) for the Pujamana Formation, 177 m (incomplete) for the Galembo Formation and 16 m (incomplete) for the La Renta Formation; the Salada Formation and the lower part of the Pujamana Formation do not appear there; furthermore, the La Renta Formation is faulted and folded, and only the base was measured (16 m), but 693 m from the end of the section by the road to Montebello ranch in a monocline at the west flank of the Chucurí anticline, a measure track adds 61 m by which the La Renta Formation would have at least a thickness of 77 m. The thickening in the Pujamana, Galembo and La Renta formations in the Montebello stratigraphic section is explained by means of higher rates of tectonic subsidence and sediment supply in this area, related to normal faulting affecting the sedimentation in the Middle Magdalena Valley and the Hidrosogamoso project area. A new lithostratigraphic unit for the Middle Magdalena Valley it is formally proposed and is called the Formación La Renta, characterized by his phosphorite content and fino-granular siliceous rocks, with local concentrations of benthic foraminifera of the Siphogenerinoides genera.

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Section: Historia De La Nomenclatura Estratigráfica Formación La Lunaunclassified

“Formación La Luna”: expresión espuria en la geología colombiana

2020

Estudios Geológicos Y Paleontológicos Sobre El Cretácico en La Región Del Embalse Del Río Sogamoso, Valle Medio Del Magdalena

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“…Since then, researchers have tried to identify three members in La Luna Formation, creating difficulties in the identification of the unit and major correlation problems; for example, Casadiego & Rios (2016) indicated that the "pujamana" member of other authors corresponds to the "galembo" member at the Aguablanca section W of Bucaramanga. The enormous thickness of approximately 3000 feet from cores reported by Galvis-Portilla et al (2014) also suggests that the authors may have included strata from more than one unit in their definition of La Luna Formation. The thickness of the Turonian to Santonian limestones exposed at the type locality of La Luna Formation in Venezuela and in the rest of the basin in Colombia (Guerrero, ) reaches a maximum measured thickness of 700 to 900 feet, so it is difficult to believe that the unit could reach 2500 to 3000 feet in oil wells.…”

Section: Toc and Thermal Maturitymentioning

confidence: 99%

Chapter 9

SGC¹

2019

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The nonconventional hydrocarbon potential of the Cretaceous Colombian back-arc basin is explored taking into consideration the properties of fine-grained units, including biomicrite, marlstone, and shale, in terms of total organic carbon content, gas content, vitrinite reflectance, porosity, permeability, pyrolysis, and organic geochemistry of samples collected from outcrop sections and wells in several localities in the core of the Eastern Cordillera, Middle Magdalena Valley, and Catatumbo. The best properties are from the Turonian to Santonian limestones of La Luna Formation and time-equivalent units, but other limestones of Albian and Campanian ages, including the Hilo Formation and the Oliní Group, have potential. La Luna Formation was deposited during a transgressive and relatively high sea level interval; it is composed of biomicrites of planktonic foraminifera, with minor interbedding of marlstones. Diagenetic cherts resulting from replacement of calcite by quartz are also present. The average total organic carbon values of the formation are excellent, between 4.9 and 11.6% for sections in the area of Aguachica, 5.4 to 8.6% in the area of Barichara, and 6.1 to 7.2% in the area of Cúcuta. These high values of total organic carbon are systematically associated with moderate values of thermal maturity, between 0.8 and 1.3% Ro; the interval contains mainly type II kerogen, with minor mixtures of types II-III.

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“…For all three units, neighboring areas around the et al (2019). Petrographic data suggest that most of the quartz in this source rocks is related to diagenetic processes rather than its depositional environment (e.g., Acevedo et al, 2012a;Galvis-Portilla et al, 2014). In all cases, clays content is lower than 40%, suggesting, that most of the units have an excellent brittleness quality which might help in future completion designs, also agreeing previously published petrophysical models which proposes at least two landing zones within the Salada and Galembo formations (e.g., Piedrahita and Aguilera, 2017a;Veiga et al, 2023).…”

Section: Petrophysics and Pore Pressure Analysismentioning

confidence: 99%

Sweet spot areas for shale oil and shale gas plays in the Upper Cretaceous rocks of the Middle Magdalena Valley, Colombia: insights from basin modeling

Pastor-Chacón,

Aguilera,

Triana

et al. 2023

Front. Earth Sci.

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The Middle Magdalena Valley Basin (MMVB) in Colombia has a long history of conventional hydrocarbon exploration and production, with a cumulative production of 2.75 billion barrels of oil as of December 2021. Recent interest has been directed towards unconventional hydrocarbon plays within the basin due to the fine-grained nature of its Cretaceous source rocks and their mineralogy and mechanical properties. This study presents a three-dimensional basin model for three Upper Cretaceous source rocks, known as the “La Luna Formation,” within the MMVB. The model was developed using new data from five outcrops, 7,640 km of 2D seismic lines, and forty-one boreholes, as well as additional data sets such as X-ray diffraction analyses, pyrolysis analyses, well-log correlations, facies analysis, fracture pattern prediction, pore pressure analysis, heat flow estimations, and petrophysical data. The model estimates total retained oil and gas volumes to be 7.95 billion barrels and 4.21 trillion cubic feet in most probable scenarios, after a 15% recovery factor. Seismic interpretation reveals pre-Eocene structures beneath Paleogene and Neogene sediments, and the thickness variation of the source rocks from south to north of the basin. Petrophysical modeling shows effective porosities ranging from 2%–12% and organic porosities lower than 0.1%, with parts of the succession that might correspond to a carrier bed play. From a geomechanical perspective, we identified several brittle strata based on the higher concentrations of carbonates and quartz, and the areas with a higher probability of occurrence of natural fractures. Pore pressure analysis of multiple wells shows that wells in which the Middle Eocene unconformity has beveled the source rocks have no sealing capacity, becoming a risk for the play. The results suggest potential for unconventional hydrocarbon plays in the MMVB, with sweet spot areas being primarily controlled by porosity, thermal maturity, gas-oil ratios, and retained oil and gas volumes, as well as to a lesser degree, the probability of natural fractures and pore pressure conditions. However, further exploration is needed to constrain uncertainties regarding facies and source rock quality, particularly within the depocenters of the basin, in order to prove the economic feasibility of these unconventional plays.

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Regional Sequence Stratigraphy of the Upper Cretaceous La Luna Formation in the Magdalena Valley Basin, Colombia.

Cited by 8 publications

References 7 publications

“Formación La Luna”: expresión espuria en la geología colombiana

“Formación La Luna”: expresión espuria en la geología colombiana

Chapter 9

Sweet spot areas for shale oil and shale gas plays in the Upper Cretaceous rocks of the Middle Magdalena Valley, Colombia: insights from basin modeling

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