IS - ISSN: 0149-1423
CO - CODEN: AABUD2
AN - ACCESSION NUMBER: 1996-071990
UD - UPDATE CODE: 199622
Registro 4642 de 5614 - GeoRef Disc 4: 1993-1996
TI - TITLE: Structural trend analysis by axial surface mapping of the northeastern thrust front of the Eastern Cordillera, Colombia.
AU - AUTHORS: Corredor-Freddy
AF - AUTHOR AFFILIATION: Occidental de Colombia, Santafe de Bogota, Colombia
BK - BOOK TITLE: In: AAPG international conference and exhibition; abstracts.
BA - BOOK AUTHORS: Anonymous
SO - SOURCE: AAPG Bulletin. 80; 8, Pages 1283. 1996.
PB - PUBLISHER: American Association of Petroleum Geologists. Tulsa, OK, United States. 1996.
CP - COUNTRY OF PUBLICATION: United-States
PY - PUBLICATION YEAR: 1996
CN - CONFERENCE INFORMATION: AAPG international conference and exhibition. Caracas, Venezuela. Sept. 8-11, 1996.
LA - LANGUAGE: English
AB - ABSTRACT: Three different structural styles have been recognized at the northernmost area of the eastern thrust front of the Eastern Cordillera of Colombia, using the structural trend analysis by axial surface mapping technique, (Shaw et al, 1994): (1) Thick skin thrust faults involving the Precambrian basement with vergence and direction of tectonic transport to SE, represented by the Guaicaramo thrust system; (2) Thin skin thrust faults with vergence to SE, represented by the Eastern thrust fault system. Two detachment levels were interpreted for this system--one at the bottom of the Lower Cretaceous sequence and the other at the bottom of the Upper Tertiary shales of the San Fernando Formation. A value of crustal shortening of 49% (21 Km.) has been calculated for this specific structural style; (3) Lateral strike slip faults with NE-SW and NW-SE predominant trends. This structural style is affecting and controlling the changes in the direction of the eastern thrust front in this area. The Uplift of the eastern thrust front of the Eastern Cordillera of Colombia began during the Early Miocene or Middle Miocene and is currently active.
DE - DESCRIPTORS: Andes-; Cenozoic-; clastic-rocks; Colombia-; Cretaceous-; decollement-; Eastern-Cordillera; evolution-; faults-; Guaicaramo-thrust-system; lateral-faults; Lower-Cretaceous; mapping-; Mesozoic-; Miocene-; Neogene-; San-Fernando-Formation; sedimentary-rocks; shale-; South-America; statistical-analysis; strike-slip-faults; tectonics-; Tertiary-; thrust-faults; trend-surface-analysis; uplifts-; upper-Tertiary
CC - CATEGORY CODES: 16-Structural-geology
DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document
BL - BIB LEVEL: Analytic
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States
IS - ISSN: 0149-1423
CO - CODEN: AABUD2
AN - ACCESSION NUMBER: 1996-071999
UD - UPDATE CODE: 199622
Registro 4643 de 5614 - GeoRef Disc 4: 1993-1996
TI - TITLE: Paleogeography of the Late Cretaceous of western Venezuela.
AU - AUTHORS: Erlich-R-N; Macsotay-O; Hall-S; Yeidling-C; Nederbragt-A-J; Pocknall-D-T; Steinbis-M-T; Giraldo-C
AF - AUTHOR AFFILIATION: Amoco, Houston, TX, United States
BK - BOOK TITLE: In: AAPG international conference and exhibition; abstracts.
BA - BOOK AUTHORS: Anonymous
SO - SOURCE: AAPG Bulletin. 80; 8, Pages 1288. 1996.
PB - PUBLISHER: American Association of Petroleum Geologists. Tulsa, OK, United States. 1996.
CP - COUNTRY OF PUBLICATION: United-States
PY - PUBLICATION YEAR: 1996
CN - CONFERENCE INFORMATION: AAPG international conference and exhibition. Caracas, Venezuela. Sept. 8-11, 1996.
LA - LANGUAGE: English
AB - ABSTRACT: Depositional environments of Late Cretaceous rocks of Western Venezuela were studied using published and proprietary seismic, biostratigraphic, and geochemical data from 155 subsurface and outcrop locations. Six paleogeographic maps (Cenomanian, Turonian, Coniacian/Santonian, early Campanian, late Campanian, Maastrichtian) show the influence of tectonic activity, climate, and oceanographic changes on the deposition of hydrocarbon reservoirs and source rocks. Cenomanian deposition was controlled by a regional transgression that began in the late Albian. La Luna and Capacho formation limestones and shales were deposited in the Maracaibo Basin, while Escandalosa Formation reservoir sandstones were deposited in the Barinas Basin. The La Luna was deposited in an anoxic environment, and is the most important source rock for Maracaibo. Deposition of organic-rich Navay Formation (Turonian) shales in Barinas marked the first maximum flooding event of the Late Cretaceous. Uplift in the southwestern ancestral Morida Andes caused deposition of condensed siliceous and phosphatic units, and reflects the influence of tectonic activity in Colombia. Paleobathymetric shallowing of this area continued through the Coniacian/Santonian and early Campanian with the Tachira Chert in the south, and Tres Esquinas Member phosphatic gravels in the north. Early Campanian deposition of Socuy Member limestones in Maracaibo was accompanied by Navay shales in Barinas. A second flooding event in the late Campanian produced the organic-lean Colon Formation shales. Deposition of the Tres Esquinas continued into the early Maastrichtian in the southwestern Andes, while uplift in Colombia caused shallowing and infilling of Maracaibo and Barinas by the Mito Juan and Burgunita formations, respectively.
DE - DESCRIPTORS: anaerobic-environment; Barinas-Basin; biostratigraphy-; Burgunita-Formation; Capacho-Formation; clastic-rocks; Colon-Formation; Cretaceous-; depositional-environment; Escandalosa-Formation; evolution-; geochemistry-; geophysical-methods; geophysical-surveys; La-Luna-Formation; Maracaibo-Basin; Mesozoic-; Mito-Juan-Formation; Navay-Formation; outcrops-; paleo-oceanography; paleobathymetry-; paleoclimatology-; paleogeography-; petroleum-; reservoir-rocks; sandstone-; sea-level-changes; sedimentary-rocks; seismic-methods; Socuy-Member; source-rocks; South-America; surveys-; Tachira-Chert; tectonics-; transgression-; Tres-Esquinas-Member; uplifts-; Upper-Cretaceous; Venezuela-; western-Venezuela
CC - CATEGORY CODES: 12-Stratigraphy
DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document
BL - BIB LEVEL: Analytic
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States
IS - ISSN: 0149-1423
CO - CODEN: AABUD2
AN - ACCESSION NUMBER: 1996-072021
UD - UPDATE CODE: 199622
Registro 4644 de 5614 - GeoRef Disc 4: 1993-1996
TI - TITLE: Tectonic domains of northern South America and the southern Caribbean.
AU - AUTHORS: Goodman-E-D; Green-A-R; Chisholm-T-J; Ando-C-J; Norton-I-O
AF - AUTHOR AFFILIATION: Exxon Production Research Company, Houston, TX, United States
BK - BOOK TITLE: In: AAPG international conference and exhibition; abstracts.
BA - BOOK AUTHORS: Anonymous
SO - SOURCE: AAPG Bulletin. 80; 8, Pages 1296-1297. 1996.
PB - PUBLISHER: American Association of Petroleum Geologists. Tulsa, OK, United States. 1996.
CP - COUNTRY OF PUBLICATION: United-States
PY - PUBLICATION YEAR: 1996
CN - CONFERENCE INFORMATION: AAPG international conference and exhibition. Caracas, Venezuela. Sept. 8-11, 1996.
LA - LANGUAGE: English
AB - ABSTRACT: The complex geology of this region reflects a tectonic history that includes Atlantic, Proto-Caribbean, Caribbean, Cocos, and Nazca plate interactions with "stable" South American crust. Allochthonous rocks of different ages and affinities were diachronously emplaced along this broad, semi-circular margin. Plate motions were translated into complex vertical tectonics, including basin subsidence and inversion, overthrusting and fault reactivation. Therefore, we have reconstructed this history on a microplate scale to (1) understand the underpinnings of sedimentary basins here, (2) unravel their structural complexity, and (3) better predict the trap style within prospective subbasins. We have identified over sixty tectonic domains or provinces that comprise the region, based upon crustal type and age, tectonostratigraphy, neotectonics, interpretation of seismic reflection, gravity and magnetics data, and structural analysis and timing. Maps, regional transects, and seismic sections illustrate the boundaries between provinces and variability along strike. A west-to-east-younging family of provinces from Colombia to the Atlantic Ocean are defined by basement-involved normal faults active in flexed, foreland basin settings. Detached, mixed-style and thick-skinned fold-thrust belts are compared and contrasted. The complexity and uniqueness of the petroliferous basins here limit the utility of global analogs for evaluating their potential.
DE - DESCRIPTORS: allochthons-; Atlantic-Ocean; Atlantic-Plate; basins-; Caribbean-Plate; Caribbean-region; Caribbean-Sea; Cocos-Plate; crust-; emplacement-; evaluation-; evolution-; faults-; flexure-; foreland-basins; geophysical-methods; geophysical-surveys; gravity-methods; interpretation-; magnetic-methods; microplates-; movement-; Nazca-Plate; neotectonics-; normal-faults; North-Atlantic; northern-South-America; overthrust-faults; petroleum-; plate-tectonics; possibilities-; reactivation-; reconstruction-; sedimentary-basins; seismic-methods; South-America; South-American-Plate; southern-Caribbean-Sea; subsidence-; surveys-; tectonics-; tectonostratigraphic-units; thick-skinned-tectonics; traps-; variations-; vertical-movements
CC - CATEGORY CODES: 18-Solid-earth-geophysics; 29A-Economic-geology,-geology-of-energy-sources
DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document
BL - BIB LEVEL: Analytic
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States
IS - ISSN: 0149-1423
CO - CODEN: AABUD2
AN - ACCESSION NUMBER: 1996-072057
UD - UPDATE CODE: 199622
Registro 4645 de 5614 - GeoRef Disc 4: 1993-1996
TI - TITLE: The evolution of the Piedemonte Llanero petroleum system, Cordillera Oriental, Colombia; 1, Structural evolution and play definition.
AU - AUTHORS: Graham-Rod; Howe-Spencer; O-Leary-John; Pulham-Andrew-J; Piggott-Neil; Vear-Alwyn; Warren-Edward-A
AF - AUTHOR AFFILIATION: BP Exploration, Bogota, Colombia
BK - BOOK TITLE: In: AAPG international conference and exhibition; abstracts.
BA - BOOK AUTHORS: Anonymous
SO - SOURCE: AAPG Bulletin. 80; 8, Pages 1297. 1996.
PB - PUBLISHER: American Association of Petroleum Geologists. Tulsa, OK, United States. 1996.
CP - COUNTRY OF PUBLICATION: United-States
PY - PUBLICATION YEAR: 1996
CN - CONFERENCE INFORMATION: AAPG international conference and exhibition. Caracas, Venezuela. Sept. 8-11, 1996.
LA - LANGUAGE: English
AB - ABSTRACT: The Piedemonte Llanero petroleum trend of the Cordillera Oriental in Colombia has proven to be one of the most prolific hydrocarbon provinces discovered in recent years. The Piedemonte Llanero is a fold and thrust belt of complex, multi-phase structuration and hydrocarbon generation. Following the discovery of the Cusiana and Cupiagua Fields (1991-2) in the southern part of the trend, BP and its partners began exploration further to the northeast. Early seismic data showed the existence of two structural trends: the frontal (or basal) thrust trend, with structures similar to Cusiana; and the overthrust (or duplex) trend, with multiple imbricated structures. Improved quality seismic data defined the gross structures and allowed them to be successfully drilled (1993-95), but did not give a constrained model for the kinematic evolution of the fold and thrust belt nor the petroleum play. This resulted in no clear predictive models for reservoir quality and hydrocarbon phase distribution in the undrilled parts of the trend. A wide variety of geological and geochemical analytical techniques including biostratigraphy, reservoir petrology, petroleum geochemistry, thermal maturity data, basin modelling and fluid inclusion studies were undertaken. These were iteratively integrated into the seismo-structural model to develop a constrained interpretation for the evolution of the Piedemonte Llanero petroleum system. This paper summarises the current understanding of the structural evolution of the trend, and the development of a major petroleum system. A companion paper details the reservoir petrography and petroleum geochemistry studies.
DE - DESCRIPTORS: Andes-; basin-analysis; biostratigraphy-; Colombia-; Cupiagua-Field; Cusiana-Field; duplexes-; Eastern-Cordillera; evolution-; faults-; fluid-inclusions; fold-and-thrust-belts; genesis-; geochemistry-; geophysical-methods; geophysical-surveys; history-; inclusions-; kinematics-; oil-and-gas-fields; overthrust-faults; petroleum-; petroleum-exploration; Piedemonte-Llanero-Trend; seismic-methods; South-America; structural-traps; surveys-; tectonics-; thermal-maturity; traps-
CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources
DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document
BL - BIB LEVEL: Analytic
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States
IS - ISSN: 0149-1423
CO - CODEN: AABUD2
AN - ACCESSION NUMBER: 1996-072060
UD - UPDATE CODE: 199622
Registro 4646 de 5614 - GeoRef Disc 4: 1993-1996
TI - TITLE: Evaluation and management of vertically drained reservoirs; Castilla and Chichimene fields, Llanos Basin, Colombia.
AU - AUTHORS: Hartshorn-Kelly-G
AF - AUTHOR AFFILIATION: Chevron Petroleum Company of Colombia, Santafe de Bogota, Colombia
BK - BOOK TITLE: In: AAPG international conference and exhibition; abstracts.
BA - BOOK AUTHORS: Anonymous
SO - SOURCE: AAPG Bulletin. 80; 8, Pages 1300. 1996.
PB - PUBLISHER: American Association of Petroleum Geologists. Tulsa, OK, United States. 1996.
CP - COUNTRY OF PUBLICATION: United-States
PY - PUBLICATION YEAR: 1996
CN - CONFERENCE INFORMATION: AAPG international conference and exhibition. Caracas, Venezuela. Sept. 8-11, 1996.
LA - LANGUAGE: English
AB - ABSTRACT: The Castilla and Chichimene NE fields, operated by Chevron, are located in the southern Llanos basin of Colombia. The Castilla field, with an estimated 2.3 Billion BBLS OOIP, produces heavy 140 API oil, while the Chichimene NE field with an estimated 480 MMBBLS OOIP, produces a lighter 200 API oil. Production is from multiple sandstone reservoirs of the Tertiary San Fernando and the Cretaceous Guadalupe Formations, and from massive non-marine sands of the Cretaceous Une Formation. Early problems with water coning and high water cuts led to detailed geologic study and engineering simulation to determine the most effective methods of reservoir management. The fresh nature of the connate water made evaluation more complicated, but results of RST logging runs (Reservoir Saturation Tool) on producing wells supports the conclusions of the simulation studies regarding the potential for vertical drainage of the reservoir. As a result, the massive sands of the Une Formation can be perforated in the upper portion of the reservoir only, still enabling effective drainage of the lower reservoir while reducing water production and coning problems.
DE - DESCRIPTORS: Castilla-Field; Cenozoic-; Chichimene-Field; clastic-rocks; Colombia-; connate-waters; Cretaceous-; drainage-; evaluation-; ground-water; Guadalupe-Formation; Llanos-; Mesozoic-; oil-and-gas-fields; petroleum-; petroleum-engineering; production-; reservoir-rocks; San-Fernando-Formation; sandstone-; saturation-; sedimentary-rocks; simulation-; South-America; Tertiary-; Une-Formation; water-; wells-
CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources
DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document
BL - BIB LEVEL: Analytic
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States
IS - ISSN: 0149-1423
CO - CODEN: AABUD2
AN - ACCESSION NUMBER: 1996-072062
UD - UPDATE CODE: 199622
Registro 4647 de 5614 - GeoRef Disc 4: 1993-1996
TI - TITLE: Cusiana Trend exploration, Llanos foothills, Colombia; the opening of a new hydrocarbon province.
AU - AUTHORS: Hayward-A-B; Addison-F-T; O-Leary-J; Espinosa-C
AF - AUTHOR AFFILIATION: BP Exploration, VEN, Venezuela
BK - BOOK TITLE: In: AAPG international conference and exhibition; abstracts.
BA - BOOK AUTHORS: Anonymous
SO - SOURCE: AAPG Bulletin. 80; 8, Pages 1300. 1996.
PB - PUBLISHER: American Association of Petroleum Geologists. Tulsa, OK, United States. 1996.
CP - COUNTRY OF PUBLICATION: United-States
PY - PUBLICATION YEAR: 1996
CN - CONFERENCE INFORMATION: AAPG international conference and exhibition. Caracas, Venezuela. Sept. 8-11, 1996.
LA - LANGUAGE: English
AB - ABSTRACT: The discovery of the Cusiana field in 1992 followed 30 years of exploration in the Llanos fold and thrustbelt of Colombia. Early exploration activity focusssed on large surface anticlines that were all fresh water flushed--a consequence of along strike exposure of the reservoir rocks. The potential for deeper, sub thrust, trapping geometries was recognised in the early 1970s however exploration at the time was hindered by very poor quality seismic data and significant drilling difficulties. The 1980s exploration effort was characterised by continued poor quality seismic data and drilling difficulties combined with a geological perception that there was no effective reservoir and the majority of the structures post dated the major period of hydrocarbon generation and migration. The Cusiana discovery with a gross hydrocarbon column in excess of 1500' reservoired within the Mirador (Eocene), Barco (Palaeocene) and Guadalupe (Upper Cretaceous) Formations in a large thrust anticline demonstrated the presence of a working hydrocarbon system. Subsequent exploration of the trend to the north has resulted in the discovery of four further giant oil and gas fields, Cupiagua (500 MMBBLs, 1-2 tcf) and the Florena/Pauto/Volcanera complex with estimated reserves of 1 billion barrels and 10 tcf. Key to this success has been the seismic imaging of the trapping geometries resulting from a significant improvement in the quality of the seismic data--a consequence of improvements in both acquisition and processing technology, combined with a recognition that pure quartz arenites retain reservoir quality at significant depths of burial--and that despite original depths of burial of greater than 18,000 ft reservoir quality was not a major risk for further exploration success.
DE - DESCRIPTORS: anticlines-; arenite-; Barco-Formation; Cenozoic-; clastic-rocks; Colombia-; Cretaceous-; Cusiana-Field; Cusiana-Trend; drilling-; Eocene-; faults-; Florena-Pauto-Volcanera-Complex; fold-and-thrust-belts; folds-; genesis-; geometry-; geophysical-methods; geophysical-surveys; giant-fields; Guadalupe-Formation; history-; Llanos-; Mesozoic-; migration-; Mirador-Formation; natural-gas; oil-and-gas-fields; Paleocene-; Paleogene-; petroleum-; petroleum-exploration; quartz-arenite; reservoir-rocks; sedimentary-rocks; seismic-methods; South-America; strike-; structural-traps; surveys-; Tertiary-; thrust-faults; traps-; Upper-Cretaceous
CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources
DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document
BL - BIB LEVEL: Analytic
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States
IS - ISSN: 0149-1423
CO - CODEN: AABUD2
AN - ACCESSION NUMBER: 1996-072063
UD - UPDATE CODE: 199622
Registro 4648 de 5614 - GeoRef Disc 4: 1993-1996
TI - TITLE: The hydrocarbon habitat of northern South America; Colombia-Venezuela-Trinidad.
AU - AUTHORS: James-Keith-H
AF - AUTHOR AFFILIATION: Conoco, Houston, TX, United States
BK - BOOK TITLE: In: AAPG international conference and exhibition; abstracts.
BA - BOOK AUTHORS: Anonymous
SO - SOURCE: AAPG Bulletin. 80; 8, Pages 1303. 1996.
PB - PUBLISHER: American Association of Petroleum Geologists. Tulsa, OK, United States. 1996.
CP - COUNTRY OF PUBLICATION: United-States
PY - PUBLICATION YEAR: 1996
CN - CONFERENCE INFORMATION: AAPG international conference and exhibition. Caracas, Venezuela. Sept. 8-11, 1996.
LA - LANGUAGE: English
AB - ABSTRACT: A prolific hydrocarbon province extends across the northern margin of South America from Colombia to east of Trinidad. Two key components are a world-class source rock, formed on a regional Late Cretaceous passive margin, and a complex tectonic setting in which a variety of structural and stratigraphic traps, reservoirs, seals and hydrocarbon kitchens have evolved through time. Convergence between the Farallon and Caribbean plates with South America culminated in the late Cretaceous-early Palaeogene with emplacement of Colombia's Central Cordillera in the west and a nappe-foreland basin system in the north. Regional hydrocarbon generation probably occurred below associated basins. Subsequent oblique convergence between the Caribbean and South America, partitioned into strike-slip and compressional strain, generated an eastward migrating and ongoing uplift-foredeep (kitchen) system from central Venezuela to Trinidad. Similarly, oblique interaction of western Colombia with the Nazca Plate caused segmentation of the earlier orogen, northward extrusion of elements such as the Maracaibo Block, and eastward migration of uplift progressively dividing earlier kitchens into localized foredeeps.
DE - DESCRIPTORS: Antilles-; basins-; Caribbean-Plate; Caribbean-region; Central-Cordillera; Colombia-; compression-tectonics; Cretaceous-; evolution-; Farallon-Plate; faults-; foreland-basins; genesis-; Lesser-Antilles; Maracaibo-Block; Mesozoic-; nappes-; Nazca-Plate; northern-South-America; passive-margins; petroleum-; plate-convergence; plate-tectonics; source-rocks; South-America; strain-; stratigraphic-traps; strike-slip-faults; structural-traps; tectonics-; traps-; Trinidad-; Trinidad-and-Tobago; uplifts-; Upper-Cretaceous; Venezuela-; West-Indies
CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources
DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document
BL - BIB LEVEL: Analytic
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States
IS - ISSN: 0149-1423
CO - CODEN: AABUD2
AN - ACCESSION NUMBER: 1996-072076
UD - UPDATE CODE: 199622
Registro 4649 de 5614 - GeoRef Disc 4: 1993-1996
TI - TITLE: Modeling paleobathymetric and relative sea level curves from palynofacies analysis and palynomorphs paleoecology.
AU - AUTHORS: Jaramillo-Carlos; Yepes-Oscar; Oboh-Franca
AF - AUTHOR AFFILIATION: University of Florida, Florida Museum of Natural History, Gainesville, FL, United States
BK - BOOK TITLE: In: AAPG international conference and exhibition; abstracts.
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