No. Registros Solicitud 1 5614 colombia

CC - CATEGORY CODES: 16-Structural-geology; 20-Applied-geophysics

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: 0094-0038

CO - CODEN: APGAB2

AN - ACCESSION NUMBER: 1997-017606

UD - UPDATE CODE: 199706

Registro 4695 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Cusiana Trend exploration, Llanos foothills thrustbelt, Colombia; the opening of a new hydrocarbon province.

AU - AUTHORS: O-Leary-John; Hayward-Tony; Addison-Fergus; Espinosa-German

AF - AUTHOR AFFILIATION: BP Exploration, Bogota, Colombia

BK - BOOK TITLE: In: American Association of Petroleum Geologists 1996 annual convention.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Annual Meeting Abstracts - American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. 5; Pages 108. 1996.

PB - PUBLISHER: American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. Tulsa, OK, United States. 1996.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1996

CN - CONFERENCE INFORMATION: American Association of Petroleum Geologists 1996 annual convention. San Diego, CA, United States. May 19-22, 1996.

LA - LANGUAGE: English

AB - ABSTRACT: The Llanos foothills petroleum trend of the Eastern Cordillera in Colombia containing the giant Cusiana Field has proven to be one of the most exciting hydrocarbon provinces discovered in recent years. The Llanos foothills trend is a fold and thrust belt with cumulative discovered reserves to date of nearly 6 billion barrels of oil equivalent. This paper summarises the critical exploration techniques used in unlocking the potential of this major petroleum system. The first phase of exploration in the Llanos foothills lasted from the early 1960s to the mid 70s. Several large structures defined by surface geology and seismic data were drilled. Although no major discoveries were made, evidence of a petroleum play was found. The seismic imaging and drilling technology combined with the geological understanding which was then available did not allow the full potential of the trend to be realised. In the late 1980s better data and a revised geological perception of the trend led BP, Triton and Total into active exploration, which resulted in the discovery of the Cusiana Field. The subsequent discovery of the Cupiagua, Volcanera, Florena and Pauto Sur fields confirmed the trend as a major hydrocarbon province. The exploration programme has used a series of geological and geophysical practices and techniques which have allowed the successful exploitation of the trend. The critical success factor has been the correct application of technology in seismic acquisition and processing and drilling techniques.

DE - DESCRIPTORS: Andes-; applications-; Colombia-; Cupiagua-Field; Cusiana-Field; Cusiana-Trend; data-acquisition; drilling-; Eastern-Cordillera; exploitation-; Florena-Field; fold-and-thrust-belts; geophysical-methods; geophysical-surveys; history-; Llanos-; oil-and-gas-fields; Pauto-Sur-Field; petroleum-; petroleum-exploration; reserves-; seismic-methods; South-America; surveys-; technology-; Volcanera-Field

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: 0094-0038

CO - CODEN: APGAB2

AN - ACCESSION NUMBER: 1997-017618

UD - UPDATE CODE: 199706

Registro 4696 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Using GIS technology to integrate remote sensing and field work data with templates.

AU - AUTHORS: Perez-G; Ellis-J-M; Davis-H-H

AF - AUTHOR AFFILIATION: Chevron Petroleum Company of Colombia, Bogota, Colombia

BK - BOOK TITLE: In: American Association of Petroleum Geologists 1996 annual convention.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Annual Meeting Abstracts - American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. 5; Pages 111. 1996.

PB - PUBLISHER: American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. Tulsa, OK, United States. 1996.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1996

CN - CONFERENCE INFORMATION: American Association of Petroleum Geologists 1996 annual convention. San Diego, CA, United States. May 19-22, 1996.

LA - LANGUAGE: English

AB - ABSTRACT: Field work for major projects is becoming more dependent upon contractors who have a variety of training, experience and methodology. Contractor gaps in data collected, inconsistent methodology and terminology, and out-of-context observations are minimized by using digital templates and remote sensing support. The digital templates utilize off-the-shelf PC software and portable hardware. Some field data can be customized to easily correlate with well logs utilizing computer-aided drafting (CAD) technology. Processed satellite images are georeferenced to a specific map projection, utilizing ground control points determined with Global Positioning System (GPS). Geographical information system (GIS) technology is being evaluated as an integration tool to make complex tables of field data, CAD base maps, interpretation maps, and images more useful to earth scientists. The GIS enables users to: - examine their field data, maps, and images in a PC-based environment; - better understand spatial relationships between field observations, images and geologic maps; - interactively query field data while viewing associated images and maps; - ultimately improve database usage, database quality, and geological interpretations. The geologic interpretation of georeferenced images and field work in the Rio du Blanco license of Colombia resulted in (1) an improved geologic map with better definition of source-reservoir rock from the hangingwall to the footwall of the main thrust and (2) better surface controlled balanced crossed-sections that led to play definition and to improve seismic planning/field parameters design for refining seismic acquisition.

DE - DESCRIPTORS: balanced-cross-sections; CAD-; cross-sections; data-acquisition; data-processing; faults-; foot-wall; geographic-information-systems; Global-Positioning-System; hanging-wall; information-systems; interpretation-; remote-sensing; technology-; thrust-faults

CC - CATEGORY CODES: 20-Applied-geophysics

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: 0094-0038

CO - CODEN: APGAB2

AN - ACCESSION NUMBER: 1997-017634

UD - UPDATE CODE: 199706

Registro 4697 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Reservoir performance of late Eocene incised valley fills, Cusiana Field, Llanos foothills, eastern Colombia.

AU - AUTHORS: Pulham-Andy; Warren-Edward; App-Jeff

AF - AUTHOR AFFILIATION: University of Colorado, Boulder, CO, United States

BK - BOOK TITLE: In: American Association of Petroleum Geologists 1996 annual convention.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Annual Meeting Abstracts - American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. 5; Pages 115-116. 1996.

PB - PUBLISHER: American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. Tulsa, OK, United States. 1996.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1996

CN - CONFERENCE INFORMATION: American Association of Petroleum Geologists 1996 annual convention. San Diego, CA, United States. May 19-22, 1996.

LA - LANGUAGE: English

AB - ABSTRACT: The Cusiana Field is located in the Llanos foothills of eastern Colombia. The principal reservoir is the late Eocene Mirador Formation which comprises >50% of reserves. Currently (September 1995) the Mirador reservoir is providing nearly all of the 150,000 bopd of production from the Cusiana Field. The Mirador reservoir comprises a stack of incised valley deposits. The fills of the valleys are dominated by quartz arenite sandstones. The average porosity of the valley sandstones is 8% which reflects abundant quartz cement ( approximately 14%) and significant compaction during deep burial ( approximately 20,000 ft). Single valleys are up to 70 ft thick and exhibit a distinctive bipartite fill that reflects changing energy conditions during filling. Bases of valleys have the coarsest grain size and have sedimentological and trace fossil evidence for deposition in highly stressed, brackish water environments. The upper parts of the valleys are typically finer grained and were deposited in more saline settings. Despite the low porosity of the Mirador valleys, drill stem tests and production log data show that they have phenomenal performance characteristics. Rates of > or =10,000bopd are achieved from single valleys. Bases of the valley fills are the key contributors to flow. Integration of detailed core and pore system analysis with the reservoir performance data shows that the permeability fabric of the Mirador can be explained by original depositional architecture and simple loss of primary porosity. Comparison of Cusiana with other quartz-rich sandstones from around the world suggests that its low porosity/high performance is predictable.

DE - DESCRIPTORS: arenite-; brackish-water-environment; Cenozoic-; clastic-rocks; Colombia-; compaction-; cores-; Cusiana-Field; depositional-environment; drill-stem-tests; eastern-Colombia; Eocene-; grain-size; Llanos-; Mirador-Formation; oil-and-gas-fields; Paleogene-; petroleum-; petroleum-engineering; porosity-; primary-porosity; production-; quartz-arenite; reserves-; reservoir-rocks; sandstone-; sedimentary-rocks; South-America; Tertiary-; upper-Eocene; well-logs

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: 0094-0038

CO - CODEN: APGAB2

AN - ACCESSION NUMBER: 1997-017658

UD - UPDATE CODE: 199706

Registro 4698 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Modeling high resolution sequence stratigraphy in the Cusiana Field, eastern Colombia; static builds to dynamic simulation.

AU - AUTHORS: Pulham-Andy; MacDonald-David; Daly-Colin

AF - AUTHOR AFFILIATION: University of Colorado, Boulder, CO, United States

BK - BOOK TITLE: In: American Association of Petroleum Geologists 1996 annual convention.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Annual Meeting Abstracts - American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. 5; Pages 116. 1996.

PB - PUBLISHER: American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. Tulsa, OK, United States. 1996.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1996

CN - CONFERENCE INFORMATION: American Association of Petroleum Geologists 1996 annual convention. San Diego, CA, United States. May 19-22, 1996.

LA - LANGUAGE: English

AB - ABSTRACT: The Cusiana Field (BP, Ecopetrol, Total and Triton) is located in the Llanos foothills of eastern Colombia. The Cusiana reservoirs range from Late Cretaceous, passive margin deltaic to early Tertiary, early foreland basin estuarine-fluvial. The key reservoir is the late Eocene Mirador Formation which comprises over 50% of reserves. Currently (October 1995) the Mirador reservoir is providing nearly all of the 180,000 bopd of production from the Cusiana Field. The Mirador reservoir comprises a stack of incised valley deposits. The fills of the valleys are sandstone-dominated and comprise the majority of the reservoir quality in the reservoir. Critical to an effective understanding of reservoir behavior has been a detailed reservoir description and reservoir modeling of the incised valley stratigraphy in the Mirador. Models have been constructed using the deterministic information provided by extensive core (3000 feet) coupled with stochastic tools and techniques. Dynamic data, provided by extensive acquisition of production logs during early development drilling, have been integrated within the static descriptions. Important reservoir characteristics such as degree of valley connectivity, intra-valley heterogeneities and textural controls on permeability have been captured in the modeling process. Upscaling of the high resolution static model has preserved the key sequence stratigraphic facets of the reservoir and also incorporated textural controls on relative permeability. Prediction of pressure transient behavior and fluid movement is working well in the full field simulator. Key software in the modeling and visualization process have been internal BP R&D tools, Stratamodel, Geomatic and in the full field simulator; VIP.

DE - DESCRIPTORS: basins-; Cenozoic-; clastic-rocks; Colombia-; computer-programs; connectivity-; Cretaceous-; Cusiana-Field; data-processing; depositional-environment; eastern-Colombia; Eocene-; estuarine-environment; fluvial-environment; foreland-basins; heterogeneity-; high-resolution-methods; Llanos-; lower-Tertiary; Mesozoic-; Mirador-Formation; models-; oil-and-gas-fields; Paleogene-; permeability-; petroleum-; petroleum-engineering; production-; reserves-; reservoir-properties; reservoir-rocks; sandstone-; sedimentary-rocks; sequence-stratigraphy; simulation-; South-America; Tertiary-; textures-; Upper-Cretaceous; visualization-; well-logs

CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources; 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: 0094-0038

CO - CODEN: APGAB2

AN - ACCESSION NUMBER: 1997-017659

UD - UPDATE CODE: 199706

Registro 4699 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Oil geochemistry of the northern Llanos Basin, Colombia; a model for migration.

AU - AUTHORS: Ramon-Juan-C; Dzou-Leon

AF - AUTHOR AFFILIATION: Colorado School of Mines, Golden, CO, United States

BK - BOOK TITLE: In: American Association of Petroleum Geologists 1996 annual convention.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Annual Meeting Abstracts - American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. 5; Pages 117-118. 1996.

PB - PUBLISHER: American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. Tulsa, OK, United States. 1996.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1996

CN - CONFERENCE INFORMATION: American Association of Petroleum Geologists 1996 annual convention. San Diego, CA, United States. May 19-22, 1996.

LA - LANGUAGE: English

AB - ABSTRACT: The chemical composition of 23 crude oils and one oil seep from Llanos Basin, Colombia were studied in detail by geochemical methods in order to understand their genetic relationship. A filling history model is proposed to explain the observed composition variations in Llanos Basin oils. Geochemical fingerprinting indicates that there are six families of crude oils. The biomarker compositions have been used to identify characteristics of the source rocks. The Llanos oils contain marine algal-derived "C30 steranes" (i.e., 24-n-propylcholestanes), which are diagnostic for oils generated from marine Cretaceous source rocks. A significant HC-contribution from a Tertiary source is also indicated by the presence of high concentration of the "flowering plant"-markers oleanane, bicadinanes and oleanoids. Low DBT/Phen, %sulfur values and high diasteranes concentration indicate that the source rock is clay-rich. Biomarker maturity parameters indicate a wide range of source-rock thermal maturities from early to late oil window. Heavy biodegradation has been particularly common among the first oils to fill reservoirs in central Llanos basin oil fields. The older altered heavy oils were mixed with a second pulse of oil explaining the wide range of oil gravities measured in the central Llanos Basin.

DE - DESCRIPTORS: alteration-; bicadinanes-; biodegradation-; biomarkers-; Cenozoic-; chemical-composition; Colombia-; composition-; Cretaceous-; crude-oil; genesis-; geochemistry-; hydrocarbons-; Llanos-; maturity-; Mesozoic-; migration-; models-; oil-seeps; oleanane-; oleanoids-; organic-compounds; organic-materials; petroleum-; reservoir-rocks; source-rocks; South-America; steranes-; Tertiary-; thermal-maturity; variations-

CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources; 02C-Geochemistry-of-rocks,-soils,-and-sediments

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: 0094-0038

CO - CODEN: APGAB2

AN - ACCESSION NUMBER: 1997-017671

UD - UPDATE CODE: 199706

Registro 4700 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Stratigraphic controls on the source rock distribution, Llanos Orientales Basin, Colombia.

AU - AUTHORS: Ramon-Juan-C; Fajardo-Andres-A; Rubiano-Jorge; Reyes-Andres

AF - AUTHOR AFFILIATION: Ecopetrol, Instituto Colombiano del Petroleo, COL, Colombia

BK - BOOK TITLE: In: American Association of Petroleum Geologists 1996 annual convention.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Annual Meeting Abstracts - American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. 5; Pages 118. 1996.

PB - PUBLISHER: American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. Tulsa, OK, United States. 1996.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1996

CN - CONFERENCE INFORMATION: American Association of Petroleum Geologists 1996 annual convention. San Diego, CA, United States. May 19-22, 1996.

LA - LANGUAGE: English

AB - ABSTRACT: All available rock and oil geochemistry analyses were tied to a high-resolution stratigraphic framework for more than 50 wells in the central Llanos Orientales Basin. New Tertiary generation input 15 proposed. The best source rock intervals are at the base and top of the Gacheta Formation (Upper Cretaceous) and in the middle of the Barco-Cuervos (Paleocene) and Mirador (Eocene) formations. These organic-rich zones contain type II and III kerogen. TOC contents range from about 1% up to 15%. The four source rock intervals occur within marine shales near condensed sections, at the position maximum accommodation/sediment-supply (A/S) ratios. The development of conditions that allow accumulation and preservation of anomalously high fractions of organic matter might be explained by two mechanisms. Increased A/S ratio results in retention of more sediment in the coastal plain, thus reducing the tendency for siliciclastic sediment to dilute the organic matter accumulating on the shelf. Also, deeper water might restrict circulation, enhancing bottom anoxic conditions. In the more transitional and continental sequences, increased A/S ratio is associated with higher phreatic water level. A high ground water table enhances preservation of coaly intervals. The sea-level rise brings marine water into valleys and low-gradient coastal plains. The resulting embayments, marsh and swampy areas are organic-prone, contributing to the source rock potential of strata associated with high S/A conditions and base-level rise-to-fall turnaround positions.

DE - DESCRIPTORS: anaerobic-environment; Barco-Cuervos-Formation; carbon-; Cenozoic-; clastic-rocks; clastic-sediments; Colombia-; Cretaceous-; distribution-; Eocene-; Gacheta-Formation; genesis-; ground-water; kerogen-; levels-; Llanos-; marine-environment; Mesozoic-; Mirador-Formation; organic-carbon; organic-compounds; organic-materials; Paleocene-; Paleogene-; petroleum-; sea-water; sediment-supply; sedimentary-rocks; sediments-; shale-; siliciclastics-; source-rocks; South-America; Tertiary-; Upper-Cretaceous; water-table; wells-

CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources; 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: 0094-0038

CO - CODEN: APGAB2

AN - ACCESSION NUMBER: 1997-017672

UD - UPDATE CODE: 199706

Registro 4701 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Exploration for stratigraphic traps in a foreland basin using a sequence stratigraphic simulation; examples from the Eocene/ Oligocene of the Apure-Llanos Basin, Venezuela.

AU - AUTHORS: Reistroffer-John; Levine-Phillip-A; Kendall-Christopher-G-St-C; Finno-Anahy

AF - AUTHOR AFFILIATION: University of South Carolina, Columbia, SC, United States

BK - BOOK TITLE: In: American Association of Petroleum Geologists 1996 annual convention.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Annual Meeting Abstracts - American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. 5; Pages 119. 1996.

PB - PUBLISHER: American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. Tulsa, OK, United States. 1996.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1996

CN - CONFERENCE INFORMATION: American Association of Petroleum Geologists 1996 annual convention. San Diego, CA, United States. May 19-22, 1996.

LA - LANGUAGE: English

AB - ABSTRACT: Foreland basin depositional sequences provide a sensitive record of the interaction between tectonism, eustatic sea level fluctuations, and sedimentation rates. Interplay between these controlling factors creates sedimentary geometries which are unique to this tectonic setting and form excellent stratigraphic hydrocarbon traps. Incised valley fill deposits, "forced regression" deposits, and combination structure-stratigraphic traps are the predominant reservoir types. In an effort to extend our understanding of the development of these traps, the sequence stratigraphy of a regional seismic transect through the Apure-Llanos Basin was simulated. From the late Eocene through Oligocene, the Apure-Llanos basin was characterized by multiple phases of compression and a southeast migrating depocenter. Sands of the Mirador and Carbonera formations, which onlap the Arauca Arch to the southeast, were shed from the Guyana Craton and were cannibalized from sediments along the deformation front to the northwest. These sands comprise the principal reservoirs in the study area. Shales of the Leon Formation, which act as a regional seal, were deposited during rapid flexural subsidence and eustatic sea level rise during the early Oligocene. The Arauca Arch acted as a focal mechanism for east and southeast migrating hydrocarbons. Simulation results predict an important stratigraphic pinchout of the Mirador Formation sands against the Arauca Arch, which correlates with the Arauca Field in Colombia to the southwest. Also, modeling indicates that minimal Tertiary oil production in the La Victoria Field to the east is due to the lack of an adequate seal. Our results provide a conceptual model which predicts hydrocarbon reservoir and seal relationships in a foreland basin setting with limited data control.