No. Registros Solicitud 1 5614 colombia
Yüklə 20,82 Mb.
|
|
CC - CATEGORY CODES: 30-Engineering-geology DT - DOCUMENT TYPE: Serial; Conference-Document BL - BIB LEVEL: Analytic IL - ILLUSTRATION: Refs: 9; illus. incl. 4 tables. RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. CO - CODEN: #01720 AN - ACCESSION NUMBER: 1995-058381 UD - UPDATE CODE: 199521 Registro 4969 de 5614 - GeoRef Disc 4: 1993-1996 TI - TITLE: Geological hazard and risk evaluation using GIS; methodology and model applied to Medellin, Colombia. AU - AUTHORS: Mejia-Navarro-Mario; Wohl-Ellen-E AF - AUTHOR AFFILIATION: Colorado State University, Department of Earth Resources, Fort Collins, CO, United States SO - SOURCE: Bulletin of the Association of Engineering Geologists. 31; 4, Pages 459-481. 1994. PB - PUBLISHER: Association of Engineering Geologists. Dallas, TX, United States. 1994. CP - COUNTRY OF PUBLICATION: United-States PY - PUBLICATION YEAR: 1994 LA - LANGUAGE: English DE - DESCRIPTORS: computer-programs; data-processing; erosion-; geographic-information-systems; geologic-hazards; GRASS-; information-systems; land-use; landslides-; mass-movements; Medellin-Colombia; models-; slope-stability CC - CATEGORY CODES: 30-Engineering-geology DT - DOCUMENT TYPE: Serial BL - BIB LEVEL: Analytic IL - ILLUSTRATION: Refs: 41; 3 tables, sketch maps. RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. IS - ISSN: 0004-5691 CO - CODEN: ENGEA9 AN - ACCESSION NUMBER: 1995-060550 UD - UPDATE CODE: 199521 Registro 4970 de 5614 - GeoRef Disc 4: 1993-1996 TI - TITLE: Relation of unit gravel discharge to mean velocity. AU - AUTHORS: Posada-G-Lilian; Nordin-Carl-F Jr. AF - AUTHOR AFFILIATION: Universidad Nacional de Colombia, Civil Engineering, Medellin, Colombia BK - BOOK TITLE: In: Hydraulic engineering '94. BA - BOOK AUTHORS: Cotroneo-George-V (editor); Rumer-Ralph-R (editor) SO - SOURCE: Hydraulic Engineering: Proceedings of the National Conference on Hydraulic Engineering. 1994; Pages 1050-1054. 1994. PB - PUBLISHER: American Society of Civil Engineers. Hydraulics Division. New York, NY, United States. 1994. CP - COUNTRY OF PUBLICATION: United-States PY - PUBLICATION YEAR: 1994 CN - CONFERENCE INFORMATION: 1994 ASCE national conference on Hydraulic engineering. Buffalo, NY, United States. Aug. 1-5, 1994. LA - LANGUAGE: English DE - DESCRIPTORS: clastic-sediments; discharge-; fluvial-features; gravel-; hydrodynamics-; sand-; sediment-transport; sediments-; stream-transport; streams-; velocity- CC - CATEGORY CODES: 21-Hydrogeology DT - DOCUMENT TYPE: Serial; Conference-Document BL - BIB LEVEL: Analytic IL - ILLUSTRATION: Refs: 10; illus. RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. IS - ISSN: 1070-1559 IB - ISBN: 0-7844-0037-7 AN - ACCESSION NUMBER: 1995-061079 UD - UPDATE CODE: 199521 Registro 4971 de 5614 - GeoRef Disc 4: 1993-1996 TI - TITLE: Teleseismic analysis of the Great 1994 Bolivia earthquake. AU - AUTHORS: Ekstrom-Goran AF - AUTHOR AFFILIATION: Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States BK - BOOK TITLE: In: AGU 1994 fall meeting. BA - BOOK AUTHORS: Anonymous SO - SOURCE: Eos, Transactions, American Geophysical Union. 75; 44, Suppl., Pages 465. 1994. PB - PUBLISHER: American Geophysical Union. Washington, DC, United States. 1994. CP - COUNTRY OF PUBLICATION: United-States PY - PUBLICATION YEAR: 1994 CN - CONFERENCE INFORMATION: American Geophysical Union, 1994 fall meeting. San Francisco, CA, United States. Dec 5-9, 1994. LA - LANGUAGE: English DE - DESCRIPTORS: body-waves; Bolivia-; Bolivia-earthquake-1994; Colombia-earthquake-1970; deep-focus-earthquakes; earthquakes-; elastic-waves; long-period-waves; mantle-; mapping-; numerical-analysis; P-waves; rupture-; seismic-moment; seismic-waves; seismograms-; South-America; teleseismic-signals; time-factor CC - CATEGORY CODES: 19-Seismology DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document BL - BIB LEVEL: Analytic RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. IS - ISSN: 0096-3941 CO - CODEN: EOSTAJ AN - ACCESSION NUMBER: 1995-065072 UD - UPDATE CODE: 199523 Registro 4972 de 5614 - GeoRef Disc 4: 1993-1996 TI - TITLE: Modelling spatial variations of soil compaction in the Guaviare colonization area, Colombian Amazonia. AU - AUTHORS: Martinez-M-Luis-Joel; Zinck-J-Alfred AF - AUTHOR AFFILIATION: ITC, Tropenbos-Colombia Programme, Santafe de Bogota, Colombia BK - BOOK TITLE: In: Special GIS issue; Latin America. BA - BOOK AUTHORS: Valenzuela-Carlos-R (editor) SO - SOURCE: ITC Journal = Bulletin de l'ITC. 1994-3; Pages 252-263. 1994. PB - PUBLISHER: International Institute for Aerial Survey and Earth Sciences. Enschede, Netherlands. 1994. CP - COUNTRY OF PUBLICATION: Netherlands PY - PUBLICATION YEAR: 1994 LA - LANGUAGE: English LS - LANGUAGE OF SUMMARY: French; Spanish DE - DESCRIPTORS: Amazon-Basin; Colombia-; compaction-; deforestation-; degradation-; drainage-; erosion-; forests-; Guaviare-colonization-area; human-activity; landform-evolution; models-; physical-properties; soils-; South-America; spatial-variations; statistical-analysis; tropical-environment; variance-analysis; variograms-; vegetation- CC - CATEGORY CODES: 25-Soils DT - DOCUMENT TYPE: Serial BL - BIB LEVEL: Analytic IL - ILLUSTRATION: Refs: 36; illus. incl. 1 table, sketch map. RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. IS - ISSN: 0303-2434 AN - ACCESSION NUMBER: 1995-065161 UD - UPDATE CODE: 199523 Registro 4973 de 5614 - GeoRef Disc 4: 1993-1996 TI - TITLE: Evaluating the use of training areas in bivariate statistical landslide hazard analysis; a case study in Colombia. AU - AUTHORS: Naranjo-Jose-Luis; van-Westen-Cees-J; Soeters-Robert AF - AUTHOR AFFILIATION: Universidad de Caldas, Facultad de Geologia y Minas, Manizales, Colombia BK - BOOK TITLE: In: Special GIS issue; Latin America. BA - BOOK AUTHORS: Valenzuela-Carlos-R (editor) SO - SOURCE: ITC Journal = Bulletin de l'ITC. 1994-3; Pages 292-300. 1994. PB - PUBLISHER: International Institute for Aerial Survey and Earth Sciences. Enschede, Netherlands. 1994. CP - COUNTRY OF PUBLICATION: Netherlands PY - PUBLICATION YEAR: 1994 LA - LANGUAGE: English LS - LANGUAGE OF SUMMARY: French; Spanish DE - DESCRIPTORS: accuracy-; Andes-; bivariate-analysis; Caldas-Colombia; Chinchina-Colombia; Colombia-; erosion-features; geologic-hazards; landform-evolution; landslides-; mass-movements; methods-; prediction-; Risaralda-Colombia; risk-assessment; Santa-Rosa-Colombia; South-America; spatial-distribution; statistical-analysis CC - CATEGORY CODES: 22-Environmental-geology DT - DOCUMENT TYPE: Serial BL - BIB LEVEL: Analytic IL - ILLUSTRATION: Refs: 8; illus. incl. block diags., 4 tables, sketch map. RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. IS - ISSN: 0303-2434 AN - ACCESSION NUMBER: 1995-065164 UD - UPDATE CODE: 199523 Registro 4974 de 5614 - GeoRef Disc 4: 1993-1996 BK - BOOK TITLE: Comparative planktonic foraminiferal biostratigraphy of the Colombia Basin and Northeast Gulf of Mexico. BA - BOOK AUTHORS: Fletcher-Ruth-Reilly RP - RESEARCH PROGRAM: DSDP (Deep Sea Drilling Project | ODP (Ocean Drilling Program) CP - COUNTRY OF PUBLICATION: United-States PY - PUBLICATION YEAR: 1994 DG - DEGREE GRANTED: Doctoral DI - DEGREE GRANTING INSTITUTION: University of Delaware. Newark, DE, United States. Pages: 639. 1994. LA - LANGUAGE: English DE - DESCRIPTORS: Atlantic-Ocean; biostratigraphy-; Caribbean-Sea; Cenozoic-; Central-America; coiling-; Colombian-Basin; correlation-; Deep-Sea-Drilling-Project; DSDP-Site-502; Foraminifera-; Gulf-of-Mexico; Invertebrata-; IPOD-; Leg-100; Leg-68; microfossils-; Neogene-; North-Atlantic; northeastern-Gulf-of-Mexico; Ocean-Drilling-Program; ODP-Site-625; Pacific-Ocean; paleo-oceanography; paleomagnetism-; paleosalinity-; Panama-; planktonic-taxa; Pliocene-; Protista-; sea-water; sedimentation-rates; Tertiary- CC - CATEGORY CODES: 12-Stratigraphy DT - DOCUMENT TYPE: Thesis-or-Dissertation BL - BIB LEVEL: Monograph NN - ANNOTATION: In two volumes. RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. AV - AVAILABILITY: University Microfilms, Ann Arbor, MI, United States AN - ACCESSION NUMBER: 1996-001598 UD - UPDATE CODE: 199601 Registro 4975 de 5614 - GeoRef Disc 4: 1993-1996 TI - TITLE: VSPs in complex structures in Colombia. AU - AUTHORS: Knight-Jonathan; Burke-Nick; Begg-Paul AF - AUTHOR AFFILIATION: Schlumberger GeoQuest, Bogota, Colombia BK - BOOK TITLE: In: Society of Exploration Geophysicists, 64th annual international meeting; technical program, expanded abstracts with authors' biographies. BA - BOOK AUTHORS: Anonymous SO - SOURCE: SEG Annual Meeting Expanded Technical Program Abstracts with Biographies. 64; Pages 121-124. 1994. PB - PUBLISHER: Society of Exploration Geophysicists. Tulsa, OK, United States. 1994. CP - COUNTRY OF PUBLICATION: United-States PY - PUBLICATION YEAR: 1994 CN - CONFERENCE INFORMATION: Society of Exploration Geophysicists, 64th annual international meeting. Los Angeles, CA, United States. Oct. 23-28, 1994. LA - LANGUAGE: English AB - ABSTRACT: Vertical Seismic Profiles (VSP's) are used to provide high resolution images around deviated wells in complex geology in Colombia. The VSP images resolve faults and dipping reflectors. Key reflectors below a major reverse fault system, at depths in excess of 12,000 feet can be correlated unambiguously with the conventional 2D seismic data. VSP's also show reflections below the well which are used to establish correlation of the target reflector with the conventional seismic. Where there are no logs, the VSP provides a way to check the depth prognosis. Key markers are tracked across logs to the VSP with the same depth index. On a workstation the VSP images are compared with the surface seismic. Knowing the VSP phase and polarity, and the log correlation, can result in a refinement of the surface seismic interpretation. In some cases faults can be interpreted better on the higher resolution VSP, and the surface seismic interpretation can be refined simultaneously. Key markers below the fault zone appear deeper on the second VSP described than on the surface seismic. The patterns above and below the fault zone can be tied, but a shift is required between the two correlations, due to the difference in the estimates of velocity. Reconciling checkshot information alone with the surface seismic would have been difficult. Better resolution is achieved when migration of the VSP's is based on a simpler model of velocity than one based on the complex geology. In this tectonic setting, it is believed that the real velocity field is more related to current depth rather than strictly to the geological structure. DE - DESCRIPTORS: Andes-; Colombia-; faults-; geophysical-methods; geophysical-profiles; geophysical-surveys; Northern-Andes; oil-and-gas-fields; petroleum-; petroleum-exploration; reverse-faults; seismic-logging; seismic-methods; seismic-profiles; South-America; structural-traps; surveys-; thrust-faults; traps-; vertical-seismic-profiles; well-logging CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources; 20-Applied-geophysics DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document BL - BIB LEVEL: Analytic IL - ILLUSTRATION: illus. RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States IS - ISSN: 1052-3812 AN - ACCESSION NUMBER: 1996-004521 UD - UPDATE CODE: 199602 Registro 4976 de 5614 - GeoRef Disc 4: 1993-1996 TI - TITLE: Hazard appraisal and hazard-zone mapping of flooding and debris flowage in the Rio Combeima Valley and Ibague City, Tolima Department, Colombia. AU - AUTHORS: Thouret-Jean-Claude; Laforge-Christophe AF - AUTHOR AFFILIATION: Universite Blaise Pascal, CERAMAC, Clermont-Ferrand, France SO - SOURCE: GeoJournal. 34; 4, Pages 407-413. 1994. PB - PUBLISHER: Akademische Verlagsgesellschaft. Wiesbaden, Federal Republic of Germany. 1994. CP - COUNTRY OF PUBLICATION: Federal-Republic-of-Germany PY - PUBLICATION YEAR: 1994 LA - LANGUAGE: English DE - DESCRIPTORS: Colombia-; debris-flows; floods-; geologic-hazards; Ibague-Colombia; land-use; mapping-; mass-movements; planning-; Rio-Combeima; risk-assessment; South-America; Tolima-Colombia; volcanoes- CC - CATEGORY CODES: 22-Environmental-geology DT - DOCUMENT TYPE: Serial BL - BIB LEVEL: Analytic MC - MAP COORDINATES: LAT: N042000; N044000; LONG: W0755000; W0760000. IL - ILLUSTRATION: Refs: 6; illus. incl. 1 table, geol. sketch map. RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. IS - ISSN: 0343-2521 AN - ACCESSION NUMBER: 1996-008323 UD - UPDATE CODE: 199604 Registro 4977 de 5614 - GeoRef Disc 4: 1993-1996 TI - TITLE: Geochronology of basement uplifts in the Colombian Andes and evidence for terrane transfer from NW South America to southern Mexico in mid-Paleozoic time. AU - AUTHORS: Restrepo-Pace-P; Ruiz-J; Cosca-M AF - AUTHOR AFFILIATION: University of Arizona, Department of Geosciences, Tucson, AZ, United States BK - BOOK TITLE: In: AGU 1994 fall meeting. BA - BOOK AUTHORS: Anonymous SO - SOURCE: Eos, Transactions, American Geophysical Union. 75; 44, Suppl., Pages 199. 1994. PB - PUBLISHER: American Geophysical Union. Washington, DC, United States. 1994. CP - COUNTRY OF PUBLICATION: United-States PY - PUBLICATION YEAR: 1994 CN - CONFERENCE INFORMATION: American Geophysical Union, 1994 fall meeting. San Francisco, CA, United States. Dec. 5-9, 1994. LA - LANGUAGE: English DE - DESCRIPTORS: absolute-age; Acadian-Phase; Andes-; Ar-Ar; basement-tectonics; Colombia-; dates-; Devonian-; geochronology-; Grenvillian-Orogeny; K-Ar; Mexico-; middle-Paleozoic; Northern-Andes; orogenic-belts; paleogeography-; paleomagnetism-; Paleozoic-; Precambrian-; Rb-Sr; South-America; Taconic-Orogeny; tectonics-; terranes-; uplifts- CC - CATEGORY CODES: 03-Geochronology; 12-Stratigraphy; 16-Structural-geology DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document BL - BIB LEVEL: Analytic IL - ILLUSTRATION: Refs: 1 RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. IS - ISSN: 0096-3941 CO - CODEN: EOSTAJ AN - ACCESSION NUMBER: 1996-009413 UD - UPDATE CODE: 199604 Registro 4978 de 5614 - GeoRef Disc 4: 1993-1996 BK - BOOK TITLE: High-resolution stratigraphy, chronology and relative sea level of the Albian-Santonian (Cretaceous) of Colombia. BA - BOOK AUTHORS: Villamil-Tomas CP - COUNTRY OF PUBLICATION: United-States PY - PUBLICATION YEAR: 1994 DG - DEGREE GRANTED: Doctoral DI - DEGREE GRANTING INSTITUTION: University of Colorado. Boulder, CO, United States. Pages: 473. 1994. LA - LANGUAGE: English DE - DESCRIPTORS: Albian-; Ammonoidea-; biostratigraphy-; biozones-; Bivalvia-; Cephalopoda-; chronostratigraphy-; Colombia-; Cretaceous-; cycles-; Fischer-plots; Invertebrata-; lithofacies-; Lower-Cretaceous; Mesozoic-; Mollusca-; paleo-oceanography; plate-tectonics; regression-; Santonian-; sea-level-changes; sedimentation-rates; Senonian-; sequence-stratigraphy; South-America; statistical-analysis; stratigraphic-boundary; stratigraphy-; Tetrabranchiata-; thickness-; transgression-; Upper-Cretaceous; upwelling- CC - CATEGORY CODES: 12-Stratigraphy DT - DOCUMENT TYPE: Thesis-or-Dissertation BL - BIB LEVEL: Monograph RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. AV - AVAILABILITY: University Microfilms, Ann Arbor, MI, United States AN - ACCESSION NUMBER: 1996-011903 UD - UPDATE CODE: 199605 Registro 4979 de 5614 - GeoRef Disc 4: 1993-1996 TI - TITLE: 3-D seismic in mountainous terrain. AU - AUTHORS: Sixma-E; van-der-Schans-C AF - AUTHOR AFFILIATION: Shell Venezuela, Maracaibo, Venezuela BK - BOOK TITLE: In: Society of Exploration Geophysicists, 64th annual international meeting; technical program, expanded abstracts with authors' biographies. BA - BOOK AUTHORS: Anonymous SO - SOURCE: SEG Annual Meeting Expanded Technical Program Abstracts with Biographies. 64; Pages 1633-1636. 1994. PB - PUBLISHER: Society of Exploration Geophysicists. Tulsa, OK, United States. 1994. CP - COUNTRY OF PUBLICATION: United-States PY - PUBLICATION YEAR: 1994 CN - CONFERENCE INFORMATION: Society of Exploration Geophysicists, 64th annual international meeting. Los Angeles, CA, United States. Oct. 23-28, 1994. LA - LANGUAGE: English AB - ABSTRACT: In 1991/92 Shell Colombia successfully conducted two 3D seismic surveys in extremely difficult mountainous terrain and one in an urban area. Numerous cliffs of up to 400 m high and several rivers and canyons cross the first areas, whereas the work in urban area was performed in very poor neighborhoods. We consider work on slopes steeper than 50 degrees inherently unsafe. For urban work it is preferable to not have any cables on the roads. Therefore radio telemetric Opseis 5586 equipment was mobilized. This proved to be the right tool for the occasion, allowing safe and efficient operations, which with conventional cable telemetry would have been nearly impossible. Processing the data gave good to excellent results, proving that rough terrain as such is not an obstacle to producing high quality 3D seismic. A video, recorded during these operations will be shown at the congress and this article provides additional information about this unique experience. DE - DESCRIPTORS: Colombia-; data-acquisition; data-processing; geophysical-methods; geophysical-surveys; mountains-; petroleum-; petroleum-exploration; seismic-methods; slopes-; South-America; surveys-; terrains-; three-dimensional-models; urban-environment CC - CATEGORY CODES: 20-Applied-geophysics; 29A-Economic-geology,-geology-of-energy-sources DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document BL - BIB LEVEL: Analytic IL - ILLUSTRATION: illus. incl. sects., sketch map. RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States IS - ISSN: 1052-3812 AN - ACCESSION NUMBER: 1996-020645 UD - UPDATE CODE: 199608 Registro 4980 de 5614 - GeoRef Disc 4: 1993-1996 TI - TITLE: Advances in imaging in the Colombian foothills. AU - AUTHORS: Burke-N-L; Knapp-S AF - AUTHOR AFFILIATION: BP Exploration, Bogota, Colombia BK - BOOK TITLE: In: Society of Exploration Geophysicists, 64th annual international meeting; technical program, expanded abstracts with authors' biographies. BA - BOOK AUTHORS: Anonymous SO - SOURCE: SEG Annual Meeting Expanded Technical Program Abstracts with Biographies. 64; Pages 1651-1655. 1994. PB - PUBLISHER: Society of Exploration Geophysicists. Tulsa, OK, United States. 1994. CP - COUNTRY OF PUBLICATION: United-States PY - PUBLICATION YEAR: 1994 CN - CONFERENCE INFORMATION: Society of Exploration Geophysicists, 64th annual international meeting. Los Angeles, CA, United States. Oct. 23-28, 1994. LA - LANGUAGE: English AB - ABSTRACT: Exploring for hydrocarbons in thrust-belt areas is one of the great challenges for seismic imaging. The Llanos foothills of Colombia combine both difficult mountainous terrain and complex geology. Application of appropriate technology in both the acquisition and processing of the data has led to a risk reduction in the exploration phase of the trend and greater confidence in the reserve base in the exploitation phase. Early seismic data (pre 1991) show large anticlinal structures, but do not permit accurate subsurface prediction. A significant effort over the past three years using state of the art acquisition and processing imaging technology has resulted in substantial improvements in the quality of the seismic data. Standard processing techniques are used for stacking the data; the imaging strategy includes both post-stack and pre-stack time and depth migrations. However, integration between acquisition, processing and interpretation, as well as between BPX staff and its contractors, is key to improving the data quality. By reviewing the procedures on a line from the Cupiagua field discovered in 1992, the differences that the new imaging techniques have made will be shown. DE - DESCRIPTORS: Colombia-; Cusiana-Colombia; data-acquisition; data-processing; dip-moveout; faults-; forelands-; geophysical-methods; geophysical-surveys; imagery-; Llanos-; mountains-; petroleum-; petroleum-exploration; prestack-migration; seismic-methods; seismic-migration; South-America; stacking-; statics-; surveys-; terrains-; thrust-faults; wavelets- CC - CATEGORY CODES: 20-Applied-geophysics; 29A-Economic-geology,-geology-of-energy-sources DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document BL - BIB LEVEL: Analytic MC - MAP COORDINATES: LAT: N043000; N060000; LONG: W0723000; W0733000. IL - ILLUSTRATION: Refs: 1; 3 tables, sects., sketch map. RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States IS - ISSN: 1052-3812 AN - ACCESSION NUMBER: 1996-020651 UD - UPDATE CODE: 199608 Registro 4981 de 5614 - GeoRef Disc 4: 1993-1996 TI - TITLE: Processing of seismic data from overthrust areas in Latin America; some success stories. AU - AUTHORS: Mitchel-R-G; Tilander-N-G; Lattimore-R-K; Wuenscher-M-E; Ferguson-R-W AF - AUTHOR AFFILIATION: Chevron Overseas Petroleum, San Ramon, CA, United States BK - BOOK TITLE: In: Society of Exploration Geophysicists, 64th annual international meeting; technical program, expanded abstracts with authors' biographies. BA - BOOK AUTHORS: Anonymous SO - SOURCE: SEG Annual Meeting Expanded Technical Program Abstracts with Biographies. 64; Pages 1656-1657. 1994. PB - PUBLISHER: Society of Exploration Geophysicists. Tulsa, OK, United States. 1994. CP - COUNTRY OF PUBLICATION: United-States PY - PUBLICATION YEAR: 1994 CN - CONFERENCE INFORMATION: Society of Exploration Geophysicists, 64th annual international meeting. Los Angeles, CA, United States. Oct. 23-28, 1994. LA - LANGUAGE: English AB - ABSTRACT: Chevron has several years of experience with processing seismic data from the eastern Andes and other overthrust areas where data quality has ranged from fair to non-existent in the past. These are areas where topography is often severe, near-surface velocity and geology are highly variable, and operating conditions are difficult. Data acquisition is expensive and in many cases costs have not been justified. However, recent processing projects have given encouragement that better and more cost-effective data quality can be achieved. Better data quality is related to several factors;-Data acquisition parameters must be chosen properly and acquisition must be done according to plan.-Compensating for the effects of the near-surface on reflection travel times is very important and must be done correctly for good data quality.-The processing datum should involve a minimum bulk static shift and should be CDP-consistent.-Velocity analysis and residual statics need to be done in ways that maximize signal/noise; multiple iterations may be necessary.-Finally, shortcoming in any of the steps leads to inferior data quality; careful quality control and interpreter input must be emphasized. Yüklə 20,82 Mb. Dostları ilə paylaş:
|