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55th EAEG Meeting
- Conference date: 07 Jun 1993 - 11 Jun 1993
- Location: Stavanger, Norway
- ISBN: 978-94-6282-135-4
- Published: 08 June 1993
481 - 500 of 500 results
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A New approach to the study of sedimentary structures and fractures in reservoir
More LessThis new approach relies on two new tools designed by Elf. The first one, Galled "Autocar", provides unrolled photographs of the cores. The second one, Galled the "Diamage" workstation, is an integrated workstation which allows geometrical studies in the reservoirs based on both high-resolution tool images (FMS, FMI from Schlumberger) and unrolled photographs of the cores.
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Geostatistical reservoir characterization of the U. Clearfork Formation - Prentice Field
Authors O. V. Vejbaek and P. G. BeachPrentice field is a narrow stratigraphic trap of Permian age, formed by an updip porosity pinch out at a paleo shelf edge on the Northwest shelf of the Midland Basin, North Texas, U.S.A.. The reservoir section consists predominately of dolomitized mudstones, packstones and grainstones with abundant anhydrite, and a few intercalations of dolomite cemented silt store beds (< 5%). The facies grade from inter tidal to subtidal environments with high frequency fluctuations.
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The Nordkapp basin, Barents Sea - Basin development and halokinesis
Authors S. Nybakken and R. -A. BergThe Nordkapp Basin is a northeast-southwest trending structure in the Barents Sea 100 km north of the Norwegian coastline. Exploration activity with acquisition of seismic data started in the area in 1974 and especially the southwestern subbasin has a good data coverage. The first, production licences were awarded in the 11th concession round on the Norwegian shelf in 1987 and the first exploration well was drilled the same year. So far four production licences have been awarded along the margins of the basin. Five Wells have been drilled and four hydrocarbon accumulations discovered. However, none of these are commercial at present. For the 14th concession round blocks have been announced in the central part of this basin with exploration concepts related to salt diapirs.
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Areal variation of maximum temperatures and times of cooling on the Western Barents Shelf
By U. RitterMaximum temperatures have been obtained at about 25 locations on the Barents Shelf using sterare and hopane isomerisation at C-20 and C-22, vitrinite reflectance and Apatite Fission Track Analysis (AFTA). Isomerisation modelling employs tested and validated distributed kinetic models (Ritter et al., 1993a, in press), vitrinite reflectance temperaturen are derived from a slightly modified version of the model of Sweeney and Burnham (1990) and AFTA data have been determined using the method described by Greeen et al. (1989).
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Modellingof hydrocarbon generation in the Jameson Land Basin, East Greenland
Authors A. Mathiesen, E. G. Christiansen, T. Bidstrup, C. Marcussen, G. Dam, S. Piasecki and L. StemmerikThe Jameson Land basin in East Greenland comprises a stratigraphically almost complete and well exposed succession of Upper Palaeozoic - Mesozoic sediments. The composite thickness of the package is more than 17 km, with the lower approx. 13 km consisting of continental Glastics deposited during Middle Devonian - Early Permian rifting. In latest Palaeozoic and Mesozoic time, the basin was dominated by regional subsidence due to thermal contraction and more than 4 km of sediments accumulated. In the Tertiary, parts of the basin were covered by volcanics followed by considerable uplift in the order of 2-3 km.
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Jan Mayen Ridge - A frontier area for hydrocarbon exploration
Authors B. Nyland and K. GunnarssonIn 1981, an agreement was reached between the governments of Iceland and Norway delimiting the continental shelf between Iceland and the Norwegian island Jan Mayen. The agreement also defined a subsea area to be explored jointly by the two nations. This area covers a total of about 45 470 km², of which 32 750 km² is in the Norwegian sector.
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Reservoir modelling by the characterization of pore wall mineralogy
Authors T. Boassen and D. LeithThe objective of this technique is to improve the geological and petrophysical model of reservoirs through the characterisation of pore-wall mineralogies within existing reservoir frameworks.
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Kinetics of smectite to illite conversion
Authors H. Wei, E. Roaldset and M. BjoroyThe main claystone diagenetic process is the formation of illite from smectite via mixed-layer illite/smectite (US). Although this conversion has been used in variety of mineralogical and geochemical fields, its basic mechanisme remain unclear.
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Automated IR-analysis for the determination of reservoir qualities and source rock properties
Authors F. Oner, S. N. Ganz, W. Kalkreuth, M. J. Pearson and H. WehnerDuring the last years a geochemical routine for the determination of petroleum source rock characteristics using IR-spectroscopy has been developed. The spectra of isolated kerogen reveal information about kerogen type, thermal maturation and hydrocarbon potential.
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Hydrocarbon generation and heat flow history - A sensitivity analysis from the Viking graben
Authors U. Ritter and M. B. MyhrOne of the principal questions in modelling hydrocarbon generation is the extent to which paleoheat flow may have been different from present heat flow, and how this uncertainty affects hydrocarbon generation. In our study the sensitivity of hydrocarbon generation is demonstrated for shallow (less than 4000m maximum depth of base Jurassic), intermediate (4500 to 5500m) and deep (4500 'to 7500m) parts of the Southern Viking Graben.
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Relative permeability measurements under simulated reservoir conditions
By R. SobottFossil fuels such as natural oil and gas will continue to play an indispensible role for the supply of energy to industry and private households in the foreseeable future. It is therefore of vital importante to dispose of these energy carriers in sufficient amounts at economically reasonble conditions.
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Applications of fast stochastic prospect appraisal
Authors H. Andersen and S. B. NielsenIdeally, the outcome of the proces of prospect appraisal is a reliable summary of the pre-drilling information available regarding types and volumes of hydrocarbons in a specific structure. Reliable in this context means that volume estimates are accompanied by realistic measures of uncertainty. By the procedure of stochastic (Monte Carlo) simulation, which involves many forward calculations with different possible combinations of input parameter values, the uncer- tainty can be quantified as the chance of exceeding specific values of hydrocarbon volume.
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Random wildcat wells drilling as a method of sparing ecology oil-finding
More LessThe theoretical analysis shows that the average number of boreholes needed in a promising area to ensure not less than one of them to strike an oil in a favorable geological settings is independent of how the holes are located: whether on a dense network of seismic reflection surveying or at random without use of the detailed seismic reflection data and only from a sparce regional a priori geophysical and geological information.
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Strontium fingerprinting - Emperical tests of a new, deterministic method for predicting reservoir communication
More LessIncomplete or ambiguous knowledge about communication is an important area of uncertainty in reservoir simulation. A new deterministic method, Strontium Fingerprinting, has proven to give exact predictions of reservoir communication and flow units in five north-sea fields. In four cases the predictions matched known behaviour of the fields from production data and an interference test. In the last case, a field not yet in production, Strontium Fingerprinting results closely correspond to interpretations from well test data.
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Geotechnical planning of extended reach wells - wytch fram dorset
Authors N. M. McClure, D. W. Wilkinson, D. P. Frost and G. W. GeehanThe extended reach drilling programme adopted for development of the offshore extension of the Wytch Farm oil field has called for the accurate prediction of reservoir characteristics and for improved methods of depth control. This paper considers how key attributen have been quantified using a fully integrated geotechnical approach to determine an optimum development well trajectory.
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Natural gas storage in South Kavala reservoir related to the seismicity of prinos-kavala basin
Authors A. Georgakopolous, C. M. Papaconstantiniou and C. A. PapaioannouThe Prinos-Kavala sedimentary basin is located at the northern part of the Aegean Sea, south of the city of Kavala and north to north-west of Prinos point on Thasos island.
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Mapping outside borehole reflectors with crosshole reflection imaging
More LessAn attempt to image outside of inter-well area has been made with crosshole reflection imaging technique. A computer and physical model with reflectors in both sides of inter-well area and beneath inter-well area were created for investigation. Prestack reverse time migration applied on crosshole common shot gathers successfully imaged reflectors outside boreholes area. Combined migration of crosshole and reversed VSP data sets increased the image quality substantially. Combination of this method and crosshole tomography is recommended for accurate, high-resolution survey of the near surface.
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Application of S.A.R. technique and direct wave measurements to mining exploration
Authors M. Picollo, B. Illich and G. de PasqualeThe interest of the mining industry for an improved G.P.R . methodology and the results from a previous research gave birth to the present Brite EuRam II research project "Development and Improvement of G.P.R. System Applied to Minieg Exploration" aimed to solve the mare limitations and to improve the methodology's performances.
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Quick method for identifying geological anomalies
Authors K. Sydykov and A. MatusevichIt was shown before that cooperative inversion of gravity and seismic data provides uninterruptable salt roof model that is maximumly consistent with both seismic data and gravity map [1].
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Orogenic and platform petroleum systems in Romania - Definition and forecasting of remaining resources
Authors B. M. Popescu and M. C. StefanescuUsing available source rock, seep, show and oil field data, 13 petroleum systems have been defined in the Romanian hydrocarbon producing sedimentary provinces. Designation of systems followed Magoon's (1988) identification rules. Limits shown in Fig.1 are those of the migration-entrapment (Demaison and Huizinga, 1991) subsystems.
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