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60th EAGE Conference and Exhibition
- Conference date: 08 Jun 1998 - 12 Jun 1998
- Location: Leipzig, Germany
- ISBN: 978-90-73781-09-2
- Published: 08 June 1998
401 - 420 of 489 results
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Thermal Effects of Basaltic Sill Emplacement in Source Rocks for Maturation and Hydrocarbon Generation
Authors D. A. Karlsen, S. Dahlgren, B. Jarntveit and T. KjærnetBasaltic sill intrusions are abundant in many sedimentary basins, particularly those associated with continental rifting and breakup.
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Hydrocarbon Maturation and Magmatic Intrusions in the Gjallar Ridge
Authors W. Fjeldskaar, H. Johansen, I. Horstad and M. HelsetThe Gjallac Ridge is an area of complex geology situated in the west of the Vøring Basin, Norwegian Sea. Regional structural work in the area suggests multiple phases of rifting. Extensive magmatic activity look place in the Vøring Basin related to the Early Cenozoic rifting. Seismic data indicate the existance of considerable amount of sills in the area. This paper reports quantification of the effect of magmatic intrusions on the palaeo temperature regime and on the hydrocarbon maturation.
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Assessing Hydrocarbon Charge into Block 36/7, PL153, Northern North Sea, Norway
Authors Ø. Sylta and T. HanesandJ2 is a down-faulted roll-over structure along the Qsygarden Fault Zone (ØFZ) in block 36/7 (PL 153) on the Horda platform, Northern North Sea. The fault is located less than 30 km from the Norwegian mainland. The J2-trap has only a small structural closure, but sealing along the ØFZ could create prospects with significant trapping volume.
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Modelling Multi-Valued Salt Masses in a Three-Dimensional Structural Context
Authors K. S. Hoffman, R. Lattuada and J. W. NeaveThe three-dimensional nature of salt bodies has historically been a problem in visualization and interpretation. Traditional approaches, based on two-dimensional grids, cannot handle the multivalued surfaces of salt overhangs, lenses, or other features. Some three-dimensional modeling approaches allow multi-valued surfaces, but cannot combine the image of a salt body with surrounding structural layers. These limitations can be avoided by combining appropriate salt modeling techniques with a geospatial structural model.
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Analysing and Simulating Stratigraphic Patterns Using Extended Markov Chain Analysis
Authors J. E. Bekkevold and A. H. BrilMarkov Chain Analysis is a standard tool to detect and characterise vertical ordering in stratigraphic sequences. To obtain the full predictive power of the transition information in a sequence, we have generalised the standard Markov Chain Analysis to account for the full pattern for any order m. In this way, the analysis yields a probability structure for how the occurrence of a stratigraphic element is related to patterns of immediately preceding elements. If significant relations are found, this information can be used for interpretation of depositional processes and environment as well as for quantitative stratigraphic simulations and subsequent interpretation.
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A New, Upper Jurassic Play in the Norwegian Southern Viking Graben
Authors J. Clark, C. Dodd and S. A. ØstensenRecent drilling in Norwegian Block 15/6 (see fig. 1 for block location) has shown that Middle Jurassic and Late Palaeocene reservoirs lack hydrocarbon charge, despite their position on the margins of an oil-generating local Late Jurassic basin on the eastern flank of the Viking Graben. The local Late Jurassic basin is informally called the Sleipner Basin (fig.2).
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Successful Exploration of the Pliocene Offshore Nile Delta, Egypt Using Seismic Anomalies - a Case History
By A. J. SharpThe Offshore Nile Delta, Arab Republic of Egypt has seen a prolific new trend of Plio-Pleistocene gas discoveries in recent years.
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Gas Exploration and Production in Tunisia - Status and Future Prospects
Authors R. Ghenima, A. Gaaya and F. EssidDespite worldwide large and numerous gas discoveries during the sixties and seventies, the exploration for gas in many regions, was considered as marginal, compared to that devoted for oil. Many sedimentary basins were quoted as high risk basins because they were considered as « gas prone ».
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Variations in Stress Regime through Time - their Effect on the Formation and Modification of the Kutai Basin, Kalimantan
Authors I. R. Cloke, J. Craig and D. J. BlundellSpatially and temporally varying stress regimes have been interpreted from various extensional basins throughout the world. We use the Kutai basin in Eastern Kalimantan, Indonesia to demonstrate the importance of a rotating stress regime in the formation and subsequent modification of the basin geometry through time.
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HC Resources of the Sea of Okhotsk Rift Basins in the Light of Fuel Demand in NE Asia
More LessThe Sea of Okhotsk region is one of the most geologically complex regions in the world, including elements ranging from ancient blocks of Precambrian-Paleozoic consolidation to the recent active volcanic island arc zones.
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Measuring Appraisal Succes - the Economic Reality
By F. DemirmenA number of performance measures, e.g. volume of hydrocarbons discovered per unit of drilled footage, have been used in the industry to measure success in exploration. No such measure has been proposed in the literature for (subsurface) appraisal. Such an indicator is important because the industry spends large amounts of money on appraisal, and performance measures designed for exploration are not generally appropriate for appraisal.
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From the First Shot to the Platform Location in Five Months
Authors M. Biancone, G. La Bella, E. Loinger and J. SamarzijaThe Croatia 3D - Multidisciplinary Project is an exploration and development project consisting of the acquisition, processing and interpretation of 3D seismic survey covering an area of 1860 sqkm, located in the Adriatic Sea.
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Non-Uniqueness of Seismic Inversion - Quantified by Geostatistics
Authors O. Dubrule, P. Lamy, P. S. Rowbotham and P. A. SwabyThanks to the local stochastic optimisation approach of Geostatistical Inversion (Refs 1, 2)., the method allows the generation of 3D high-resolution acoustic impedance models constrained by seismic data.
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Porosity Prediction from Seismic Inversion Using Artificial Neural Networks
Authors P. O. Ecoubleit, W. W. Symes and S. A. LevinArtificial neural networks have been used to extrapolate lithology and fluid content logs away from wells, by exploiting the correlation of these properties with seismic attributes [2]. Seismic inversion provides an alternative source, of input to this process.
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3D Seismic Lithology Inversion for Improved Reservoir Characterization on the Bongkot Field, Gulf of Thailand
By R. HopeThe Bongkot field is situated in the North Malay Basin, Gulf of Thailand, 800 km south of Bangkok. The field has been in production since 1993.
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3D Seismic and its Impact on a Fast-Track Development, Offshore Egypt
Authors S. C. Lynch, J. Swallow and T. PerchardThe use of 3D seismic as an exploration tool offshore Egypt has proven highly successful for British Gas International and partners in 1997. Drilling in the BG operated Rosetta Concession, located in the western Nile Delta, has resulted in a success rate over 4 wells of 100% and the discovery of three new gas fieIds (P1, P2 and P3).
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