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Reservoir Parameter Study for the IDDP

ORKUSTOFNUN GeoScience Division. 13.10.2002. Reservoir Parameter Study for the IDDP. Ómar Sigurðsson Orkustofnun. ORKUSTOFNUN GeoScience Division. 13.10.2002. Introduction.

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Reservoir Parameter Study for the IDDP

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  1. ORKUSTOFNUNGeoScienceDivision 13.10.2002 Reservoir Parameter Study for the IDDP Ómar Sigurðsson Orkustofnun

  2. ORKUSTOFNUNGeoScienceDivision 13.10.2002 Introduction • Project to study the petrophysical properties of host rocks for geothermal systems started 9 year ago at Orkustofnun • Mostly eroded geothermal systems have been sampled for representative rock specimens • The rock database currently has over 500 samples that have been studied for basic reservoir parameters • Thin sections made of nearly all samples and chemical analysis on more than 200 samples

  3. ORKUSTOFNUNGeoScienceDivision 13.08.2002 ORKUSTOFNUN GeoScience Division 13.10.2002

  4. 13.8.2002 ORKUSTOFNUNUNGeoScience Division

  5. 13.8.2002 ORKUSTOFNUNUNGeoScience Division

  6. ORKUSTOFNUNGeoScienceDivision 13.10.2002 Core measurements made by • CoreLab in Aberdeen, UK • Geological Survey of Denmark and Greenland (GEUS), Danmark • Geological Survey of Norway (NGU), Norway • Chalmers Technical University (CTH), Sweden • New England Research (NER), U.S.A • McGill University, Canada

  7. ORKUSTOFNUNGeoScienceDivision 13.10.2002 Reports and papers (E = English, I = Icelandic) • Reservoir parameters. Sample collection. (I) • Reservoir parameters. Measurements on rock samples. (I) • Reservoir parameters. Status of petrology study at end of 1997. (I) • Reservoir parameters. An emperical relationship to change measured gas permeability to water permeability. (I) • Reservoir parameters. Permeability and capillary tube model. (I) • Reservoir parameters. TCP-project a thin section study of the Öskjuhlid samples (E) • Reservoir parameters. Interaction of alteration and chemical contents in rocks. (I)

  8. ORKUSTOFNUNGeoScienceDivision 13.10.2002 Continue Reports and papers (E = English, I = Icelandic) • Reservoir parameters. Thoughts about calsite (and pyrite) in geothermal systems. (I) • Reservoir parameters. Chemical analysis on rocks 1997. (I) • Reservoir parameters. Relation between chemically determined CO2, clasite and bonded water. (I) • Basalt as a reservoir for oil and gas. (E) • Natural gamma ray logs in volcanic rocks. (E) • Petrophysical properties of Icelandic rocks. (E) • Reservoir parameters. Status of project at end of 1997. (I)

  9. ORKUSTOFNUNGeoScienceDivision 13.10.2002 Continue Reports and papers (E = English, I = Icelandic) • Core measurements and geothermal modelling. (E) • Reservoir parameters. Physical properties of rock samples. Status of measurements and their interpretation in the year 2000. (I) • Database on igneous rock properties in Icelandic geothermal systems-Status and unexpected results. (E) • Porosity structure of Icelandic basalt. (E) • Petrophysical properties of Öskjuhlid lavas, part 1: A study of the porosity, permeability and electrical resistivity of a recent olivine tholeiite lava flow. (E) • Petrophysical properties of Öskjuhlid lavas, part 2: A study of thermal conductivity of an olivine tholeiite lava flow. (E)

  10. ORKUSTOFNUNGeoScienceDivision 13.10.2002 Continue Reports and papers (E = English, I = Icelandic) • An unusual permeability anomaly in a Pleistocene shield-lava in Öskjuhlid, Iceland - A study based on empirical relationships between petrophysical parameters, mineralogy and chemical composition. (E) • Predicting permeability in Icelandic basalts. (E) • An assessment of chemical transport in geothermal systems in Iceland. (E)

  11. ORKUSTOFNUNGeoScienceDivision 13.10.2002 The IDDP borehole • Planned depth 5000 m. Cored interval 2500-5000 m • Proposed to take samples on average every 10 m for reservoir parameter study or about 250 samples • Basic reservoir parameters measured on all samples, specialized measurements on about 20% of the samples • Goal - Reservoir characteristics of the deep part of

  12. ORKUSTOFNUNGeoScienceDivision 13.10.2002 Goals • Reservoir characteristics of the deep part of geothermal systems • The upflow or recharge part of the reservoir • Reservoir parameters and relations to well logs • Predictive relationships

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