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Gjestvang, Jørgen (2016)
Publisher: University of Stavanger, Norway
Languages: English
Types: Master thesis
Subjects: Fluvial, reservoir characterization, petrofysikk, petroleum engineering, petroleumsteknologi, :Technology: 500::Rock and petroleum disciplines: 510::Petroleum engineering: 512 [VDP], Statfjord, petrophysics, Snorre
Master's thesis in Petroleum engineering The fluvial sandstone in the Snorre field consists of braided to meander streams deposited in arid and in humid climate that show a clear differences in the sedimentology and reservoir properties, especially the silt content in large part of the reservoir which decrease the reservoir properties and water saturation. The heterogeneity of these fluvial formations combined with the faulting history makes this reservoir highly complex with many local and regional barriers. In addition erosion up to 1000m in some part of the reservoir subdividing the reservoir into six different fluvial assemblages with separate reservoir properties. These six fluvial assemblages are evaluated from conventional core analysis consisting of porosity, permeability and grain density and results from SCAL reports including capillary pressure curves, grain size distribution and determination of factors such as; Formation factor, cementation factor, lithology factor and saturation factor applied in determination of the water saturation. The reservoir results are compared with drill stem tests for evaluation of the zone properties compared to the petrophysical properties. The reservoir is segmented based faults interpretation, pressure data, fluid analysis and results from the drill stem tests.

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