10.11440060511_si_001.pdf (37.76 MB)
Download fileManaging Reservoir Uncertainty after 5 years of field life - Britannia Field
journal contribution
posted on 2020-04-30, 14:19 authored by W. R. SUMNER, S. LOUTIT, E. TOHILL, D. WAY, D. CRIDDLE, A. PALFREY, W. G. HAKES, S. ARCHER, J. COLLERAN, A. SCOTT, K. KAISER, A. HARDING, A. CASTELLINI, J. CLARK, QI LIANSHUANGThe Britannia reservoir consists of deep-water sandstones of mass flow origin,
ranging from high density 'clean' turbidites to non-reservoir facies consisting of
debris and slurry flows. Britannia reservoir models rely on over 20,000 ft of core
to define the reservoir zonation and facies scheme within the static reservoir
model. Recent core-based reservoir studies, including a refinement of the depositional
models for upper reservoir Zones 50, 45, and 40, fault seal property evaluation,
and detailed diagenetic studies, have further benefited the earth model. A
rigorous re-correlation study based on biostratigraphy and geochemical
chemostratigraphy have led to refined flow unit definition. The main rock types in the Britannia field are S3 Clean, Banded, and Mixed
Slurry Sandstones. Each of these has its own particular petrophysical
characteristics that decrease in reservoir quality as listed above. Therefore it is
essential to understand each rock type's depositional and sedimentary
architecture. In addition, remobilisation of sediments means that the initial
depositional orientation may not necessarily reflect resultant slump orientation. Cores from the Zone 40 sandstone are displayed together with well crosssections
to demonstrate variations in gross lithological distributions, both
geographically and stratigraphically.
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non-reservoir faciesdepositional modelsslump orientationslurry flowsreservoir modelrock types5 yearsBritannia reservoirearth modeldepositional orientationMixed Slurry Sandstoneslithological distributionsZone 40 sandstoneS 3 CleanBritannia reservoir modelsRecent core-based reservoir studiesBritannia Fieldpetrophysical characteristicsBritannia fieldManaging Reservoir Uncertaintyflow unit definitionreservoir zonationfield lifediagenetic studiesreservoir qualitygeochemical chemostratigraphyfacies schemere-correlation studydeep-water sandstonesrock typemass flow originGeology