Table 4.

Facies associations of the Toarcian–Bajocian deltaic system and their reservoir quality; locally increased thicknesses due to salt tectonics not considered

Facies associationIndividual reservoirsCompound reservoirs
TypeNet-thicknessPorosity (ϕ) (M)Permeability (k) (M)Target
Delta plainWetlandsNo reservoirs
Sheetsands0.52–5.0 mStacked sheetsands1.0–15 m24%200 mDNo
Distributary channel5–20 mChannel belt5–70 m25%1426 mDYes
Levee–crevasse splay complex1–20 m
Interdistributary bayNo reservoirs
Delta frontTerminal distributary channel5–10 mDistributary/Mouth bar10–50 m23%498 mDYes
Mouth bar5–30 m
ShorefaceBarrier shoal2–5 mShoal sands5–20 m24%82 mDNo
ProdeltaProdelta, proximalNo reservoirs
Prodelta, distalNo reservoirs
  • M, mean.