Geofluids / 2017 / Article / Tab 2

Research Article

The Early Cambrian Mianyang-Changning Intracratonic Sag and Its Control on Petroleum Accumulation in the Sichuan Basin, China

Table 2

Reservoir features of the Ediacaran Dengying Formations across the intracratonic sag.


LocationsWestern margin of the sagEastern margin
Reservoir2nd member3rd and 4th members2nd and 3rd members2nd and 4th members
Permeability0.0063–5.9317 mD0.1–1.92 m0.00225–88.2 mD1.005–8.02 mD
Bitumen contentNo1%~6%1%~5%1%~5%
Pore typeDissolved poreFracture and poreDissolved poreDissolved pore
Fracture density15.3/m24.75/m4.22/m1.4/m
Density of karst cave0.75/m1.3/m25/m11.4/m
Vugs-filling mineralsDolomiteDolomite-saddle dolomite-bitumenSaddle dolomite-bitumenSaddle dolomite-bitumen
Weathering karstWeakMediumStrongVery strong
Burial dissolutionWeakModerate strongStrongVery strong
Hydrothermal dissolutionWeakModerate strongStrongVery strong

(For locations, see Figure 1.)

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