1887

Abstract

Summary

It was concluded that some radiolarites, found within Bazhenovo Formation are biogenic contourites. These are represented by granular varieties, hydrodynamically sorted, with lenticular, cross‐bedded or disordered structures and fish bone accumulations. Due to the concentration of mainly coarse‐grained components (radiolarian, fish bones, Onychites), its porosity and permeability for fluids were increased and carbonization and oil‐saturation were the consequences. The biogenic contourites now represent highly promising interlayers in the Bazhenovo Formation. In addition, the involvement of contourite drift can explain the facies variability and contrast variations in thickness of the Bazhenovo formation in the most productive areas, which, in turn, tend to be associated with topographical elevations on the sea floor.

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/content/papers/10.3997/2214-4609.201900467
2019-04-08
2020-04-06
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