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- W2054786772 abstract "Cores drilled in a North Sea oil field reveal the existence of a siliceous level with an nextremely low porosity and permeability interbedded in the chalk oil reservoir. It is proposed that this silicification documents the mass transfer induced by a porous convective flow within the microfractured chalk. Numerical modelling of such circulation, using precise field observations as well as thermodynamic properties of aqueous solutions, is shown to support such a hypothesis. The precipitation of silica and calcite within the microfractures induced by the convection decreases the effective permeability of the chalk and destroys the convective circulation after a few million years. Nevertheless, during that period of time, a huge volume of water circulated (106 m3/m2). It is also proposed that such a circulation can be a driving mechanism for oil migration." @default.
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- W2054786772 date "1985-08-01" @default.
- W2054786772 modified "2023-09-27" @default.
- W2054786772 title "Convection in a North Sea oil reservoir: inferences on diagenesis and hydrocarbon migration" @default.
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- W2054786772 doi "https://doi.org/10.1016/s0012-821x(85)80010-8" @default.
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