Mobility of Pore Fluids with Reservoir Deformation:
Does the restructuring of complex reservoir pore-geometry take place during/following the transportation of water, oil & gas towards the production well OR the transportation of these pore-fluids results from the restructuring of the pore-geometry – upon hydrocarbon production? In short, among ‘reservoir-deformation’ and ‘mobility of pore-fluids’, which induces the other?
On a general note, how long will it take for a significant restructuring of the pore-geometry (deformation) to occur in a typical petroleum reservoir?
Will ‘the time period associated with the deformation of reservoir pore geometry’ be comparable with that of ‘the time period required for the migration of water, oil & gas’?
If you don’t define ‘significant deformation’ and ‘typical reservoir’ your question cannot be answered meaningfully.
In principle it depends on the degree of consolidation (= mechanical strength) and the amount of pressure depletion. In poorly consolidated water- bearing sands pore deformation / compaction starts immediately once water is pumped from the reservoir. In more consolidated rocks such as the Groningen gas field (Rotliegendes sandstones at ~3000 m TVDSS ) induced seismicity ( read reservoir compaction) became a serious issue after some 60% of GIIP had been produced
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