Reservoirs and some production issues Flashcards
what controls the flow of fluids through rocks?
size of pores and pore throats.
if you take a liquid/gas out of a rock how will it effect temp and pressure?
temp not effected much
pressure decreases
If you have a mix of 2 fluids in 1 container….
at some point you will not be able to get 1 out.
what % of oil in a reservoir can be extracted with primary recovery (natural drive)
5-30%
what % of oil in a reservoir can be extracted with secondary recovery (injecting gas/water/steam into it, forcing additional petrol out)
25-60%
how do faults effect fluid migration
Faults may act as seals or conduits (a channel for conveying fluid) to fluid migration.
2 ways faults can form seals and trap hydrocarbon accumulations….
- Juxtaposition or reservoir rock across the fault against low-permeability or impermeable rocks.
- Fault rock development creating an area of very low- permeability.
Faults may ‘compartmentalise’ a reservoir.