Capstone: An Offshore Oil Field

Part 14, Chapter 14: Capstones and Final Assessment

The Whole Course on One Field

This capstone runs everything you have learned on a single offshore oil field. The static model, from geology, petrophysics, structure, and geostatistics, sets the oil in place; the dynamic model, from drive, displacement, and simulation, sets the recovery factor; and their product is the reserves.

Capstone: an offshore oil fieldoil in place = 114 MMbbl (reservoir quality)15%21%primarywaterfloodunrecovered41 MMbbl reservesrecovery factor 36% of 114 MMbbl in placeReserves = oil-in-place times recovery factor: the static model sets the volume, drive and sweep set the factor, and the whole course lands here.

From Rock to Reserves

Reservoir quality fixes the volume in the ground. Natural aquifer support gives the primary recovery, and the waterflood mobility ratio sets how much more the injected water sweeps. An unfavorable ratio shrinks the secondary share and leaves oil behind.

The Number That Decides

Reserves, oil-in-place times recovery factor, is the single number a development hangs on. Every chapter of this course feeds into it.

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