Initialization view in IMEX™

If you selected a Simulation Concept with a Fluid Model on the Create Case form, the 'Initialization Region IDs', reference pressure, reference depth and fluid level depths will be auto-populated.

Initialization data is composed of one or more initialization regions for which pressure and depth, contact depth, water saturation, and other data is defined. Each initialization region may be associated with a different area of the simulation grid by adding initialization regions in this tab.

The master table for the Initialization view (located in the left panel of the view) contains a list of initialization regions:

Active  Determines whether initialization region is active.  Inactive regions are not written to the deck.

Name  Name of the region.

Region ID  ID of region used in the deck.

Important  Make sure you undertake the following rules before assigning the Region ID. An error message is displayed if a rule is broken.

1. The Region ID must have a value greater than or equal to 1.

2. The active Region ID numbers must start with 1 and have values increasing by 1.

3. Active models must not have unique Region ID numbers.

Parameters tab

The Parameters tab of the Initialization view contains parameters that describe the selected initialization region.

Vertical Equilibrium Selection (VERTICAL)  Controls the type of reservoir initialization calculation. Indicates that pressures are determined from the hydrostatic equation and saturations from the capillary pressure tables. Clicking on the button opens up the Vertical Equilibrium Selection tuple editor.

User specified (USER_INPUT)  Control the type of reservoir initialization calculation. Specify pressure and saturations of each grid block.

Pressure (REFPRES)  Indicates input of reference pressure. The reference pressure at the reference depth are used in the vertical equilibrium option, along with the capillary pressures, fluid densities, water-oil contact and the gas-oil contact depths, to calculate the block pressures and saturations.

Depth (REFDEPTH)  Indicates input of reference depth.

Water-Oil Contact (DWOC)  Defines the depth to the water-oil plane.

Gas-Oil Contact (DGOC)  Defines the depth to the gas-oil contact plane.

Water-Gas Contact (DWGC)  Defines the depth to the water-gas contact in a reservoir in which no oil is present.

Above Gas-Oil Contact (GOC_SW)  Allows you to define the water saturation above the gas oil contact for each PVT Region.

Below Water-Oil Contact (WOC_SW)  Allows you to define the water saturation below the gas oil contact for each PVT Region.

Gas-Oil capillary pressure at the gas-oil contact (GOC_PC)  Defines the gas-oil capillary pressure at the gas-oil contact.

Water-Oil capillary pressure at the water-oil contact (WOC_PC)  Defines the water-oil capillary pressure at the water-oil contact.

Gas cap initialization (GASZONE)  Specifies whether residual oil saturation is to be set initially in the uppermost part of the reservoir where the difference in the oil and gas phase pressures exceeds the largest tabulated value the oil-gas capillary pressure.

PBT tab

This tab contains parameters for describing the bubble point pressure.

Depth  Indicates the input of bubble point pressure as a function of depth.

Pb  Bubble Point Pressure.