Group 2/5 & 1/6

GF Village 2012

IOR-challenge 2. Existing H1 model with permeability modifications.

1. Discuss the use of the Abio gel and how it can be simulated in Eclipse.

2. Make a base case Eclipse simulation with existing wells in H1 without chemical injection. Additional perforations in the wells are possible.

3. Simulate chemical injection with use of permeability reduction keywords in Eclipse. Tips: Use tracer option to find out where the waterways are.

4. Estimate EOR and calculate Net Present Value for the measure. Chemical cost is 20 MNOK and oil price fixed to 100 $/bbl. Use discount of 8%.

GullfaksVillage 2012 – Group 2 &5

GullfaksVillage 2012 – Group 1 & 6

IOR-challenge 3. Existing H1 model with transmissibility multiplicators between cells

1. Discuss the use of the Abio gel and how it can be simulated in Eclipse.

2. Make a base case Eclipse simulation with existing wells in H1 without chemical injection. Additional perforations in the wells are possible.

3. Simulate chemical injection with use of transmissibility reduction keywords in Eclipse. Tips: Use tracer option to find out where the waterways are.

4. Estimate EOR and calculate Net Present Value for the measure. Chemical cost is 20 MNOK and oil price fixed to 100 $/bbl. Use discount of 8%.

4

Lower Brent, segment H1

• STOOIP in lower Brent is 20,3 MSm³ oil.

• Lower Brent in H1 has ”only” 57 % recovery factor.

• Potential 2 - 5 MSm³ mobile oil left.

• Relatively isolated segment.

• A lot of data is collected in this area. It was the first production area and therefore a lot of good, initial data.

• 2 wells in lower Brent, A-35 (injector) and A-39A (producer).

• 2 producers in upper Brent, B-37(partly in LB) and A-38A.

• Pressure communication between B-37 and lower Brent. No communication from A-35 to A-38A.

5 -

Classification: Internal (Restricted Distribution)

6

Workflow

• Activate tracer option in existing model

• Water tracer follows water path (flooded area in reservoir), based on tracer distribution generate new PERMXY /TRANXY

• Export generated properties into file

• Create model restart point

• Include generated properties into restarted model

• Simulate prediction case

• Sensitivity study on placment on abiogel, RRF, date of treatment.

How to add tracer to the ECL model?• PROPS

TRACER - Set up tracers

'EOR' 'WAT' /

/

• SOLUTION

TBLKFEOR - Initial tracer concentrations

416000*0.0 /

• SUMMARY

WTPREOR -Tracer production rate (WTIREOR injection rate)

/

WTPTEOR -Tracer production total

/

WTPCEOR -Tracer production concentration

/

• SCHEDULE

DATES

1 'JAN' 2012 /

/

WTRACER

'A-35' 'EOR' 10000 /

/

DATES

10 'JAN' 2012 /

/

7

How to reduce given properties?• In FloViz load reservoir model

• Create new property

− Edit– Classic Property Calculator

− Property creation parameter – New property

− Create Property Type– Property Type Name, Recurrent

− In Generated by--- Advanced, use script, for example:

IF (EORF>250) THEN PERMX or TRANX*0.02

ELSEIF

((EORF<250) AND (EORF>40)) THEN PERMX or TRANX*0.04

ELSEIF

(EORF<50) THEN PERMX or TRANX*1

ENDIF

Here RRF (Residual resistance factor) is in the range 25-50.

• Based on given script simulator will generate new property for each simulation time step

8

How to export generated property?

• In FloViz, File-- Export – Property – Eclipse Restart .GRDECL keywords

• Find time step from the list for which generated property is required (for ex. 01.Jun2012)

• From Recurrent Properties list select generated properties and save them to the file.

• Open the file and rename property name with Eclipse keyword, for example

− TRANXEOR to TRANX

9

How to restart Eclipse model?

• Find the time step from which the model should be restarted (for ex. 01.Jun 2012, timestep 317)

• SOLUTION

RESTART

'GF_LANDSBY2012_H1_PRED_TRA_RST' 317 / 1 jun 2012

• Remove from DATA file such keywords as EQUIL, PRESSURE, SWAT, SGAS, RS, PBUB, RV, PDEW, OILAPI, SALT, RTEMP, RTEMPVD, GI, PRVD

10

How to include generated properties?

• In DATA file for restarted model find include file with the properties need to be replaced

• Replace it with include file where generated properties are saved

• Model ready for simulation

• Reporting, sensitivity analysis, NPV

11

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Presentation title

Presenters namePresenters titleE-mail address ……@statoil.comTel: +4700000000

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