Basic Set-Up

STEPS:

1 – ENTER GENERAL DATA

‘Data Preparation’ Choose ‘General Data’

‘Data Preparation’ Choose ‘Well and Flow Type’ and check those suits your well

2 – ENTER X-MAS TREE PROPERTIES

Double click on ‘X-Mas Tree’ and fill in the necessary box accordingly

Note: 1- Make sure your x-mas tree data entry is accordance to Figure-2. 2- This is the X-mas tree / well head on the seabed, NOT the x-mas tree on the platform!.

3 – ENTER WELL DEVIATION DATA

i - ‘Data Preparation’ ‘Deviation Data’ ‘Well Data’ii - ‘Data Preparation’ ‘Deviation Data’ ‘Surface Data’

Note:

1- Include all possible points which has both TVD and MD 2- Maximum deviation (last row) is set to mid-perforation of 6500 ft TVD not to the Total/Tag Depth (TD) of 6550 ft TVD!

4 – ENTER EQUIPMENT DATA

‘Data Preparation’ ‘Equipment Data’ ‘Well Data’Select ‘Type’ first before starts entering the data

Note: 1 – Node Depth is at the bottom of each component2 – Set the SSSV to the 64th in for the ‘Roughness’ column

5 – CONNECT THE ‘X-MAS TREE’ ON THE SEABED TO PROD. PLATFORM

‘Edit’ Add Riser, Connect between the X-mas Tree and Outlet Node

Note: 1 – Make sure to specify the insulation to ‘0’.

6 – ADDITIONAL OPTIONS

View Components’ Details:

‘View’ ‘Display as Icon’ / ‘Display as text’

‘Configure’ Preferences, check boxes in ‘Include in text display’

7 – ENTER PVT DATA

‘Data Preparation’ ‘Reservoir Control’ ‘Fluid Parameters’

‘Check’ Enter Reservoir Pressure and Temperature (to check the parameters)

‘Match’ Enter 2030 psi besides 150oC Temperature ‘Calculate’ to get the value of 2116 psi (Pb) ‘Best Fit’ to get 2030 psi as entered.

Note: 1 – Check that the calculated values should be more or less equal to the actual values

8 – ENTER / EDIT INFLOW PERFORMANCE RELATIONSHIP (IPR)

‘Edit Layer’ Enter all necessary data

‘Skin Analysis’ Check on ‘Use Calculated Skin’

HAGGIS-3

Note: In the Skin Analysis, change the ‘Damage Permeability’ from 50 to 100 md. Again check on the Actual PI and Skin from the well test.

9 – TO TUNE MODEL

‘Analysis’ ‘Operating Point’ Uncheck both ‘Sensitivity 1’ and ‘Sensitivity 2’ Uncheck ‘Stability Check’ Check ‘Iterate to exact operating Point’

‘Calculate’ (To get the Operating Rate and Pressure at Solution Node) – KEEP THIS VALUE TO BE .dvp NOTEPAD DATA.

10 – CREATE AND LOAD .rvp AND .dvp FILE USING NOTEPAD

Write ‘6977 2235’ on the notepad and save it as .rvp file. Write ‘6550 2235’ on the notepade and save it as .dvp file. LOAD these file.

‘File’ ‘Load Measured Data’ ‘Flow Rate vs. Pressure’ ‘Open’

NODAL ANALYSIS

11 – TO ENTER THE OPERATING POINT

‘Analysis’ ‘Operating Point’ Choose ‘Outlet Node’ as Top Node, ‘Casing’ as Solution Node.

In Temperature Model: Check ‘Calculated’ circle Enter 50o as T Seawater and 65o as T Atmosphere

Notes: 1 – Make sure to uncheck ‘Stability Check’ box 2 – Make sure to check ‘Iterate to exact operating point’3 – Check for both Sensitivities

12 – TO DETERMINE THE BEST CORRELATION

‘Calculate’ Check for number of successful ‘OK’

To Display Plot: ‘Results’ ‘Plot’ Check on the desired Type of Plots and what to ‘Include in Display’ ‘Plot’

Note: Check on the ‘Measured Data’, make sure there is a blue dot on the graph. The best correlation should be the closest to the measured data.

SECTION B:

Once the correlation has been determined. Go to Nodal Analysis ‘Correlations’ and select the determined correlation and L-Factor.

To get the ‘correct L-Factor’. Proceed with 2 sensitivities: o Sensitivity 1: Water Cut (30%)o Sensitivity 2: Layer Pressure (2800 psi)

Check with the given value in Table B-1. The value of oil production rate should be more or less equal to 4770 STB/d. (The L-Factor should be between 0.98 – 0.987)

1 – SENSITIVITY STUDY BASED ON THE ECONOMICAL WATER CUT

Proceed with the sensitivity studies for these value: o Sensitivity 1: Water Cut (From 30% – 50%)o Sensitivity 2: Layer Reservoir (2800, 2700, 2600 and 2500)

Note: 1 – Don’t forget to check both sensitivities before click on ‘Calculate’ and ‘Results’2 – Plot (Pressure vs. Depth Plot) should be based on each WC value to all four layer pressure. 3 – Note that the optimum WC will be around 47% - 49% (exact 48%) since at 52% WC there is no operating points.

SECTION C:

C1: ACIDISING

1 – Initially Damage Permeability is set at 100 md – In the Skin Analysis Section. Now change the Damage Permeability to 200 md – means the acidising has restored and improved the permeability by 200 md. The permeability can not be more than 200 md since the reservoir has 200 md permeability only. Note on the Skin value: 0.789

Conduct a similar sensitivities as is Section B, however, set the WC in between 48% - 52%.

Get two plots for these section: WC of 30% and water cut of 50%

SECTION C2: DEVIATED AND HORIZONTAL WELLS

1 – DEVELOP TWO CASE SCENARIOS: - C2.a1: 400 ft. horizontal section in the middle of reservoir- C2.a2: 75o deviated well penetrating the reservoir.

2 – CASE 1: 400 ft. horizontal section.

‘Data Preparation’ Choose ‘Reservoir Control’ Check on ‘Horizontal’ in Well Orientation section Choose ‘Edit Layer’ Choose ‘Skin Analysis’

In the Skin Analysis window, check ‘Open Hole’ in the Completion section Choose ‘Model’

To model horizontal section:

Input 50 (in ft) in ‘Nearest measured formation distance’ box in Convergence Skin section Check on ‘Use Effective Length’ in the Length section. Input 400 (in ft) in ‘Effective Length’ box. Click on ‘Calculate’ to calculate new skin.

Note: 1- Check for your horizontal profile i.e. heel, etc by choosing

‘Segmented’ in Well Orientation section2- Note that it automatically checked on ‘Damage’ only in the

Contributory Effects since we have chosen ‘Open Hole’ earlier, no perforation effect involves

3- 50 ft since its in the middle of 100 ft reservoir layer and 400 ft since the length of the horizontal section is set at 400 ft.

For part a) Plot two graphs: for maximum economic WC and at 30% WC

3 – CASE 2: 75o DEVIATED WELL

‘Data Preparation’ Choose ‘Reservoir Control’ Check on ‘Vertical’ in Well Orientation section Choose ‘Edit Layer’ Choose ‘Skin Analysis’

In the Skin Analysis window, check ‘Cased Hole’ in the Completion section Choose ‘Model’

To model 75o deviated well section:

Input 75 (in degrees) in ‘Well Deviation’ box in Deviation Skin section Input 386.37 (in ft) in the ‘Open Interval’ box in Limited Entry Skin section. Click on ‘Calculate’ to calculate new skin.

Note: 4- Make sure the ‘Nearest Measured Formation distance’ is set at 0.5- Check all boxes in Contributory Effects section.6- Note that the skin is now ‘negative’ since deviation improves well’s PI

For part a2), Plot two graphs: for maximum economic WC and at 30% WC

4 – FOR PART C: SENSITIVITY ON HORIZONTAL SECTION LENGTH

Sensitivity based on the incremental of 50 ft on the initial horizontal section (400 ft)

‘Analysis’ ‘Operating Point’ ‘Sensitivities’ Check on ‘Sensitivity Case 2’ Click ‘Edit’ Input the necessary values in the boxes (from 400 onwards in the incremental of 50 ft)

Note: 1 – There are two sensitivities: Water Cut (Sen. 1) and Effective Length (Sen. 2)2 – The Effective Length sensitivity is under ‘IPR Skin Parameters’ in the sensitivity groups section. Must do this first before proceed to calculate.

5 – FOR PART D: ECONOMIC ANALYSIS BASED ON NEAREST 500 ft. OF HORIZONTAL LENGTH

Steps are similar as in Part C. However, varies the Effective Length (for Sensitivity Case 2) from 500 to 6000 ft (in the increment of 500 ft). Sensitivity Study 1 should remain the same.

Plot all related graphs. Make sure the comparison with the base case is using similar properties, such as, 30% WC and 2800 Pres.

PART C3: ARTIFICIAL LIFT

C.3.1.: ELECTRICAL SUBMERSIBLE PUMPS

1 – CHOOSING THE MOST SUITABLE PUMP.

‘Configure’ Choose ‘ESP Pump Data’ Select Pump Manufacturer (in this case: Centrilift Select Pump Model listed in the handout. Click ‘Plot’