Category: Mature Water Flood Analysis

Brief

Mature Water Flood Analysis is a workflow for identifying the performance gaps in the mature waterfloods performance.

Mature Water Flood Analysis is applied to the Reservoirs and uses Daily Measures/Monthly Measures for production/injection data.

As a result Mature Water Flood Analysis generates Blocks/Patterns Enhancement List.

The goal of the waterflooding

The goal of the water flooding is to inject the least possible water to produce the most possible oil in the shortest possible time.

Workflow

1. Upload the required data
2. Gridding - Divide the field into Patterns/Blocks/Buckets using the Bubble map by identifying dominant no-flow boundaries. No-flow boundary is a line in the reservoir where reservoir fluids do not cross. Oil and water on either side of the line flow away from this line.
3. Calculate well allocation factors, WAF, for blocks\patterns
4. Calculate HCPV, HCPVinj, RF, VRR, VRRcum for each reservoir using blocks
5. Match total HCPV to STOIIP numbers by changing the edge Blocks areas
6. Make Plots (by field, by reservoir, by block): History, RF vs HCPVinj, RF vs well spacing, WOR vs Np, VRR vs t
7. Make Maps (by reservoir) showing Blocks: HCPV, HCPVinj, RF, VRR
8. Make Cross sections
9. Calculate Blocks Enhancement List
10. Create Action List
11. Execute

Repeat steps 5-6-7-8-9-10 routinely (monthly, quarterly, half year).

Data Required

• Create Fields
• Upload Reservoirs
• Upload PVT
• Upload Wells
• Upload Deviation Surveys
• Upload Perforations
• Upload Well Log Interpretations
• Upload Monthly Measures

Action List

The typical actions are:

• Convert producing well to injector
• Shut in inefficient injection well, water-cyclers
• Increase/Decrease well injection rate
• Add/squeeze Perforations at producing or injection wells
• Drill infill production/injection well

References

Wolcott, D. ; Applied Waterflood Field Development, Energy Tribune Publishing Inc., 2009.