The case for waterflooding
The basics of oil recovery
- Properties and genesis of oil
- Rock and water properties
- Imbibition/Drainage process
- Capillary trapping
- Aspects of sweep
The physics of immiscible displacement
- Darcy’s law
- Relative permeability and wettability
- Fractional flow
- Application of BLW
- Exercise 01: Estimate a waterflood forecast range
The importance of Chemistry
- Water properties
- Ion concentration and distribution
- Mixing and scaling tendency
- Geochemistry
- Sandstones: Types of clays which can impact flooding
- Carbonates: Salinity and pH
- Exercise 02: Estimate the clay swelling potential for a proposed waterflood
Geomechanics:
- In-situ stress
- Impact of depletion and cooling
- Matrix injection design attributes
- Fracturing injection design attributes
Geology and Geophysics:
- Yes, Geology is important
- The role of Geophysics in waterflooding
Flood design:
- Throughput vs recovery
- Determining the volume of required injection water
- Estimate number of wells and how to optimise cash flow
- Pattern selection
- Impact of well cost
- Traditional patterns, the pros and cons
- Matrix vs fracturing
- Phasing
- Repurposing
- Exercise 03: Propose the waterflood pattern and recovery forecast for a newly discovered field
Well selection:
- Well orientation
- Well completion aspects
- Sand control
- Crossflow
- Zone selectivity
- “smart” components
- Gauges, fibre and tracers
Facilities Specification:
- Specifying the required water quality
- Facility/process options
- Operability
- Green or Brown?
- Exercise 04: Select the required process
Waterflood Management:
- Determining the gearing ratios
- Defining critical equipment
- Key aspects to monitor
- The use of dashboards
- Exercise 05: Identify what went wrong and propose how to fix it