EOR lab smal

Development of Ekofisk

Advanced Water Flooding 1 (AWF 1)
Technology Readiness Level 0

The objective is that advanced water flooding techniques based on more accurate geo-models can improve the recovery in Ekofisk reservoirs, compared to default water flooding, using seawater. It remains to be seen which method is most effective and most cost effective.

Naturally occurring fractures in chalk reservoirs provide essential conduits for fluid flow. A more accurate geomechanical based implementation of the fractures in the models will reduce the risks in designing the waterflood treatment, and therefore lead to improved sweep efficiency compared to a waterflood based on current fracture models.

DHRTC Hypothesis

The hypothesis is that oil recovery can be increased by using advanced water flooding techniques, so-called SmartWater methods (salinity of the injection water is altered either by removing or adding salts). Two other advanced water flooding methods are also currently under investigation, low concentration surfactant flooding and DEW (DME Enhanced Waterflooding).

The Development of Ekofisk group is subdivided into 5 work packages:

The expectation is that advanced water flooding techniques based on more accurate geo-models can improve the recovery in Ekofisk reservoirs compared to default water flooding using seawater, but it remains to be seen which method is most effective and most cost effective.

Expected Key Deliverables at TRL-3

  • Suitable IOR/EOR methods identified (Modified salinity waterflooding/DME waterflooding/Low concentration surfactant flooding)
  • Workflows for generating a discrete fracture network geomodel.
  • Outcrop descriptions for calibrating subsurface fracture models
  • Water-based recovery processes and core flooding experiments at lab scale
  • Core flooding models for lab scale experiments
  • Fluid characterization and wettability analyses
  • Upscaling of core flooding results
  • Oil water chemistry studies to improve models
  • Rock-fluid interactions analyses to assess subsidence
  • Reservoir simulation – sector model
  • Reservoir model based on fracture geomodel – partly history matched

Collaboration

Partner Institutions:

Other partners:


Technology Readiness Level

The Technology Readiness Level (TRL) scale is used to measure the maturity of a project. All technologies are evaluated on the same basis of Comparison, which provides a better overall picture. The first step on the scale is research still in the idea phase while step 7 is where the idea has matured into applicable technology.

Read more about how we use the TRL scale at DHRTC here