1. Matrix Formation Damage Model Reviews Particle Invasion. Oil Droplet Invasion. Invasion Of HydroCarbon “Solids”. ScalingCorrosion Bacterial Growth Formation Fracturing Particle Invasion. Oil Droplet Invasion. Invasion Of HydroCarbon “Solids”. ScalingCorrosion Bacterial Growth Formation Fracturing

2. Particle Invasion Particle Deposition on Grains Particle Bridging External Accumulation Internal Accumulation

3. Oil Droplet Invasion n Pore blocking of droplets. n Perm reduction due to wettability change. n Pore blocking of droplets. n Perm reduction due to wettability change.

4. Invasion of Hydrocarbon Solids n Wax Deposition. n Asphaltene Deposition. n Alaska “Schmuu”. n Wax Deposition. n Asphaltene Deposition. n Alaska “Schmuu”.

5. ScalingScaling n Calcium Carbonate. n Calcium Sulphate. n Barium Sulphate & Strontium Sulphate. n Calcium Carbonate. n Calcium Sulphate. n Barium Sulphate & Strontium Sulphate.

6. Bacterial Growth n Sulphate Reducing Bacteria. n Slime Forming Bacteria. n Iron Bacteria n Sulphate Reducing Bacteria. n Slime Forming Bacteria. n Iron Bacteria

7. Formation Damage Models n “Original” or General Models. n Shell Models. –Barkman and Davidson[Barkman, 1972]. –Eylander [Eylander, 1988 ]. –Van Velzen et al. [van Velzen, 1992 ]. –Van Ort et al. [van Oort, 1993 ]. –Khatib [Khatib, 1994 ]. n University of Texas Models. n Hariot-Watt University Models. n The IFP Models. n “Original” or General Models. n Shell Models. –Barkman and Davidson[Barkman, 1972]. –Eylander [Eylander, 1988 ]. –Van Velzen et al. [van Velzen, 1992 ]. –Van Ort et al. [van Oort, 1993 ]. –Khatib [Khatib, 1994 ]. n University of Texas Models. n Hariot-Watt University Models. n The IFP Models.

8. n All the models describe special cases. n Yet, none of the models can describe realistically the whole PWRI process. n Best practice guidelines based on lessons learned and experience may be the current best practical option for PWRI. (The PEA-23 Correlation is a start) n All the models describe special cases. n Yet, none of the models can describe realistically the whole PWRI process. n Best practice guidelines based on lessons learned and experience may be the current best practical option for PWRI. (The PEA-23 Correlation is a start) ConclusionConclusion

9. HWU Reports Matrix Formation Damage Models Review. Injectivity Decline Models Review. Wellbore Hydraulics (Jointly with Terratek). Injection Monitoring Review. Application of the Hall Plot Method. Core Testing Best Practice Review (Newsletter). Matrix Data Analysis. Matrix Formation Damage Models Review. Injectivity Decline Models Review. Wellbore Hydraulics (Jointly with Terratek). Injection Monitoring Review. Application of the Hall Plot Method. Core Testing Best Practice Review (Newsletter). Matrix Data Analysis.