The presence of polymer molecules in an altered wettability core and its possible interactions with the solid phase is the subject of this study.

Experiments were carried out in Bentheimer sandstone which wettability is altered by an ageing process.

The wettability index after ageing (WI = 0.075) shows an intermediate wettability.

After ageing we carried out spontaneous imbibition tests by putting in contact the core with brine or polymer solution (HPAM, C = 2500ppm) or in a sequence (first with brine and then with the polymer solution)

For each experiment we measure the volume of oil recovered by spontaneous imbibition, this oil volume gives us an evaluation of the core wettability, the higher the recovered oil volume, the more water wet is the core. The experimental data show that final oil production by spontaneous imbibition is higher when the core was kept for a long time in contact with polymer solution rather than with brine. Moreover if the core is put in contact with polymer after having been immerged in brine, we notice a significant increment of produced oil. All these results confirm that the polymer has an interaction with the solid phase and makes the core more water wet.


Article metrics loading...

Loading full text...

Full text loading...


  1. Anderson, W.G.
    , Wettability Literature Survey-Part 2: Wettability measurement, JPT , November 1986.
    [Google Scholar]
  2. Amott, E.
    , Observations Relating to the Wettability of PorousRock; Trans., AIME, v.216, pp. 156–162, 1959.
    [Google Scholar]
  3. BarreauP., BertinH., LasseuxD., GlénatPh. & ZaitounA.
    : Water control in producing wells: influence of an adsorbed polymer layer on relative permeabilities and capillary pressure. SPE Reservoir Engineering, p 234–239, Nov. 1997.
    [Google Scholar]
  4. BrosetaD., Medjahed FLecourtier., J., and RobinM.
    , Polymer Adsorption/Retention in Porous Media: Effects of Core Wettability and Residual Oil, SPE24149, Advanced technology series Vol.3 No.1, 1995.
    [Google Scholar]
  5. De GennesP. G.
    , Reptation of a polymer chain in the presence of fixed obstacles. The Journal of Chemical Physics, Vol. 55, N°2, 572–579, (1971).
    [Google Scholar]
  6. Donaldson, E.C., Thomas, R.D. and Lorenz, P.B.
    Wettability Determination and Its Effect on Recovery efficiency, SPE J., March, 13–20, (1969)
    [Google Scholar]
  7. PeksaA.E. , WolfK.E., ZithaP.L.J.
    , Bentheimer sandstone revisited for experimental purposes, Marine and Petroleum Geology67701–719, (2015)
    [Google Scholar]
  8. SorbieK.S
    , Polymer-Improved Oil Recovery, CRC Press Inc., Boca Raton, FL., 1991
    [Google Scholar]
  9. WangD., JiechengC. , QingyanY., WenchaoG., QunL
    , Viscous-Elastic Polymer Can Increase Microscale Displacement Efficiency in Cores, SPE63227-MS Annual Technical Conference and Exhibition, 1–4 October, Dallas, Texas., 2000,
    [Google Scholar]
  10. WasanD. and NikolovA. D.
    Spreading of micellar fluids on solid surfaces. NATURE, Vol. 423, 156–159, (May 2003).
    [Google Scholar]
  11. ZhangH., NikolovA., and WasanD.
    , Enhanced Oil Recovery (EOR) Using Nanoparticle Dispersions:Underlying Mechanism and Imbibition Experiments. Energy Fuels, 28, 3002–3009, (2014).
    [Google Scholar]

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error