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1.1.4 Film residual oil

In natural hydrophobic layers combined water is distributed in inside pore space falteringly and occupies the centres of the largest pores. In a displacement process water mixes up with combined water, remaining in the largest pores.

Residual oil remains in small pores and on walls of large pores in the form of a continuous film and does not lose ability to the further movement. Unlike the adsorbed residual oil, film oil is practical residual oil as its values all time decrease in process of prorolling of the increasing quantity porovyh volumes of invading fluid [11].

In film oil there is a continuous flowing pressure which can be less capillary and consequently it is possible dootmyv film oil at increase in an operating hydrodynamic gradient. At high values of gradients of pressure oil from covers will leave, and values film IT decrease.

Film oil is typical and for breeds with the mixed type of wettability. At replacement of oil from such collectors small pores do not contain some the jammed oil. Besides, continuously moistened courses in large porovyh channels allow oil drenirovatsja in films along walls of pores, causing that small, but the limited permeability for oil is on very low, but not a zerolevel to very low values of a petrosaturation [28].

Laboratory replacement of oil by water was carried out on the natural cores possessing mixed wettability. Depressing of a residual petrosaturation is received at forcing of many porovyh water volumes. Dootmyv film oil it is not stopped even at prorolling 5000 porovyh water volumes.

The thickness of a film of oil on vnutriporovoj surfaces depends on petroleum composition, invading water, conditions of replacement and mineral composition of a skeleton,

In real porous mediums, obviously, the type of wettability of system is defining.

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A source: Kozhabergenov Murat Mokanovich. Substantiation of effective technologies doizvlechenija residual oil from obvodnennyh layers on an example of XIII horizon of deposit Uzen: Dis.... A Cand.Tech.Sci.: 25.00.17. - M: RGB, 2006. 2006

More on topic 1.1.4 Film residual oil:

  1. 1.1.2 Is capillary-jammed residual oil
  2. 1.1 Kinds of residual oil in zavodnennyh layers
  3. 1.1.6 Residual oil at unstable replacement
  4. 1.1.3 Adsorbed residual oil
  5. 1.2 Quantitative distribution of residual oil on the deposit area
  6. 1.3 Distribution of residual oil of water in emptiness of hydrophilic and hydrophobic collectors
  7. 1.1.5 Residual oil in deadlock pores and micronon-uniform zones
  8. 2.7 Bases of technology doizvlechenija residual oil from obvodnennyh chinks
  9. 2.6. Laboratory researches of possibility doizvlechenija micro-residual oil after zavodnenija for conditions of layers of XIII horizon of deposit Uzen
  10. CHAPTER 1 MODERN REPRESENTATIONS ABOUT RESIDUAL OIL In DEPOSITS AFTER THEM ZAVODNENIJA
  11. Kozhabergenov Murat Mokanovich. the Substantiation of effective technologies doizvlechenija residual oil from obvodnennyh layers on an example of XIII horizon of deposit Uzen: Dis.... A Cand.Tech.Sci.: 25.00.17. - M: RGB,, 2006 2006
  12. temperature dependences of residual polarisation
  13. residual voltages in a blanket of details at PPD
  14. 3.2. Residual voltages as a result of surface deformation