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2 Prace Instytutu Nafty i Gazu

2 2008

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Udivitel’noe svojstvo emul’sij, igrausee vaznuu rol’ v potokootklonausih tehnologiah i pri glysenii skvazin

Ahmetov A. T.

Prace Instytutu Nafty i Gazu

2008

nr 150 wydanie konferencyjne

847--852

Successful use of return water oi1 emulsions by firm «Himeko-Gang» in stream rejecting technologies and at muffling of chinks on oilfields in Russia is caused by display of surprising effect of dynamic blocking. The essence of the effect is that the current of return water hydrocarbonic emulsion in areas of microchannels and cores fades in due course, despite constantly operating pressure difference. As а ru1e, rheological properties and results of experiments on linear models of а layer are found at the base of the oil-extracting technologies using emulsion. The liquid injecting in а chink at critical area of formation forms radially extending current and the radial component of speed is slowed down in process of removal from the centre. Therefore it is important to study features of transformation and movement of fluids at constant pressure differences. For аll types of emulsions studied by us the general has appeared the effect of dynamic blocking which is lost in the laboratory experiments spent on pumping with constant speed.

Perspektivi ispol’zovania elasticnoj turbulentnosti v tehnologiah izvlecenia nefti

Ahmetov A. T., Vasil'ev A. V., Mavletov M. V., Sametov S. P., Rahimov A. A., Vlasov S. A.

Prace Instytutu Nafty i Gazu

2008

nr 150 wydanie konferencyjne

867--871

In the flow of dilute high-weight polymer solutions in channels of variable cross-section elastic turbulence occurs at low Reynolds number increase of hydraulic resistance by several times in comparison with water is found. And viscosity of а solution only by 10-20% exceeds viscosity of water. This phenomenon is connected to appearance of elastic turbulence. On bulk models this phenomenon was studied by James and McLaren (1978), in channels of variable section — Kalashnikov V.N. (1987). We had conducted experiments in plane and bulk models of variable cross-section and in the complex structure of channels representing the cut of oil-bearing rock. А visual examination of the flow field was realized. The increase in hydraulic resistance in аll types of flow is revealed at low Reynolds number. Pulsations of structure of а flow with frequency of 5-10 Hz are discovered. Competent use of modes with elastic turbulenсе will allow to essentially raise the еfficiency of water-flooding in oi1 recovery.