The article describes laboratory studies aimed at researching various mechanisms of oil extraction at the fields of the Timan-Pechora oil and gas province. The results of the study of the influence of the heat-transfer medium temperature (water and steam) on the filtration properties of impermeable rocks of the Yaregskoye field are presented. The results of experiments indicate the effect of temperature on permeability.
The results of determining the relative permeability by unsteady-state method under various temperature regimes for the conditions of the Yaregskoye field are briefly described. It is shown that the relative permeability curves have a convex shape, which is associated with the peculiarities of filtration of high-viscosity oil. Comparative experiments on the displacement of three different surfactant solutions for three deposits in the Timan-Pechora province are described. By comparing the displacement coefficients, the most effective surfactant solution is determined for each deposit.
The authors present the results of experiments on the evaluation of the effectiveness of acid compositions for acid fracturing on core samples of the deposits of the Timan-Pechora oil and gas province. Based on the results of the filtration experiments, it was concluded that new approaches should be used to evaluate the effectiveness of formulations for acid fracturing.
References
1. Gavura A.V., Vlasov S.A., Krasnopevtseva N.V., Novye podkhody k probleme uvelicheniya nefteotdachi iz zalezhey nefti s karbonatnymi kollektorami (New approaches to the problem of increasing oil recovery from oil deposits with carbonate reservoirs), Proceedings of IV International Scientific Symposium “Teoriya i praktika primeneniya metodov uvelicheniya nefteotdachi plastov” (Theory and practice of applying enhanced oil recovery methods), Moscow, 18-19 September 2013, Moscow: Publ. of VNIIneft', 2013.
2. Johnson E.F., Bossler D.P., Naumann V.O., Calculation of relative permeability from displacement experiments, Trans. AIME, 1959, V. 216, pp. 61-63.
3. Jones S.C., Roszelle W.O., Graphical techniques for determining relative permeability from displacement experiments, Journal of Petroleum Technology, 1978, V. 30, pp. 807-817, DOI: 10.2118/6045-PA.
