Study on influence of two-phase filtration transformation on formation of zones of undeveloped oil reserves
- 1 — Tyumen Industrial University
- 2 — Tyumen Industrial University
- 3 — Tyumen Industrial University
Abstract
In order to study the process of fluid filtration during flooding of an oil field, article uses Rapoport – Lis model of non-piston oil displacement by water. During plane-radial filtration in a homogeneous formation, radii of disturbance zones are determined with and without taking into account the end effect. Influence of changes in value of capillary pressure gradient on distribution of water saturation coefficient in the non-piston displacement zone for high and low permeability reservoirs is revealed. Application of an element model for a five-point injection and production well placement system showed that, using traditional flooding technology, flat-radial fluid filtration is transformed into rectilinear-parallel. At solving equation of water saturation, Barenblatt method of integral relations was used, which allows determining the transformation time. By solving the saturation equation for rectilinear-parallel filtration, change in the value of water saturation coefficient at bottomhole of production well for an unlimited and closed deposit is determined. It is shown that an increase in water cut coefficient of a production well is possible only for a closed formation. To determine coefficient of water saturation in a closed deposit, a differential equation with variable coefficients is obtained, an iterative solution method is proposed. In the element of the five-point system, oil-saturated zones not covered by development were identified. For channels of low filtration resistance, conditions for their location in horizontal and vertical planes are established. It is shown that, at maintaining formation pressure, there is an isobar line in formation, corresponding to initial formation pressure, location of which determines direction of fluid crossflow rates. Intensity of crossflows affects application efficiency of hydrodynamic, physical and chemical, thermal and other methods of enhanced oil recovery.
References
- Barenblatt G.I., Entov V.M., Ryzhik V.M. Movement of liquids and gases in natural formations. Мoscow: Nedra, 1984, p. 211 (in Russian).
- Zheltov Yu.P. Oil fields development. Мoscow: Nedra, 1998, p. 365 (in Russian).
- Zozulya G.P., Kuznetsov N.P., Yagafarov A.K. Physics of oil and gas formation. TyumGNGU. Tyumen, 2006, p. 244 (in Russian).
- Kanevskaya R.D. Mathematical modeling of hydrodynamic processes of hydrocarbon field development. Мoscow-Izhevsk: Institut kompyuternykh issledovanii, 2002, p. 140 (in Russian).
- Korotenko V.A., Grachev S.I., Kryakvin A.B. Interpretation of the Tracer Investigation Results Considering Convective Mass Transfer. Zapiski Gornogo instituta. 2019. Vol. 236, p. 185-193. DOI: 10.31897/PMI.2019.2.185 (in Russian).
- Korotenko V.A., Kushakova N.P. Features of filtration and oil displacement from abnormal reservoirs. Tyumenskii industrialnyi universitet. Tyumen, 2018, p. 150 (in Russian).
- Kreig F.F. Oil fields development with flooding: Per. s angl. / Ed. by V.L.Danilova. Мoscow: Nedra, 1974, p. 192 (in Russian).
- Maksimov M.I. Geological fundamentals of oil fields development. Мoscow: Nedra, 1975, p. 534 (in Russian).
- Masket M. Physical fundamentals of oil production technology. Мoscow-Izhevsk: Institut kompyuternykh issledovanii, 2004, p. 606 (in Russian).
- Nikolaevskii V.N., Basniev K.S., Gorbunov A.T., Zotov G.A. Mechanics of saturated pore media. Мoscow: Nedra, 1970, p. 336 (in Russian).
- Mirzadzhanzade A.Kh., Ametov I.M., Kovalev A.G. Physics of oil and gas formation. Мoscow-Izhevsk: Institut kompyuternykh issledovanii, 2005, p. 280 (in Russian).
- Mikhailov N.N. Residual oil saturation of developed formations. Мoscow: Nedra, 1992, p. 270 (in Russian).
- Nikolaevskii V.N. Mechanics of porous and fractured media. Мoscow: Nedra, 1984, p. 232 (in Russian).
- Basniev K.S., Vlasov A.M., Kochina I.N., Maksimov V.M. Underground hydraulics. Мoscow: Nedra, 1986, p. 303 (in Russian).
- Telkov A.P, Grachev S.I. Formation hydromechanics as applied to oil and gas field development tasks with inclined and horizontal wellbores. St. Petersburg: Nauka, 2012, p. 160 (in Russian).
- Telkov A.P., Grachev S.I. Formation hydromechanics as applied to oil and gas field development tasks: In 2 parts. TyumGNGU. Tyumen, 2009. Part 1, p. 240 (in Russian).
- Korotenko V.A., Grachev S.I., Kushakova N.P., Sabitov R.R. Transformation of filtration processes in development of hydrocarbon deposits. Uspekhi sovremennogo estestvoznaniya. 2017. N 2, p. 86-93 (in Russian).
- Shchelkachev V.N. Development of oil formations in elastic mode. Мoscow: Gostoptekhizdat, 1959, p. 467 (in Russian).
- Citation Indexes: 18
- Readers: 4
