Express predicting movement of displacement front to high viscosity oil reservoirs
Practically in all oil fields water injection is performed to maintain formation pressure. At bottom holes of injection wells pressures are created which significantly exceed formation pressure. In case of significant layer to layer heterogeneity water from injection wells will start flowing through...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Perm National Research Polytechnic University
2019-06-01
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| Series: | Perm Journal of Petroleum and Mining Engineering |
| Subjects: | |
| Online Access: | http://vestnik.pstu.ru/get/_res/fs/file2.pdf/8658/Express+predicting+movement+of+displacement+front+to+high+viscosity+oil+reservoirsfile2.pdf |
| Summary: | Practically in all oil fields water injection is performed to maintain formation pressure. At bottom holes of injection wells pressures are created which significantly exceed formation pressure. In case of significant layer to layer heterogeneity water from injection wells will start flowing through low filtration resistance channels to productive wells. In the most intense way movement of injection water from injection well to productive well manifests itself in high viscosity oil reservoirs. In case of productive well water flooding works on water shutoff and equalizing input profiles are performed. To evaluate time of water breakthrough from productive well to injection well using software suite TempestMore a series of mathematic experiments was made to forecast displacement front movement in formation with different formation oil viscosities, reservoir permeability, bottom hole pressures in injection and productive well. Information on fluid properties and relative permeability at fields of Nozhovskaya group (Perm territory) was used. According to results of generalization of simulation data an equation for evaluation of time of displacement front movement in reservoir is obtained. Analyzing calculation results, it is possible to conclude that time of displacement front movement for certain distance is influenced by mobility coefficient according to exponential dependency. In reservoirs with mobility over 2 μm2/Pa*sec water-oil front moves with velocity of around 1 m/day. Comparison of forecasted values of production wells water flooding time for high viscosity oil reservoir obtained by hydrodynamic simulation and equation developed demonstrates high enough results reproducibility. Usage of the equation will permit to plan in advance measures on well water shutoff and equalizing input profiles. |
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| ISSN: | 2224-9923 2305-1140 |