ESTIMATION OF A RESERVOIR COVERAGE BY THE DEVELOPMENT SYSTEM USING THE DRAINING WELL RADIUS
Relevance of the research.In hydrodynamic simulators, fluid filtration is described using the laws of mass conservation, as a result of which it may turn out that a significant part of the development object is involved in the drainage process. This approach may not quite correctly assess the region...
| Main Authors: | , |
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2020-04-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/2609/2215 |
| Summary: | Relevance of the research.In hydrodynamic simulators, fluid filtration is described using the laws of mass conservation, as a result of which it may turn out that a significant part of the development object is involved in the drainage process. This approach may not quite correctly assess the region of fluid inflow to the producing well. The zones of fluid flow to the well (drainage zones) are often schematized as a circle concentric to the well with a radius equal to half the distance between the bottom of the wells. This approach does not take into account the difference in streamlines, reservoir boundaries, its heterogeneity and other factors. The value of the drainage radius is especially variable in carbonate reservoirs with changes in reservoir pressure. A reliable estimate of the size of the well drainage zone will make it possible to more accurately assess the extent of reservoir development, especially in the carbonate reservoir. The aim of the research isto investigate the possibility of oil field coverage by the development system by assessing the actual radius of well drainage;to determine the most effective technologies for increasing the radius of well drainage. Object: Bashkir deposit at the oil field in the Solikamsk depression. The average water cut of well production in the reservoir is 39,2%. There is a significant dependence of rock filtration parameters on reservoir and bottomhole pressures. Methods: determination of the values of the permeability coefficients and piezoconductivity based on processing the results of hydrodynamic studies. Results. At the current time, the oil reservoir is for 40% covered by development. The radius of drainage of wells is significantly affected by the permeability coefficient. At the object under consideration, a strong relationship between the permeability coefficient and the energy state of the reservoir was noted. Reducing the values of well drainage radii can significantly decrease the reservoir coverage by the development system and increase the terms of development of recoverable oil reserves. At the considered development object, the most effective methods for increasing well drainage radii are acid fractures and acid treatments combined with other technologies. |
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| ISSN: | 2500-1019 2413-1830 |