Regulation of the water flooding process of gas condensate reservoirs by cyclic injection of carbon dioxide
The results of numerous studies prove the high efficiency of regulating the flow of formation water into productive reservoirs by injecting non-hydrocarbon gases near the initial gas contour. In order to improve the existing technologies for the development of fields in a water drive, a study of the...
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| Formato: | article |
| Lenguaje: | EN RU UK |
| Publicado: |
Ukrainian State Geological Research Institute (UkrSGRI)
2021
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| Materias: | |
| Acceso en línea: | https://doi.org/10.31996/mru.2021.3.28-32 https://doaj.org/article/127e99666fb04957994c257f20f3a9fb |
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| Sumario: | The results of numerous studies prove the high efficiency of regulating the flow of formation water into productive reservoirs by injecting non-hydrocarbon gases near the initial gas contour. In order to improve the existing technologies for the development of fields in a water drive, a study of the effectiveness of cyclic injection of carbon dioxide into a gas condensate reservoir was carried out. The study was conducted for varying carbon dioxide injection cycle times using Schlumberger’s Eclipse and Petrel simulation tools. According to the results of calculations, it was found that an increase in the duration of the injection cycle of carbon dioxide leads to a decrease in the duration of the development period of the reservoir until the moment of breakthrough of carbon dioxide. Rapid breakthrough of non-hydrocarbon gases into production wells results in shutdowns in order to maintain production gas condition to industry standards. This, in turn, leads to a decrease in the technological indicators of the development of a productive reservoir. However, analyzing the research results, it should be noted that the injection of carbon dioxide into the reservoir at the initial gas-water contact leads to a slowdown in the flow of formation water into the gas-saturated horizons. Based on the results of processing the calculated data, the optimal value of the duration of the cycle of injecting carbon dioxide into the reservoir was established, which is 7,89 months. The final gas recovery factor for the optimal value of the injection cycle time is 64,14 %, and in the case of depletion development – 54,31 %. The results of the studies carried out indicate the technological efficiency of injecting carbon dioxide into the productive reservoir on the vboundary of the initial gas-water contact in order to regulate the process of inflow of edge waters into gas-saturated horizons and increase the final gas recovery factor. |
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