Features of fluid dynamics in long-term heterogeneous gas reservoirs
Geological features are characterized by macro- and micro-heterogeneity, manifested by the spatial variability of material composition and lithophysical properties of rocks. This, in turn, determines the spatial and temporal variability of hydrocarbon (HC) fluid dynamics both during the reservoir for...
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| Format: | Article |
| Language: | English |
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National University of Science and Technology MISiS
2022-03-01
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| Series: | Горные науки и технологии |
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| Online Access: | https://mst.misis.ru/jour/article/view/327 |
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| author | Akper A. Feyzullayev Araz G. Gojayev Irada M. Mamedova |
| author_facet | Akper A. Feyzullayev Araz G. Gojayev Irada M. Mamedova |
| author_sort | Akper A. Feyzullayev |
| collection | DOAJ |
| description | Geological features are characterized by macro- and micro-heterogeneity, manifested by the spatial variability of material composition and lithophysical properties of rocks. This, in turn, determines the spatial and temporal variability of hydrocarbon (HC) fluid dynamics both during the reservoir formation and during its development and, subsequent operation as an underground gas storage facility (UGSF). The long-term operation of underground gas reservoirs at the Galmas and Garadagh areas in the South Caspian Basin (SCB), serving as a reservoir of commercial gas accumulations, and subsequent underground gas storage (UGSF) is characterized by significant peculiarities. Analysis of monitoring data on volumes of gas injection and extraction at the Galmas/Garadagh UGSF in the period of 2020–2021 showed their spatial variability, as well as the variability of wells deliverability during the gas reservoir development. This suggests the inherited nature of UGSF operation mode in relation to the gas reservoir development mode. The heterogeneous nature of spatial variability of these parameters is determined by the reservoir rock poroperm properties. A formation pressure drop during reservoir development is accompanied by decreasing rock permeability. When operating UGSF, the lithofacial properties of rocks determine the ratio of volumes of injected and extracted gas. In this regard, a necessary condition for selecting the optimal system of UGSF operation is to take into account the spatial heterogeneity of the underground reservoir. The irregular nature of variation of rock poroperm properties, the origination of isolated zones in the reservoir with considerable residual gas volumes, as well as unpredictable directions of fluid movement are the main reasons for decreased efficiency of field development and underground gas storage facility operation. In order to determine the optimal system of operation of UGSF in depleted underground oil and gas reservoirs, the features of the spacial variations resulting from the rocks poroperm properties need to be taken into account. |
| first_indexed | 2024-04-13T09:45:05Z |
| format | Article |
| id | doaj.art-cb1fd96e3cdf4d0db0b3168bcf1aa216 |
| institution | Directory Open Access Journal |
| issn | 2500-0632 |
| language | English |
| last_indexed | 2024-04-13T09:45:05Z |
| publishDate | 2022-03-01 |
| publisher | National University of Science and Technology MISiS |
| record_format | Article |
| series | Горные науки и технологии |
| spelling | doaj.art-cb1fd96e3cdf4d0db0b3168bcf1aa2162022-12-22T02:51:48ZengNational University of Science and Technology MISiSГорные науки и технологии2500-06322022-03-0171182910.17073/2500-0632-2022-1-18-29Features of fluid dynamics in long-term heterogeneous gas reservoirsAkper A. Feyzullayev0Araz G. Gojayev1Irada M. Mamedova2National Academy of Sciences of Azerbaijan, Baku, Republic of AzerbaijanGas Storage Facility Operation Department of “Azneft” Production Association, State Oil Company of the Azerbaijan Republic (SOCAR), Baku, Republic of AzerbaijanState Oil Company of Azerbaijan Republic (SOCAR), Baku, Republic of AzerbaijanGeological features are characterized by macro- and micro-heterogeneity, manifested by the spatial variability of material composition and lithophysical properties of rocks. This, in turn, determines the spatial and temporal variability of hydrocarbon (HC) fluid dynamics both during the reservoir formation and during its development and, subsequent operation as an underground gas storage facility (UGSF). The long-term operation of underground gas reservoirs at the Galmas and Garadagh areas in the South Caspian Basin (SCB), serving as a reservoir of commercial gas accumulations, and subsequent underground gas storage (UGSF) is characterized by significant peculiarities. Analysis of monitoring data on volumes of gas injection and extraction at the Galmas/Garadagh UGSF in the period of 2020–2021 showed their spatial variability, as well as the variability of wells deliverability during the gas reservoir development. This suggests the inherited nature of UGSF operation mode in relation to the gas reservoir development mode. The heterogeneous nature of spatial variability of these parameters is determined by the reservoir rock poroperm properties. A formation pressure drop during reservoir development is accompanied by decreasing rock permeability. When operating UGSF, the lithofacial properties of rocks determine the ratio of volumes of injected and extracted gas. In this regard, a necessary condition for selecting the optimal system of UGSF operation is to take into account the spatial heterogeneity of the underground reservoir. The irregular nature of variation of rock poroperm properties, the origination of isolated zones in the reservoir with considerable residual gas volumes, as well as unpredictable directions of fluid movement are the main reasons for decreased efficiency of field development and underground gas storage facility operation. In order to determine the optimal system of operation of UGSF in depleted underground oil and gas reservoirs, the features of the spacial variations resulting from the rocks poroperm properties need to be taken into account.https://mst.misis.ru/jour/article/view/327underground gas storage facilityreservoirrocksreservoir poroperm propertiesporositypermeabilityspatial heterogeneitygas-condensate reservoirfluid dynamicssouth caspian basin |
| spellingShingle | Akper A. Feyzullayev Araz G. Gojayev Irada M. Mamedova Features of fluid dynamics in long-term heterogeneous gas reservoirs Горные науки и технологии underground gas storage facility reservoir rocks reservoir poroperm properties porosity permeability spatial heterogeneity gas-condensate reservoir fluid dynamics south caspian basin |
| title | Features of fluid dynamics in long-term heterogeneous gas reservoirs |
| title_full | Features of fluid dynamics in long-term heterogeneous gas reservoirs |
| title_fullStr | Features of fluid dynamics in long-term heterogeneous gas reservoirs |
| title_full_unstemmed | Features of fluid dynamics in long-term heterogeneous gas reservoirs |
| title_short | Features of fluid dynamics in long-term heterogeneous gas reservoirs |
| title_sort | features of fluid dynamics in long term heterogeneous gas reservoirs |
| topic | underground gas storage facility reservoir rocks reservoir poroperm properties porosity permeability spatial heterogeneity gas-condensate reservoir fluid dynamics south caspian basin |
| url | https://mst.misis.ru/jour/article/view/327 |
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