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- W4367673399 abstract "Reef deposits of the Upper Devonian oil fields in the north of the Perm Krai (Russia) are a primary hydrocarbon-bearing reservoir rock. This study provides new insights into carbonate reef reservoirs' sedimentation and formation processes. It also creates an essential basis for a large-scale and comprehensive analysis of carbonate reef reservoir properties. In this study, a comprehensive classification of rocks was performed using geological, petrophysical, and well-logging data. The rock types were determined based on the description and study of 250 core samples, including using X-ray microtomography, SEM, XRD, and XRF analysis. These integrated analyses allowed five facies to be identified: bioherm core, upper and lower parts of the deposit band, bordering the foot of the upland, shallow-marine facies, and reef slope. The cyclic nature of these carbonate deposits was identified, despite their identical mineralogical basis. The cyclicity of the deposits is shown by the structural features of the sediments of the various facies types and is controlled by the periodicity of tectonic movements and sedimentation processes. Lithological–facies maps were constructed for six cyclists of the productive Upper Devonian deposits of the Gagarinskoe field, which reflect the distribution of the main facies belts. The performed reservoir property analysis of the core samples made it possible to establish differences between different facies types; accordingly, the facies zonality of the reef reservoir and its relationship with reservoir properties were analyzed. Based on the results of the core sample study and geophysical studies of wells, the facies zonality of the reef reservoir of the Gagarinskoe field was determined. A detailed study of the void space of the core samples revealed various fracture types, including fractures mostly healed by calcite, which do typically not play a significant role in fluid filtration, and long and short fractures, which can considerably affect fluid filtration. The study of various fracture types and their impact on well productivity represents a key task for further research." @default.
- W4367673399 created "2023-05-03" @default.
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- W4367673399 date "2023-08-01" @default.
- W4367673399 modified "2023-10-06" @default.
- W4367673399 title "Evaluation of facies heterogeneity in reef carbonate reservoirs: A case study from the oil field, Perm Krai, Central-Eastern Russia" @default.
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- W4367673399 doi "https://doi.org/10.1016/j.geoen.2023.211814" @default.
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