Northern East Siberia

This Report provides data on geology of a vast region of the northern East Siberia including the east part of the Yenisei-Khatanga Basin, Anabar-Khatanga Saddle and the Anabar-Lena Basin and adjacent parts of the Olenek Fold Belt, Verkhoyansk Fold and Thrust Belt, and East Siberian Craton. This region is known by the first oil discovery in Siberia in 1940s, but commercial reserves remain to be found.
The main data sources used in this study were publically accessible Soviet-era geological reports and publications. In addition, we provide new proprietary analytical results of U-Pb detrital zircon geochronology (14 samples), whole-rock Sm-Nd isotope geochemistry (16 samples), whole-rock geochemistry (95 samples), detrital garnet chemistry (10 samples), Apatite Fission Track study (10 samples) and RockEval study (42 samples) acquired using state-of-art technologies. The new analytical data helped to constrain geological interpretations.
The Report consists of 187 pages including 59 illustrations. It is accompanied by 26 attachments and an ArGIS database that includes geological and tectonic maps of the studied region, paleogeographic and organic matter composition and maturity maps, locations of the cross-sections, sampled sites etc

Table of Contents

EXECUTIVE SUMMARY
1.   INTRODUCTION
2.   GEOLOGICAL OVERVIEW
2.1. Geological framework
2.2. Regional tectonics
2.3. Magmatic rocks
3.   REGIONAL LITHOSTRATIGRAPHY
3.1. Meso- and Neoproterozoic
3.2. Vendian (uppermost Neoproterozoic)
3.3. Cambrian
3.4. Ordovician
3.5. Silurian
3.6. Devonian
3.7. Carboniferous
3.8. Permian
3.9. Triassic
3.10. Jurassic
3.11. Cretaceous
3.12. Paleogene
3.13. Neogene
3.14. Quaternary
4.   SEDIMENT PROVENANCE AND PALEOGEOGRAPHY
4.1. Sediment provenance
   4.1.2. U-Pb detrital zircon study
   4.1.2. Sm-Nd whole-rock isotopic study
   4.1.3. Whole-rock geochemistry
   4.1.4. Heavy minerals study
4.2. Paleogeography
   4.2.1. Cambrian
   4.2.2. Ordovician
   4.2.3. Silurian
   4.2.4. Devonian
   4.2.5. Carboniferous
   4.2.6. Permian
   4.2.7. Triassic
   4.2.8. Jurassic
   4.2.9. Cretaceous
4.2.10. Cenozoic
5.   PETROLEUM GEOLOGY
5.1. Discovered hydrocarbon fields and occurrences
   5.1.1. Yenisei-Khatanga Province
   5.1.2. Anabar-Lena Province
5.2. Potential hydrocarbon source rocks
   5.2.1. Yenisei-Khatanga Basin
   5.2.2. Anabar-Khatanga Saddle
   5.2.3. Anabar-Lena Basin and Northern Priverkhoyansk Foreland Basin
5.3. Potential hydrocarbon plays
   5.3.1. Yenisei-Khatanga Basin
   5.3.2. Northern Margin of the Siberian Craton
   5.3.3. Anabar-Khatanga Saddle
   5.3.4. Anabar-Lena Basin and Northern Priverkhoyansk Foreland Basin
5.4. Traps
   5.4.1. Yenisei-Khatanga Province
   5.4.2. Anabar-Lena Province
5.5. Rock-Eval results
6.   CONCLUSION
7.   REFERENCE LIST

Attachments

ATTACHMENT 1. Location Map of the Northeastern Siberia (1 sheet)
ATTACHMENT 2. List of Samples (13 pages)
ATTACHMENT 3. Composite cross-sections (6 sheets)
ATTACHMENT 4. Apatite Fission Track Study (121 page)
ATTACHMENT 5. Legend for the key stratigraphic sections in Attachments 6 – 14 (1 sheet)
ATTACHMENT 6. Correlation panel of key Riphean sections (7 stratigraphic columns in 1 sheet)
ATTACHMENT 7. Correlation panel of key Vendian sections (9 stratigraphic columns in 1 sheet)
ATTACHMENT 8. Correlation panel of key Cambrian sections (6 stratigraphic columns in 1 sheet)
ATTACHMENT 9. Ordovician to Silurian section of the Ust' Olenek-2370 Well (1 sheet)
ATTACHMENT 10. Correlation panel of key Carboniferous sections (2 stratigraphic columns in 1 sheet)
ATTACHMENT 11. Correlation panel of key Permian sections (17 stratigraphic columns in 3 sheets)
ATTACHMENT 12. Correlation panel of key Triassic sections (21 stratigraphic columns in 2 sheets)
ATTACHMENT 13. Correlation panel of key Jurassic sections (22 stratigraphic columns in 2 sheets)
ATTACHMENT 14. Correlation panel of key Cretaceous sections (17 stratigraphic columns in 2 sheets)
ATTACHMENT 15. Sandstone petrography (36 thin-section photographs in 4 sheets)
ATTACHMENT 16. U-Pb detrital zircon study (258 pages)
ATTACHMENT 17. Sm-Nd isotopic study (1 page)
ATTACHMENT 18. Whole-rock geochemistry (16 pages)
ATTACHMENT 19. Detrital garnet chemistry (22 pages)
ATTACHMENT 20. RockEval study (2 pages)
ATTACHMENT 21. Tectonic map of the Eastern Yenisei-Khatanga Basin and Northeastern Siberia (1 sheet)
ATTACHMENT 22. Map of petroleum provinces, hydrocarbon occurrences, and mapped leads and prospects of the Yenisei-Khatanga Basin and Northeastern Siberia (1 sheet)
ATTACHMENT 23. Maps of organic matter types in Upper Permian, Triassic, and Lower Jurassic sedimentary rocks (5 maps in 1 sheet)
ATTACHMENT 24. Maps of organic matter types Middle-Upper Jurassic and Lower Cretaceous sedimentary rocks (6 maps in 1 sheet)
ATTACHMENT 25. Maps of TOC content in Permian, Triassic, Jurassic and Lower Cretaceous sedimentary rocks (7 maps in 1 sheet)
ATTACHMENT 26. Maps of organic matter maturity in Lower Triassic, Jurassic and Lower Cretaceous sedimentary rocks (4 maps in 1 sheet)

List of Illustrations

FIGURE 1.1. Location map of the study area in the northern East Siberia.
FIGURE 2.1. Tectonic setting of the study area.
FIGURE 2.2. Geologic map of the northern East Siberia.
FIGURE 2.3. Tectonic map of the eastern Yenisei-Khatanga Basin and Northern Siberia.
FIGURE 2.4. Tectonic domains of the East Siberian Craton basement.
FIGURE 2.5. Regional geological cross-section through the Anabar-Lena Basin.
FIGURE 2.6. Regional geological cross-section via the eastern part of the Olenek Fold Belt and adjacent Anabar-Lena Basin.
FIGURE 2.7. Regional geological cross-section through central part of the eastern Yenisei Khatanga Basin.
FIGURE 2.8. HeFTy thermal evolution models for samples from the Anabar-Lena and Yenisei-Khatanga basins.
FIGURE 3.1. Approximate relationship between Russian and International stratigraphic scales for the upper Proterozoic.
FIGURE 3.2. Stratigraphic chart of the Riphean and Vendian successions of the Northern and Northeastern Siberia.
FIGURE 3.3. Geo-seismic cross-section located to the east of the Olenek High.
FIGURE 3.4. Stratigraphic chart of Cambrian successions of the Northern and Northeastern Siberia.
FIGURE 3.5. Stratigraphic chart of Permian successions of the Northern and Northeastern Siberia.
FIGURE 3.6. Stratigraphic chart of Triassic successions of the Northern and Northeastern Siberia.
FIGURE 3.7. Stratigraphic chart of Jurassic successions of the Northern and Northeastern Siberia.
FIGURE 3.8. Stratigraphic chart of Cretaceous succession of the Northern and Northeastern Siberia.
FIGURE 4.1. Relative age probability distribution plots for detrital zircon grains from Permian to Cretaceous siliciclastic rocks in the Anabar-Lena Basin.
FIGURE 4.2. Relative age probability distribution plots for detrital zircon grains from Permian to Cretaceous siliciclastic rocks in the Yenisei-Khatanga Basin.
FIGURE 4.3. Relative age probability distribution plots for detrital zircon grains from the Anabar-Lena Basin samples.
FIGURE 4.4. Relationship between shape and age of detrital zircon grains from the Anabar-Lena Basin samples.
FIGURE 4.5. Sm-Nd isotopic system in Carboniferous to Cretaceous siliciclastic rocks from the Anabar-Lena and Yenisei-Khatanga basins.
FIGURE 4.6. Th/Sc vs. Zr/Sc diagram.
FIGURE 4.7. Th/Sc vs. Eu/Eu* diagram.
FIGURE 4.8. Rare earth elements pattern in the Riphean (Mesoproterozoic) to Cretaceous siliciclastic rocks in the Anabar-Lena Basin.
FIGURE 4.9. Rare earth elements diagrams in the Riphean (Mesoproterozoic) to Cretaceous siliciclastic rocks in the Yenisei-Khatanga Basin.
FIGURE 4.10. Diagrams of detrital garnet grains distribution in a sandstone samples from the Chucha Cape.
FIGURE 4.11. Diagrams of detrital garnet grains distribution in sandstone samples from the Govorov well.
FIGURE 4.12. of detrital garnet grains distribution in a Permian sandstone sample from the Khastakh well.
FIGURE 4.13. Diagrams of detrital garnet grains distribution in a Jurassic sandstone sample from the Kubalakh well.
FIGURE 4.14. Diagrams of detrital garnet grains distribution in sandstone sample from the Volochansk well.
FIGURE 4.15. Cambrian paleogeography of the Eastern Siberia.
FIGURE 4.16. Location of late Devonian rifts in the eastern margin of the East Siberin Craton.
FIGURE 4.17. Schematic paleogeographic map for Carboniferous time (a), and Relative age probability distribution plots for detrital zircons from the Carboniferous rock of Kharaulakh Ridge (b)
FIGURE 4.18. Schematic paleogeographic map for Early Permian time.
FIGURE 4.19. Permian provenance map.
FIGURE 4.20. Schematic paleogeographic map for Induan (Early Triassic) time.
FIGURE 4.21. Schematic paleogeographic map for Ladinian (Middle Triassic) time.
FIGURE 4.22. Schematic paleogeographic map for Rhaetian (Late Triassic) time.
FIGURE 4.23. Triassic provenance map.
FIGURE 4.24. Schematic paleogeographic map for Toarcian (Early Jurassic) time.
FIGURE 4.25. Schematic paleogeographic map for Callovian (Middle Jurassic) time.
FIGURE 4.26. Schematic paleogeographic map for Tithonian (Late Jurassic) time.
FIGURE 4.27. Jurassic provenance map.
FIGURE 4.28. Schematic paleogeographic map for Hauterivean (Early Cretaceous) time.
FIGURE 4.29. Cretaceous provenance map.
FIGURE 4.30. Schematic paleogeographic map for Paleogene (Eocene?) time.
FIGURE 5.1. Exploration areas for oil and gas (black rectangles) in the eastern Yenisei-Khatanga Basin and Anabar-Khatanga Saddle.
FIGURE 5.2. Map and a cross-section of the Balakhninsk Gas Condensate Field.
FIGURE 5.3. Map and a cross-section of the Yuzhno-Tigyan Oil Field.
FIGURE 5.4. Map and a cross-section of the Nordvik Oil-and-Gas Field.
FIGURE 5.5. Lithostratigraphy and hydrocarbon play elements of the eastern Yenisei–Khatanga Basin and Anabar-Khatanga Saddle.
FIGURE 5.6. Composite lithostratigraphy and hydrocarbon systems of the Yenisei-Khatanga Province.
FIGURE 5.7. Source rock maturity model for the eastern Yenisei–Khatanga Basin and Anabar-Khatanga Saddle.
FIGURE 5.8. Play element chart for the Precambrian, Cambrian and Permian successions of the Anabar-Lena region.
FIGURE 5.9. Play element chart for the Triassic, Jurassic and Lower Cretaceous successions of the Anabar-Lena area.
FIGURE 5.10. Map showing location of the RockEval samples (black solid circles) and their stratigraphic age.
FIGURE 5.11. The Hydrogen Index vs. Tmax diagram (Gorin and Feist-Bukhardt, 1990) for the analyzed source rocks.
FIGURE 5.12. The Hydrogen Index vs. Tmax diagram (Isaksen and Ledje, 2001) for the analyzed source rocks.

GEOLOGY AND HYDROCARBON SYSTEMS OF THE NORTHERN SIBERIA

A Regional Study Report

GEOLOGY AND HYDROCARBON SYSTEMS OF THE NORTHERN SIBERIA

​A Regional Study Report

A Regional Study Report