Sakhalin III, Blocks 1 and 2

Evaluation of Hydrocarbon

Resource Potential

(2006)

A Dalmorneftegeophysika Study

Table of Contents

INTRODUCTION

• Physical and geographical essay

• Geological and geophysical database

STRATIGRAPHY

1. Stratigraphic tie of seismic horizons

2. Acoustic basement

3. Eocene-Middle Miocene

4. Middle-Late Miocene

PALEOFACIES

• Upper Dagi

• Okobykay

• Lower Nutov

• Upper Nutov

MAIN STRUCTURAL ELEMENTS

• North Sakhalin trough

• Odoptu anticlinal zone

• Bautin anticlinal zone

• Chaivo synclinal zone

PETROLEUM GEOLOGY

• Hydrocarbon fields

  • Odoptu offshore oil and gas-condensate field

  • Piltun-Astokh oil and gas-condensate field

  • Chaivo oil and gas-condensate field

  • Arkutun-Dagi oil and gas-condensate field

  • Ust Tomi gas-condensate field

OIL SOURCE ROCKS

• Geochemical characteristics of oil source rocks

• Distribution of oil source strata

RESERVOIRS

• Reservoir types

HYDROCARBON TRAP TYPES

GEOPHYSICAL Hydrocarbon Indicators

RESOURCE EVALUATION

• East Odoptu block (Sakhalin III, Block 1): estimation parameters

  • East Odoptu

  • Lozin

  • South Lozin

  • Shivchibin

• Ayashsky block (Sakhalin III, Block 2):  estimation parameters

  • Bautin

  • Ayashsky

  • Ayashsky-South Ayashsky

  • South Ayashsky

  • West Ayashsky

  • East Ayashsky

PETROLEUM SYSTEMS MODELING

CONCLUSIONS

Total Resources by block

REFERENCES

STUDY EXHIBITS

FIGURES

• Study area index map

• Stratigraphic correlation - northeast Sakhalin

• Distribution of lithofacies, Uynin-Dagi

• Distribution of lithofacies, Okobykay-Nutov

• Distribution of lithofacies,  Pomyr-Deryugin

• Structural-tectonic map

• Distribution of oil source rocks, Uynin-Dagi

• Distribution of oil source rocks, Okobykay-Nutov

• Hydrocarbon generation and migration curves

• Geological-geophysical section on line I-I

• Geological-geophysical section on line II-II

• Potential reservoir beds, Uynin-Dagi

• Potential reservoir beds, Okobykay-Nutov

• Potential reservoir beds, Pomyr-Deryugin

• East Odoptu trap - Lower Nutov layer XXI

• East Odoptu trap (seismic line 1186-1634)

• East Odoptu trap (seismic line CGG-42)

• Lozin trap, Lower Nutov layer XXI

• Lozin trap (seismic line CGG-22)

• South Lozin trap, Lower Nutov layer XXI

• South Lozin trap (seismic line 1378-579)

• Shivchibin trap at top Uynin-Dagi

• Shivchibin trap (seismic line CGG-15)

• Bautin trap, Lower Nutov layer XXI

• Bautin trap (seismic lines 1378-597/616)

• West Ayashsky lith trap (seismic line 2089-45)

• Ayashsky group, lower part Lower Nutov "a"

• Ayashsky lith trap (seismic line 2089-52)

• Ayashsky group middle part Lower Nutov

• Ayashsky group, upper part Lower Nutov

• Line 1991-14. Lithologic model

• Line 1991-14. Burial history model

• Line 1991-14. Thermal regime model

• Line 1991-14. Vitrinite reflectance model

• Line 1991-14. Hydrocarbon generation potential

• Line 1991-14. Hydrocarbon migration model

• Line 1991-14. Hydrocarbon saturation model

TABLES

• Geological and geophysical database of tender area

• Geochemical data, SOM and hydrocarbon composition, Okobykay-Nutov, Arkutun #1

• Geochem, Nutov section, NE Sakhalin shelf

• Extract A (chloroform bitumoid) in the productive intervals of Piltun-Astokh and Arkutun-Dagi fields

• SOM in producing beds of Nutov horizon offshore

• Oil and gas prospects of tender area

• Prospective traps, Block 1

• Block 1: Oil resources and parameters, С₃-D₁

• Block 1: Gas resources and parameters, С₃-D₁

• Prospective traps, Block 2

• Block 2: Oil resources and parameters, С₃-D₁

• Block 2: Oil resources and parameters, С₃-D₁

ENCLOSURES

• Geological and geophysical database map

• Depth structure map, top basement

• Depth structure map, horizon 6, top Uynin-Dagi

• Depth structure map, Layer XXI, Lower Nutov

• Depth structure map, horizon 4, top Lower Nutov

• Depth structure map, horizon 2, top Upper Nutov

• Isopach map, sedimentary cover

• Isopach map: Paleogene and Uynin-Dagi

• Isopach map: Nutov and Okobykay

• Isopach map: Lower part Lower Nutov and Okobykay (horizon 6 to layer XXI)

• Isopach map: Mid Lower Nutov (layer XXI to hor 4)

• Isopach map: Upper Nutov and upper Lower Nutov (horizon 4 to 2)

• Isopach map: Pomyr-Deryugin sequence

• Paleofacies map: Top Uynin-Dagi (horizon 6)

• Paleofacies map: Top Okobykay (horizon 5a)

• Paleofacies map: Odoptu layer XXI

• Paleofacies map: Top Upper Nutov (horizon 2)

• Seismic line 2089-39: Dagi #1 well tie

• Composite seismic: lines 78822 (onshore), 2092-23 and 2089-43: Ust Tomi #9 well tie

• Seismic section, line 2089-52

• Seismic section, line CGG-15

• Seismic section, line CGG-22

• Composite seismic: lines 259A (onshore), CGG-24: E Paromay and Piltun-Astokh #13 well ties

• Seismic section CGG-42

• Seismic section CGG-43

• Seismic section 1991-14 (Piltun-Astokh #7 well tie)

• Seismic section 1378-597/616

• Migrated seismic section 9100-4

• Seismic section 9100-6: Odoptu #1 well tie

• Seismic section 1378-612

• Seismic section CGG-188

• Seismic section 1378-579

• Composite seismic: 488-68 (onsh), 1890-57, CGG-177, CGG-33: Torrokh #1, S Odoptu #3 well ties

• Composite seismic section, lines 26A (onshore) and CGG-28: tie to Odoptu #11 well

• Composite seismic: Line 131, 286-68 (onsh), 10: Ust Evay field tie

• Stratigraphic correlation, key wells - Sakhalin III

• Geological-geophysical section: Ust Evay #1

• Geological-geophysical section: Odoptu (offsh) #1

• Paleofacies map: Lower Nutov sequence N21 nt1a

• Paleofacies map: Lower Nutov sequence N21 nt1b

• Index map: Sakhalin III area prospects

• AVO analysis – line 9100-9

• AVO analysis – line 9100-3А

• AVO analysis – line 2192-019

• AVO analysis – line 2192-110

• AVO analysis – line 2192-117