G.G. Shemin, V.A. Vernikovskii, N.V. Pervukhina, E.V. Deev, M.Yu. Smirnov
 
Common factors of porosity and permeability variations in regional reservoirs depending on depth of their occurrence in the Jurassic series of the Arctic regions of West Siberian and Khatanga-Vilyuisky petroleum provinces
DOI 10.31087/0016-7894-2019-5-61-71

Basing on the analysis of large analytical material, the paper presents the results of studies of reservoir properties and determination of their common factors depending on depth of granular reservoirs occurrence in the regional Jurassic reservoirs of the Arctic regions of West Siberian and Khatanga-Vilyuisky petroleum provinces. Stratigraphic position of Oxfordian, Bathonian, Aalenian-Bajocian, Toarcian, Pliensbachian, and Hettangian-Sinemurian regional reservoirs and their constituent parts (permeable series and impermeables) is discussed. Characteristics of reservoir properties of permeable series in regional reservoirs are presented. Among the regional reservoirs, Oxfordian and Bathonian series have the highest quality; Aalenian-Bajocian and Toarcian reservoirs have the lower quality; Pliensbachian and Hettangian-Sinemurian collectors have the lowest quality. Common features of reservoir quality variations depending on their depth of occurrence are considered. The deeper the reservoirs occur, the lower open porosity and intergranular permeability they possess. Porosity of Jurassic reservoirs decreases with depth by 2 to 2.5 % every 1000 m. Starting from the depth of 4500 m, porosity does not exceed 12–13 %; reservoirs deeper than 5000–5500 m have porosity close to their cutoff. Reservoir permeability decreases from the top down the section from the interval with its medium value (2.68–8.18)·10−3 μm2 at 2000–2550 m to (0.67–0.69)·10−3 μm2 at 4000–4250 m. The cause of reservoir properties worsening depending on depth of their occurrence is explained. Decrease in reservoir properties with depth of occurrence responds to many factors, and rocks compaction because of overburden load is the main of them.

Key words: regional pool; permeable series; reservoir; reservoir quality; porosity; permeability; West Siberian and Khatanga-Vilyuisky petroleum provinces.

For citation: Shemin G.G., Vernikovskii V.A., Pervukhina N.V., Deev E.V., Smirnov M.Yu. Common factors of porosity and permeability variations in regional reservoirs depending on depth of their occurrence in the Jurassic series of the Arctic regions of West Siberian and Khatanga-Vilyuisky petroleum provinces. Geologiya nefti i gaza. 2019;(5):61–71. DOI: 10.31087/0016-7894-2019-5-61-71.

References

1. Gurari F.G., Devyatov V.P., Demin V.I., Ekhanin A.E., Kazakov A.M., Kasatkina G.V., Kurushin N.I., Mogucheva N.K., Sap'yanik V.V., Serebrennikova O.V., Smirnov L.V., Smirnova L.G., Surkov V.S., Sysolova G.G., Shiganova O.V. Geological structure and hydrocarbon potential of Lower-Middle Jurassic in the West Siberian Province [Geologicheskoe stroenie i neftegazonosnost' nizhnei-srednei yury Zapadno-Sibirskoi provintsii]. Novosibirsk: Nauka; 2005. 156 p.
2. Predtechenskaya E.A., Budnikov V.I., Devyatov V.P. Lower-Middle Jurassic in the Urengoy region: lithology, facies and reservoirs [Litologiya, fatsii i kollektory nizhnei-srednei yury Urengoiskogo raiona]. In: Geologiya i neftegazonosnost' trias-sredneyurskikh otlozhenii Zapadnoi Sibiri. Novosibirsk: SNIIGGiMS; 1991. pp. 20–32.
3. Ushatinskaya I.N., Ryl'kov A.V. Composition and settings of formation of deep-seated plays in the Urengoy region (according to data from ultradeep well СГ-6) [Sostav i usloviya formirovaniya porod glubokozalegayushchikh neftegazonosnykh kompleksov Urengoiskogo raiona (po materialam sverkhglubokoi skvazhiny SG-6)]. In: Nauchnoe burenie v Rossii. Perm: KamNIIKIGS; 1996. Issue 4. pp. 1107–1123.
4. Ushatinskaya I.N., Ryl'kov A.V. Lithological indicators of oil and gas bearing capacity of Triassic-Jurassic formations in the north of Western Siberia [Litologicheskie pokazateli perspektiv neftegazonosnosti trias-yurskikh otlozhenii na severe Zapadnoi Sibiri] In: Kriterii otsenki neftegazonosnosti nizhe promyshlenno osvoennykh glubin i opredelenie prioritetnykh napravlenii geologo-razvedochnykh rabot. Perm: KamNIIKIGS; 2001. Book 1. pp. 86–98.
5. Shemin G.G., Nekhaev A.Yu., Krasavchikov V.O., Ryabkova L.V., Fomin A.N., Beizel' A.L., Bukreeva G.F., Vakulenko L.G., Zinov'ev S.V., Kosyakov D.V., Lapin P.S., Brekhuntsov A.M., Bochkarev V.S., Deshchenya N.P., Urasinov B.L. Deeply subsided Lower Jurassic units in the North of the West Siberian oil and gas province: criteria and evaluation of petroleum potential. Russian geology and geophysics. 2002;43(12):1107–1123.
6. Afanasenkov A.P., Surova N.D., Levchuk L.V., Kiselev A.A., Kopilevich E.A. Capacitive characteristics of reservoirs of Jurassic–Cretaceous deposits of the Gidan and Western part of the Yenisei-Khatanga oil and gas bearing areas. Geologiya nefti i gaza. 2017;(4):45–54.
7. Shemin G.G. Regional oil and gas reservoirs in the Jurassic formations of the northern West Siberian province [Regional'nye rezervuary nefti i gaza yurskikh otlozhenii severa Zapadno-Sibirskoi provintsii]. Novosibirsk: Izd-vo SO RAN; 2014. 362 p.
8. Kontorovich A.E., Nesterov I.I., Salmanov F.K., Surkov V.S., Trofimuk A.A., Erv'e Yu.G. Oil and gas geology of the Western Siberia [Geologiya nefti i gaza Zapadnoi Sibiri]. Moscow: Nedra; 1975. 680 p.
9. Devyatov V.P., Kazakov A.M., Shurygin B.N. Stratification of oil-bearing Lower-Middle Jurassic formations in Siberia: results and problems [Rezul'taty i problemy stratigrafii neftegazonosnykh nizhne-sredneyurskikh otlozhenii Sibiri]. In: Geologiya i problemy poiskov novykh krupnykh mestorozhdenii nefti i gaza v Sibiri. Novosibirsk; 1996. Part 1. pp. 68–72.
10. Shemin G.G., Beizel' A.L., Levchuk M.A. et al. Detailed correlation of oil and gas bearing Callovian and Upper Jurassic formations in the northern regions of Western Siberia [Detal'naya korrelyatsiya neftegazonosnykh otlozhenii kelloveya i verkhnei yury severnykh raionov Zapadnoi Sibiri]. Geologiya i geofizika = Russian geology and geophysics. 2000;41(8):1131–1144.
11. Shemin G.G., Nekhaev A.Yu., Ryabkova L.V. et al. High-resolution stratigraphy of the Lower and Middle Jurassic petroliferous deposits of Northern West Siberia. Geologiya i geofizika = Russian geology and geophysics. 2001;42(5):749–765.
12. Dobrynin V.M. Deformations and physical properties changes in oil and gas reservoirs [Deformatsii i izmeneniya fizicheskikh svoistv kollektorov nefti i gaza]. Moscow: Nedra; 1970. 239 p.
13. Pavlova N.N. Rocks deformation behaviour and reservoir properties [Deformatsionnye i kollektorskie svoistva gornykh porod]. Moscow: Nedra; 1975. 240 p.

G.G. Shemin

The Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences (IPGG SB RAS),

Novosibirsk State University,
Novosibirsk, Russia;

shemingg@ipgg.sbras.ru

V.A. Vernikovskii

The Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences (IPGG SB RAS),

Novosibirsk State University,
Novosibirsk, Russia;

vernikovskyva@ipgg.sbras.ru

N.V. Pervukhina

The Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences (IPGG SB RAS),
Novosibirsk, Russia;

pervuhinanv@ipgg.sbras.ru

E.V. Deev

The Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences (IPGG SB RAS),

Novosibirsk State University,
Novosibirsk, Russia;

deevev@ngs.ru

M.Yu. Smirnov

All-Russian Research Geological Oil Institute, Moscow,

smirnov@vnigni.ru