Sedimentological Analysis of Well Data by the Example of the Dagi Horizon of the Northeastern Shelf of Sakhalin Island

V.V. Rybal'chenko a, D.Ya. Khabibullin a, A.Yu. Petukhov a, A.V. Davydov b, V.N. Khoshtariya c, S.E. Dmitriev c, S.N. Khlanovskaya c, A.F. Islamov d*, S.S. Egorov e, R.I. Tukhtaev d, R.R. Khasanov f**

a PAO “Gazprom”, St. Petersburg, 196105 Russia

b OOO “Gazprom geologorazvedka”, Tyumen, 625000 Russia

c Office for Geological Exploration Management on Shelf (Moscow),

OOO “Gazprom geologorazvedka”, Moscow, 117246 Russia

d Schlumberger Company, Moscow, 125171 Russia

e Schlumberger Company, Regional Office, Tyumen, 625000 Russia

f Kazan Federal University, Kazan, 420008 Russia

E-mail: *AIslamov2@slb.com, **Rinat.Khassanov@kpfu.ru

Received January 22, 2016

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Abstract

Well logging methods provide important data on data on sedimentary structures, genesis of sediments, and relations of the facies in sedimentary basins. This paper demonstrates the potential of sedimentological interpretation when applied to data from the formation microimagers (FMI). The study is based on the results of the joint project on integrated analysis of wellbore images and core samples of the Neogene deposits of the northeastern shelf of Sakhalin Island between “Gazprom”, “Gazprom geologorazvedka”, and Schlumberger Company. The image log represents 300 m of the well section, when 95 m are    characterized by the core. The study included detailed matching of the core data with open hole logs as adjusted for core recovery, lithological des­cription of the well section, structural and textural interpretation of the images, facies analysis, orientation of the paleocurrent direction, and reconstruction of the depositional environments.

Keywords: microimagers, sedimentological analysis, facies, sedimentary deposits, core, well logging, well

Figure captions

Fig. 1. Lithological and stratigraphical column of the northeastern shelf of Sakhalin Island [7].

Fig. 2. FMI device (on the left), oriented image (centre), and three-dimensional display of the image (on the right).

Fig 3. Examples of images and their visualizations (full-size image and images of datum plane section – textural and background ones).

Fig. 4. Detailed matching of the core data with FMI images.

Fig. 5. Isolation of carbonate sand lenses and siltstone alternation.

Fig. 6. Thin lamination of siltstone-argillaceous varieties.

Fig. 7. Results of the interpretation of sedimentological characteristics by the boring core.

Fig. 8. Intrastratal stratification (red color) and reactivation surfaces (black color) of sand variations by the data of images.

Fig. 9. Identification of lamina bedding elements in the intervals of sandy and thin-layered siltstone-argillaceous varieties.

Fig. 10. Thin lamination of sandy-argillaceous variations and carbonate sand interlayers based on the data from images.

Fig. 11. Example of the hummocky cross stratification.

Fig.12. The lower part of the profile having a regression structure in the Ferron Formation (Utah, United States), which is transitional from the shelf to the coastal area.

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For citation: Rybal'chenko V.V., Khabibullin D.Ya., Petukhov A.Yu., Davydov A.V., Khoshtariya V.N., Dmitriev S.E., Khlanovskaya S.N., Islamov A.F., Egorov S.S., Tukhtaev R.I., Khasanov R.R. Sedimentological analysis of well data by the example of the Dagi horizon of the northeastern shelf of Sakhalin Island. Uchenye Zapiski Kazanskogo Universiteta. Seriya Estestvennye Nauki, 2016, vol. 158, no. 1, pp. 55–74. (In Russian)


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