G.N. Gogonenkov, O.A. Vedenyapin, A.A. Evdokimov, S.A. Kaplan, P.Yu. Kulikov, E.B. Lebedev, N.V. Lyapin, G.D. Ukhlova
 
Seismic works in Domanik-type formations exploration and prospecting
DOI 10.31087/0016-7894-2020-4-65-81

The authors discuss the physical principles of seismic methods application in identifying and mapping of the Domanik-type formations using the surface- and well-based measurements in the north-eastern shoulder of the Mukhanovo-Erokhovsky trough (southern branch of the Kamsky-Kinel’sky system of troughs). It is shown that the main parameter causing anomalies of elastic properties in the Upper Devonian carbonate-siliceous deposits is the volume of the high-carbon part of the rock, primarily kerogen. The kerogen content in Domanik-type formations can reach 25–30 %. A sharp increase in natural radioactivity measured in wells using gamma-ray logging is typical of the intervals having high kerogen content in Upper Devonian deposits. It is shown that gamma-ray anomalies correlate significantly with anomalies of elastic wave travel velocity and bulk density on diagrams of sonic and density logging. A question of kerogen amount versus mobile oil in the Domanik-type
formations is beyond the capability of seismic exploration technique, and must be solved using other methods. Calculation of synthetic seismograms showed that anomalies of elastic properties associated with the high kerogen content create rather intense reflected waves comparable in amplitude to the reflections from Top and Bottom of the carbonate sequence, which are the regional marker horizons in the east of the Russian Platform. The main difficulty in identifying anomalies associated with the Domanik-type formations are the zones of argillaceous formations intercalated in the Upper Devonian sequences and observed in the shoulders of some paleo-arches; they create acoustic anomalies in the section, which are similar to anomalies from Domanik-type formations. Superposition of multiple reflections on useful signals in the Upper Devonian interval poses a main difficulty for seismic measurements. Suppression of these multiple reflections requires sufficiently powerful grouping in the acquisition stage and subsequent modern sophisticated data processing. The theoretical conclusions are supported by 2D
CPD data processing carried out in parallel in three companies using the leading-edge Russian and western processing systems. It is shown that all the interpreters have identified the persistent, well traced signals reflected from intervals with higher kerogen content in the sequence under investigation. Inversion transformations allowed obtaining a picture of acoustic impedance distribution with resolution corresponding to the capabilities of the seismic technique.

 

Key words: Domanik-type formations; seismic exploration; oil-shale accumulations; east of the Russian Platform; Kamsky-Kinel’sky system of troughs.

For citation: Gogonenkov G.N., Vedenyapin O.A., Evdokimov A.A., Kaplan S.A., Kulikov P.Yu., Lebedev E.B., Lyapin N.V., Ukhlova G.D. Seismic works in Domaniktype formations exploration and prospecting. Geologiya nefti i gaza. 2020;(4):65–81. DOI: 10.31087/0016-7894-2020-4-65-81. In Russ.

 

References

1. Varlamov A.I., Afanasenkov A.P., Pyr'ev V.I., Fortunatova N.K., Shvets-Teneta-Gurii A.G., Dakhnova M.V., Lodzhevskaya M.I., Mozhegova S.V., Kravchenko M.N. Perspektivy narashchivaniya mineral'no-syr'evoi bazy traditsionnykh i trudnoizvlekaemykh uglevodorodov v Rossii [On the possibility to augment the conventional and hard-to-extract hydrocarbon reserves of Russia]. Georesursy, geoenergetika, geopolitika. 2014;10(2):3–10. Available at: http://oilgasjournal.ru/vol_10/varlamov.pdf (accessed 16.03.2020). In Russ.
2. Fortunatova N.K., Paraskun V.I., Petersil'e V.I., Varlamov A.I., Shvets-Teneta-Gurii A.G., Baranova A.V., Kanev A.S., Dakhnova M.V., Astashkin D.A., Gorlov D.A., Mushin I.A., Belousov G.I., Frenkel' S.M., Komar N.V., Mozhegova S.V. Netraditsionnye istochniki uglevodorodnykh otlozhenii domanikovogo tipa [Unconventional sources of hydrocarbon deposits of domanic type]. In: A.I. Varlamov, ed. VNIGNI-65: Lyudi, rezul'taty i perspektivy. Moscow: Izd-vo VNIGNI; 2018. pp. 321–350. In Russ.
3. Prishchepa O.M., Aver'yanova O.Yu. Definitions and terminology of hydrocarbon-bearing shale formations and tight reservoirs. Geologiya, geofizika i razrabotka neftyanykh i gazovykh mestorozhdenii. 2014;(6):17–21. In Russ.
4. Varlamov A.I., Petersil'e V.I., Poroskun V.I., Fortunatova N.K., Komar N.V., Shvets-Teneta-Gurii A.G. Temporary methodological recommendations on the calculation of oil reserves in Domanic Productive sediments. Nedropol'zovanie XXI vek. 2017;67(4):104–115. In Russ.
5. Varlamov A.I., Petersil'e V.I., Poroskun V.I., Fortunatova N.K., Komar N.V., Shvets-Teneta-Gurii A.G. Technique of oil reserves estimation in domanik deposits. Geologiya nefti i gaza. 2017;(5):51–65. In Russ.
6. Vashkevich A.A., Strizhnev K.V., Shashel' V.A., Zakharova O.A., Kas'yanenko A.A., Zagranovskaya D.E., Grebenkina N.Yu. Forecast of prospective areas for sediment type Domanic in the Volga-Ural oil and gas province. Neftyanoe khozyaistvo = Oil Industry. 2018;(12):14–17. DOI: 10.24887/0028-2448-2018-12-14-17. In Russ.
7. Alekseev A.D., Antonenko A.A., Zhukov V.V., Strizhnev K.V. The differentiated approach of the reserves estimation for source rock formations. In: Conference Proceedings of SPE Russian Petroleum Technology Conference and Exhibition (24–26 October, Moscow, Russia). 2016. DOI: 10.2118/182074-MS.

8. Sayers С.M. The effect of kerogen on the elastic anisotropy of organic-rich shales. Geophysics. 2013;78(2):D65–D74. DOI: 10.1190/geo2012-0309.1.
9. Vernik L., Liu X. Velocity anisotropy in shales: A petrophysical study. Geophysics. 1997;62(2):521–532. DOI: 10.1190/1.1444162.
10. Skibitskaya N.A., Burkhanova I.O., Bol'shakov M.N., Domanova E.G., Kuz'min V.A., Pugo T.A., Marutyan O.O., Yakovleva O.P., Zekel' L.A., Pribylov A.A., Navrotskii O.K. Nauchnoe obosnovanie otsenki neuchtennykh zapasov svyazannogo gaza gazokondensatnykh i neftegazokondensatnykh mestorozhdenii, sorbirovannogo vysokomolekulyarnymi komponentami i kerogenopodobnym polimerom produktivnykh otlozhenii (na primere Orenburgskogo NGKM) [Scientific rationale of unaccounted reserves of associated gas in gas condensate and oil and gas condensate fields, which is retained by high molecular weight components and kerogen-like polymer of pay zone (by the example of the Orenburgsky oil and gas condensate field)]. Georesursy, geoenergetika, geopolitika. 2015;9(1). Available at: http://oilgasjournal.ru/vol_9/skibitskaya.pdf (accessed 16.03.2020). In Russ.
11. Priezzhev I.I., Shmar'yan L.E., Solokha E.V. Metodika seismicheskoi inversii s pomoshch'yu geneticheskogo algoritma s posleduyushchim ispol'zovaniem rezul'tatov inversii pri modelirovanii kol lektorskikh svoistv rezervuara [Seismic inversion methodology using a genetic algorithm with subsequent use of inversion results in reservoir properties modelling]. Tekhnologii seismorazvedki. 2009;2:18–23. In Russ.
12. Vedenyapin O.A., Kaplan S.A., Lebedev E.B., Rok V.E. Metodiki izucheniya geofizicheskimi metodami slozhno postroennykh sred [Geophysical methodologies for studies of sections having complicated structure]. In: A.I. Varlamov, ed. VNIGNI-65: Lyudi, rezul'taty i perspektivy. Moscow: Izd-vo VNIGNI; 2018. pp. 259–283. In Russ.

G.N. Gogonenkov

Doctor of technical Sciences,
Advisor to Director-General
All-Russian Research Geological Oil Institute, Moscow, Russia
e-mail: gogonenkov@vnigni.ru

O.A. Vedenyapin
Senior Researcher
All-Russian Research Geological Oil Institute, Moscow, Russia
e-mail: vedenyapin@vnigni.ru

 

A.A. Evdokimov
Team Leader
All-Russian Research Geological Oil Institute, Moscow, Russia
e-mail: Evdokimov@vnigni.ru

 

S.A. Kaplan
Candidate of technical Sciences,
Head of Department
All-Russian Research Geological Oil Institute, Moscow, Russia
e-mail: kaplansam@rambler.ru

 

P.Yu. Kulikov
1st Category Geologist
MiMGO, Moscow, Russia
e-mail: kulikov@mimgo.ru

 

E.B. Lebedev
Head of Section
All-Russian Research Geological Oil Institute, Moscow, Russia
e-mail: e_lebedev@vnigni.ru

 

N.V. Lyapin
Leading Geologist
MiMGO, Moscow, Russia
e-mail: lyapin@mimgo.ru

 

G.D. Ukhlova
Candidate of Geological and Mineralogical Sciences,
Chief Geologist
MiMGO, Moscow, Russia
e-mail: ukhlova@mimgo.ru