V.N. Borodkin, A.R. Kurchikov, A.S. Nedosekin, A.V. Lukashov, O.A. Smirnov, E.N. Firstaeva, A.V. Pogretskii
 
Geoseismic model of Palaeozoic-Mesozoic series according to 3D seismic data: Beloostrovsky, Skuratovsky, and Nyarmeisky license areas
(Kara Sea waters)
DOI 10.31087/0016-7894-2019-1-72-85

The paper discusses features of geoseismic rock associations and discoveries of oil and gas exploration targets associated with them. The promising series are as follows: Palaeozoic, Triassic, Lower-Middle-Jurassic, Upper Jurassic, Cretaceous, and Aptian-Albian-Cenomanian. All of them belong to regional promising rock associations by analogy with the discovered fields in the north of Western Siberia. Traps of structural and non-structural types are for the first time identified and mapped. All the traps are confirmed by seismic amplitude-frequency attributes and results of AVO-analysis of seismic gathers. On the basis of modern 3D seismics, promising objects for hydrocarbon accumulations prospecting are identified within three license areas in the Kara Sea waters — in Palaeozoic, Triassic, Jurassic, and Cretaceous formations; recommendations on prospecting drilling are given. Two hydrocarbon traps confined to the domes of Skuratovsky and North Skuratovsky structural highs are delineated in Palaeozoic section; their total acreage is 118.6 km_2. High-amplitude zones pinching out towards the crestal parts of paleotopography are identified in the basal part of the Triassic series; their total acreage is 823.3 km_2. Three structural hydrocarbon traps confined to the domes of Nyarmeisky, Skuratovsky, and North Skuratovsky structural highs are delineated in Lower-Middle-Jurassic section. Development of sandy siltstone Nurminsky formations is predicted within the Upper Jurassic deposits. Combination traps are predicted in clinoform section of the lower part of Cretaceous regional series, and structural hydrocarbon traps in the upper part — within the Tanopchinsky formations. Structural hydrocarbon traps are also identified in Aptian-Albian-Cenomanian series. On the result of the completed studies, drilling of three prospecting wells is recommended.

Key words: Kara Sea waters; Skuratovsky and Nyarmeisky license areas; exploration target; reflection horizon; clinoform.

For citation: Borodkin V.N., Kurchikov A.R., Nedosekin A.S., Lukashov A.V., Smirnov O.A., Firstaeva E.N., Pogretskii A.V. Geoseismic model of Palaeozoic-Mesozoic series according to 3D seismic data: Beloostrovsky, Skuratovsky, and Nyarmeisky license areas (Kara Sea waters). Geologiya nefti i gaza = Oil and gas geology. 2019;(1):72–85. DOI: 10.31087/0016-7894-2019-1-72-85.

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V.N. Borodkin   Scopus

Trofimuk Institute of Petroleum Geology and Geophysics of Siberian Branch of Russian Academy of Sciences,
West-Siberian branch, Tumen, Russia;

Federal State Budget Educational Institution of Higher Education «Industrial University of Tyumen», Tyumen, Russia;

komgort@mail.ru

A.R. Kurchikov   Scopus

Trofimuk Institute of Petroleum Geology and Geophysics of Siberian Branch of Russian Academy of Sciences,West-Siberian branch, Tumen, Russia;

kurchikovar@ipgg.sbras.ru

A.S. Nedosekin   Scopus

LLC “Ingeoservice”, Tyumen, Russia;

anton.nedosekin@gmail.com

A.V. Lukashov   Scopus

LLC “Ingeoservice”, Tyumen, Russia;

an.lukashov@mail.ru

O.A. Smirnov   Scopus

LLC “Ingeoservice”, Tyumen, Russia;

smirnov.oa@gmail.com

E.N. Firstaeva   Scopus

LLC “Ingeoservice”, Tyumen, Russia;

efirsta@ingeos.info

A.V. Pogretskii

ООО «Gazprom geologorazvedka», Tyumen, Russia;

apogretskiy@ggr.gasprom.ru