New Data on the Geological Structure and Oil and Gas Potential of the Connection Area of the Anabar Anteclise, Vilyui Syneclise and Priverkhoyansk Trough (Munskaya Area)

In 2024, the first stage of geological and geophysical research was completed within the framework of the Federal project “Geology: The legend revival” (2022–2024). The exploration areas are located in the zone of the junction of the three largest superorder elements: the Anabar anteclise, the Vilyuisk syneclise and the Priverkhoyansk trough. The purpose of this publication is to clarify the geological structure and oil and gas potential of this area.

Within the Anabar anteclise, on the Munsky arch there is a shortened type of section, there are no deposits of the coastal-continental Permo-Triassic formation with the Triassic and Permian Play, which are the most promising both in the Vilyuisk syneclise (confirmed by the presence of deposits on the Khapchagai shaft) and in the Predverkhoyansk marginal trough. However, there are Lower-Middle Cambrian, Vendian terrigenous and Vendian carbonate Play.

The presence of a large number of shallow wells in the Munskaya area made it possible to reliably map the erosive upper boundary of the Cambrian sediments in seismic sections and to clarify the position of the structural plan on the underlying horizons. The contours of the Munsky arch and the thickness of the sedimentary cover have been clarified. Structurally, the area under study is a monocline slope, plunging southward from the Munsky Arch into the Vilyui syneclise. During detailed analysis of the structure of deposits in the Munsky area, much attention was paid to the dynamic analysis of the seismic record in order to search for non-anticlinal prospects.

As a result, structural-stratigraphic and structural-lithological perspective objects in the Vendian deposits were mapped, which are clearly on the seismic sections.

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