The history of tectonic development and the dynamics of the formation of anticlinal trap structures of the Gydan oil and gas bearing region (using the example of a Geophysical field)

Abstract

Using the example of a Geophysical field, the work examines the history of the formation of anticlinal trap structures in the Gydan oil and gas area. It is noted that in the Gydan oil and gas region, unlike the Nadym–Taz interfluve, the main gas accumulations are concentrated not in the Cenomanian, but in the Aptian sand layers of the TP group. It is concluded that such a redistribution of reserves across complexes is associated with a different history of the formation of trap structures. Unlike the Nadym–Taz region, where the formation of contrasting uplifts occurred in the post-Turonian period, the uplifts of the Gydan oil and gas region were formed at all stages of the Mesozoic–Cenozoic history, and the high potential of the Aptian deposits of this region is associated with an increase in the amplitudes of structures down the section and with the presence of Yarong cap-rock in the roof of the apt and a series of zonally developed clay bundles – tires.