1887

Abstract

Summary

The vast rock complex of deepwater mass transport deposits (MTDs) from Neogene to Quaternary in age has been recently mapped upon the results of the complex study combining 2D (regional), 3D data and deep exploration drilling within Ukraine's maritime exclusive economic zone in the northwestern part of Black Sea and adjacent offshore. The multi-stage seals for upward hydrocarbon migration are formed by shear (gliding) surfaces at the bottom of each MTD. Filling complexes of incised valleys in the continental paleoslope and buried river paleo-valleys of the inner shelf combining with drainage system of different reservoir rocks formed by distal turbidities of deepwater fans and channels, modulate distributive network of migration pathways for hydrocarbons generated from thermally mature source rocks in the depocentral part of the Western depression of Black Sea basin. The system of marginal high-amplitude normal faults at paleo-shelf hinge and erosion surfaces facilitates migration of hydrocarbons form lower to higher stratigraphic levels of deepwater domain and their permeation into adjusted paleo-shelf terrace through the contact with older reservoir in Upper Cretaceous, Paleocene and Eocene strata that is quite important issue for planning of exploration activity for oil and gas in this region.

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/content/papers/10.3997/2214-4609.201900862
2019-06-03
2024-04-19
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