G. Tatishvili

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Victor Alania A. Chabukiani Onise Enukidze K. Gogrichiani Z. Mikeladze

This chapter shows 2D time-migrated seismic profile through the Bitsminda anticline: southern part of the Kura foreland fold and thrust belt (Georgia). In the chapter, fault-related folding theories are used in structural interpretation of S-N trending seismic profile. Identification of stratigraphic units at a depth for seismic profiles is based on outcrop correlations and Bitsminda-1 borehole data. Interpreted seismic reflection profiles show that the Bitsminda anticline is a shallow fault-propagation fold with the front limbs broken by thrust faults. The fold shows a strongly normal dragged hanging wall block, and a less dragged footwall block. Syntectonic (or synorogenic) Middle and Upper Miocene strata are represented by shallow marine, predominantly, terrigenic fine clastics, limestones and marls with rare conglomeratic interbeds and sandstones and thick continental sediments.

Anticline

Marl

Outcrop

Thrust fault

10.1002/9781119158332.ch5

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Stratigraphy and structure of the northern Rioni Basin, Georgia

EGUGA (2018)

Gábor Tari David Vakhania G. Tatishvili Vazha Mikeladze J. J. Mayer

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Stratigraphy, structure and petroleum exploration play types of the Rioni Basin, Georgia

Geological Society London Special Publications (2018)

Gábor Tari David Vakhania G. Tatishvili Vazha Mikeladze K. Gogritchiani

Abstract The Rioni Basin is an underexplored petroliferous basin located at the Georgian margin of the Black Sea flanked by two folded belts (the Greater Caucasus and the Achara–Trialet Belt). Whereas the stratigraphy of the northern onshore Rioni Basin has elements which are common with that of the offshore Shatsky Ridge, the southern onshore Rioni Basin segment is both stratigraphically and structurally akin to the offshore Gurian folded belt in the eastern Black Sea. In the northern basin segment, the existing oil fields (East and West Chaladidi) and an undeveloped oil discovery (Okumi) are related to either post-salt or pre-salt antiformal traps in detachment folds or in poorly understood stratigraphic pinchouts beneath a regional Upper Jurassic evaporite sequence. In the southern Rioni Basin, the oil in existing fields has either anticlinal four-way closures (Supsa) or a subthrust trap (Shromisubani) related to the leading edge of the north-vergent Achara–Trialet folded belt. Despite the long history of petroleum exploration in the Rioni Basin, these proven plays are not fully understood and systematically explored using modern technology. The existence of an Upper Jurassic regional evaporite seal highlights the possibility of pre-salt plays in the northern part of the basin.

Petroleum exploration

10.1144/sp464.14

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Didigori Syncline and Anticline

Victor Alania A. Chabukiani O. Enukidze K. Gogrichiani Z. Mikeladze

The Didigori syncline and Didigori anticline is part of the Kura foreland fold and thrust belt. This belt is located between Lesser and Greater Caucasus. An interpretation of the structure is presented based on surface data of 2D time-migrated seismic profile through the Didigori syncline and Didigori anticline and data from the T-14 well. Seismic reflection data reveal the presence of shallow south-vergent thrusts and duplex above a structural wedge. Fault-related folding theories were used for structural interpretation of the S-N trending seismic profile. Upper thrusts (F1, F2 and F3) and duplex are represented by Upper Miocene and Pliocene strata. The Lower north-vergent duplex sequence consists of Paleogene strata that formed by passive-roof duplexing. Upper Miocene and Pliocene are represented by thick continental and shallow marine sediments. In the Kura foreland fold and thrust belt, the geometry of Upper Miocene-Pliocene growth strata is associated with footwall syncline and piggyback basins.

Syncline

Anticline

Paleogene

10.1002/9781119158332.ch26

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