The Neogene Rioni and Kura foreland basins in Georgia are located between the converging Greater and Lesser Caucasus fold-and-thrust belts. The Rioni Basin continues westward into the Black Sea whereas the Kura Basin extends eastward into Azerbaijan and the Caspian Sea. “Pre-” and “post-salt” petroleum systems are distinguished in the Rioni Basin separated by an Upper Jurassic evaporite succession of regional extent. The pre-salt petroleum system in the northern Rioni Basin is still poorly understood. Bathonian shales have generated oil which has been recorded in Middle Jurassic sandstones. However, as the origin of the oil in Upper Jurassic sandstones (e.g. at the Okumi oil discovery) is still problematic, the pre-salt petroleum system remains poorly constrained. Gas-rich, high volatile bituminous coals of Bathonian age may represent a CBM play.

中文翻译：

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佐治亚州 Rioni 和 Kura 盆地的石油系统

乔治亚州的新近纪 Rioni 和 Kura 前陆盆地位于交汇的大高加索和小高加索褶皱冲断带之间。里奥尼盆地继续向西进入黑海，而库拉盆地向东延伸进入阿塞拜疆和里海。“盐前”和“盐后”石油系统在里奥尼盆地被区分为区域范围的上侏罗统蒸发岩序列。里奥尼盆地北部的盐下石油系统仍然知之甚少。巴通阶页岩产生的石油已记录在中侏罗世砂岩中。然而，由于上侏罗统砂岩中的石油来源（例如 Okumi 石油发现）仍然存在问题，盐下石油系统仍然缺乏约束。巴顿时代富含气体、高挥发性的烟煤可能代表了煤层气。