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— Middle Oxfordian–lower Kimmeridgian calcareous nannoplankton and foraminifers were first studied from the core log of the well drilled in Ivanovo oblast. Nannoplankton is well preserved; in total, nearly 25 species were identified. Zone NJ15 was distinguished on the basis of nannoplankton. Coccoliths of representatives of the genus Watznaueria, which are mostly cospomopolitan species, are dominant...
New oil reservoirs have been discovered recently in the Jurassic Toutunhe Formation in the Fudong slope, Junggar basin in China. The process and mechanism of lateral petroleum migration in the Jurassic System in the Fudong slope was investigated based on the geological analysis of the strata, porosity and permeability of the reservoir rocks and geochemistry on oil–source correlation and oil–oil correlation...
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