Paleogene Stratigraphic Sequence Framework and Sequence Origin in Damintun Sag
Online published: 2008-04-20
Damintun Sag is a hydrocarbon rich Cenozoic sag developed on a pre Paleogene base, 0.32 billion tons petroleum were found till 2007. Paleogene is the main oil producing and target layers. According to the tectonic evolution and characteristics of strata and deposition in Damintun Sag, by using drilling cores, cutting logs, well logs and high resolution 3\|D seismic data, 2 second\|order sequences including 7 third order sequences were classified in the Paleogene System. By accurate velocity analysis and combination of well and seismic data, a synchronic stratigraphic sequence framework was established, and the main sequence controlling factors were discussed. Tectonic subsidence, supply of deposits, lake level fluctuation and climate were considered controlling the formation of sequences, and tectonic subsidence was the main factor. The high precision sequence classification and the foundation of the synchronic stratigraphic sequence framework are of great significance to the exploration and research of lithological reservoirs in Damintun Sag.
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JU Dun-Cheng, LIU Bao . Paleogene Stratigraphic Sequence Framework and Sequence Origin in Damintun Sag[J]. Natural Gas Geoscience, 2008 , 19(4) : 462 -467 . DOI: 10.11764/j.issn.1672-1926.2008.04.462
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