Feature of Neotectonism and Its Control on Late Hydrocarbon Accumulation in Qiongdongnan Basin
Received date: 2010-05-06
Revised date: 2011-01-16
Online published: 2011-08-10
Neotectonism occurred in the Qiongdongnan basin under regional stress field action controlled by deep seated structure,movements of adjacent plates and spreading of South China Sea.Neotectonism plays an important role in the thermal evolution of source rock,reservoir development,and trap formation.A lot of faults,which was formed later under the Neotectonism action,caused the deep hydrocarbon source interconnect with the shallower reservoirs.The vertical interconnection of hydrocarbon source and reservoir is favorable for hydrocarbon accumulation in Paleogene and Neogene.The neotectonisms widely exist in the east and south of Qiongdongna basin, such as Lingnan uplift,Songnan uplift,Changchang uplift,and northern slope of Baodao sag.The good assemblages of reservoir and seal in Neogene and Paleogene exist in these areas above.The late-formed faults made the hydrocarbons migrating upward and accumulating in the Paleogene and Neogene reservoirs,suggesting the good exploration in the future.
Key words: Qiongdongnan basin; Neotectonism; Late hydrocarbon accumulation.
ZHU Ji-Tian, PEI Jian-Xiang, SUN Zhi-Peng, GUO Ming-Gang, YAO Zhe, YANG Bao-Cheng, HU Xiang-Yang . Feature of Neotectonism and Its Control on Late Hydrocarbon Accumulation in Qiongdongnan Basin[J]. Natural Gas Geoscience, 2011 , 22(4) : 649 -656 . DOI: 10.11764/j.issn.1672-1926.2011.04.649
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