Oil & Gas Geology ›› 2004, Vol. 25 ›› Issue (1): 49-53.doi: 10.11743/ogg20040109

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Reverse structures and their impacts on hydrocarbon accumulation in Songliao basin

Hou Guiting1, Feng Dachen2, Wang Wenming2, Yang Mohan1   

  1. 1. Dep.of Earth and Space Science of Beijing University, Beijing;
    2. Yushulin Oilfield Research Institute of Daqing Oilfield Company Limited, Zhaodong, Heilongjiang
  • Received:2003-08-25 Online:2004-02-25 Published:2012-01-16

Abstract:

Reverse structures in Songliao basin are mainly wide and gentle folds and placanticline with small deformation.The reverse structures have been formed in three differant stages:at the end of deposition of Nenjiang Formation in Late Cretaceous,at the end of deposition of Mingshui Formation and Late Cenozoic.The strongest reverse structural action that occurred at the end of deposition of Nenjiang Formation would have the largest effect on hydrocarbon accumulation in Songliao basin,including (a) reverse structures provide traps for hydrocarbon accumulation; (b) reverse structural actions promote remigration of hydrocarbons; and (c) reverse structures result in many fractures and thus improve the poroperm characteristics of reservoir rocks.

Key words: Songliao basin, reverse structure, reverse stage, hydrocarbon accumulation

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