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Geoscience ›› 2011, Vol. 25 ›› Issue (3): 594-598.

• Water Resource and Environment • Previous Articles     Next Articles

5Research on the Formation Stages of Oilgas Reservoirs in Beier Depression of Hailaer Basin

 QIN  Wen-Long-1, 2 , 3 , CUI  Jun-Beng-1, 2    

  • Online:2011-06-22 Published:2011-06-23

Abstract:

On the basis of illite dating method, hydrocarbon generated and hydrocarbon expulsed process and  homogenization temperatures of fluid inclusion, formation stages of oilgas reservoirs in Beier depression of Hailaer basin are studied. It shows that there are two main formation stages of oilgas reservoirs in Beier depression of Hailaer basin. The first stage is about 120-80 Ma, which is corresponding to sedimentary period of Yimin Formationearly sedimentary period of Qingyuangang Formation, which is the main formation time of oilgas reservoirs in Beier depression of Hailaer basin. The great majority of formation period of oil and gas is 105-90 Ma, which is corresponding to secondthird segment sedimentary period of Yimin Formation. It is the abundant period of hydrocarbon generated and expulsed process, and sufficient migration force is helpful to formation of oil and gas reservoirs. The second stage is from Qinyuangang Formation to now which is second formation process of oilgas reservoirs. The oilgas reservoirs formed in the first stage is adjusted in the second stage.

Key words: Hailaer basin, Beier depression, dating of illite, fluid inclusion, formation stage of oilgas reservoir