西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (3): 57-61.DOI: 10.3863/j.issn.1674-5086.2009.03.013

• 地质勘探 • Previous Articles     Next Articles

SEDIMENTARY CHARACTERISTICS OF SUBLACUSTRINE FAN OF TAOQIHE FORMATION OF LOW CRETACEOUS IN SUNWU-JIAYIN BASIN

ZHANG Lei1，2 LIU Zhao-jun2 YANG Ting1 DU Jiang-feng2 HOU Wei3   

  1. 1.College of Resources and Information，China University of Petroleum，Changping Beijing 102249，China;2.College of Earth Sciences，Jilin University，Changchun Jilin 130061，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-06-20 Published:2009-06-20

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Abstract:

The Taoqihe formation of Low Cretaceous of Zhanhe Rift in Sunwu-Jiayin Basin develops typical Sublacustrine fan sedimentation.According to geochemistry，core and well log information,combining with the grain analysis data，it is confirmed that the Sublacustrine fan develops in the hydrogenate fresh water environment.Also,the Sublacustrine fan is divided into three subfacies,inner fan，middle fan and outer fan furtherly,six microfacies are recognized in this region.The Sublacustrine fan in this region develops near the steep slope controlled by the syngenesis fault and is dominated by the fault episodic tectonic activity.The Sublacustrine fan,which is conserved in the semi-deep lacustrine-deep lacustrine perched water environment,pertains to surging sublacutrine fan.The conglomerate and sandstone in the fan is favorable to form lithologic trap,the turbidities of braided channel microfacies in middle fan has the best storage condition.

Key words: Sunwu-Jiayin Basin, Zhanhe Rift, Taoqihe Formation, Sublacutrine fan, sedimentary characteristic, significance of petroleum geological

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