Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (3): 66-75.doi: 10.3969/j.issn.1673-8926.2017.03.008

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High-resolution sequence stratigraphy of alluvial fan: a case from Guantao Formation in SAGD development zone of Du 84 block, Shuyi area, Liaohe Depression

LI Chen1, FAN Tailiang1, GAO Zhiqian1, QIAO Xiaohui2, FU Wei3   

  1. 1. School of Energy Resources, China University of Geosciences, Beijing 100083, China;
    2. No. 3 Oil Production Plant, PetroChina Daqing Oilfield Company Ltd., Daqing 163000, Heilongjiang, China;
    3. Research Institute of Exploration and Development, PetroChina Liaohe Oilfield Company, Panjin 124010, Liaoning, China
  • Received:2016-05-11 Revised:2016-06-29 Online:2017-05-21 Published:2017-05-21

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Abstract: In order to recognize the distribution of remaining oil and guide the oil development in SAGD (Steam Assisted Gravity Drainage)development zone,the data of core,well logs and seismic were applied to study the stratigraphic sequence model of Guantao Formation in SAGD development zone of Du 84 block,Shuyi area,Liaohe Depression. The results show that Guantao Formation could be divided into one long-term sequence cycle (LSC),four middle-term sequence cycles (MSC)and ten short-term sequence cycles (SSC). Based on accommodation changes,SSC types include typeⅠ, Ⅱ, Ⅲ,Ⅳ and Ⅴ. Based on MSC isochronous unit,vertically SSC type is related to its position in MSC. The preserve degree of MSC is controlled by its position in LSC,and MSC formed in the ascending hemicycle of LSC can preserve more different SSC types. In a single MSC,the accommodation of SSC would gradually increase along source direction. The SSC type in Guantao Formation is related to the reservoir physical properties. The position of high quality reservoir is located in the border between root-fan and middle-fan or in the intra-middle-fan,and this position is always formed in the early or middle stage in the ascending hemicycle of MSC.

Key words: slope break zone, sandbody origin, valley geomorphology, Lower Cretaceous, Qingshuihe Formation, Chepaizi area, Junggar Basin

CLC Number: 

  • TE122.2
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