Oil & Gas Geology ›› 2015, Vol. 36 ›› Issue (4): 621-629.doi: 10.11743/ogg20150412

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Sedimentary characteristics of typical fluvial facies in the Cretaceous Quantou Formation in southeast uplift of southern Songliao Basin

Li Zhandong1, Wang Dianju2,3, Zhang Haixiang1, Yin Yuelei3, Zhao Fengquan3, Xu Lei3, Cheng Peng3, Liu Yan3   

  1. 1. College of Petroleum Engineering Institute, Northeast Petroleum University, Daqing, Heilongjiang 163318, China;
    2. Institute of Oil and Gas, Peking University, Beijing 100871, China;
    3. College of Earth Sciences Institute, Northeast Petroleum University, Daqing, Heilongjiang 163318, China
  • Received:2014-12-15 Revised:2015-05-05 Online:2015-08-08 Published:2015-08-28
  • Contact: 王殿举(1989—),男,博士生。油田构造及石油地质。E-mail:38955671@qq.com。 E-mail:38955671@qq.com

Abstract: Data of core analyses, logging curves, laboratory tests and seismic profiles, were employed in the analyses of the Cretaceous Quantou Formation in southeast uplift of southern Songliao Basin to understand its reservoir characteristics, sedimentary facies types and configuration of sedimentary system.The results show that the formation is dominated by oxidized purple sandstone and pink siltstone.Reservoirs are tight with rather low porosity and permeability and contain mainly quartz, feldspar, debris and trace minerals.Heavy Mineral Assemblage Analysis Method and Sand Content Analysis were used to reveal the controlling factors of the basin.It shows that three major fluvial branches, namely Lishu-Sangshutai, Changchun-Nongan and Yushu-Fuyu, controlled the basin.Sand content decreases gradually from east to west along the edge of the basin to another depression.The formation features in rapid sedimentation of coarse grains which formed fans in steep slopes and rivers in gentle slopes.Stratigraphically speaking, the basin contains sequence V-q1 which mainly developed braided river deposits and alluvial fan deposits; Sequence V-q2 and V-q3 which mainly developed alluvial fan, braided river, meandering river depositional system, during its transition from braided river to meandering river, and sequence V-q4 which developed the meandering river deposits and completed the process of turning from braided river to meandering river.Meanwhile, Changchun and Yushu branches converged in Changchun Ridge anticline belt and formed fluvial deposits during the late stage of the formation.

Key words: meandering river, braided river, Quantou Formation, Cretaceous, southeast uplift

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