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Volume 20 Issue 4
Aug.  2009
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Depositional Characteristics of Lake-Floor Fan of Cretaceous Lower Yaojia Formation in Western Part of Central Depression Region, Songliao Basin

  • Received Date: 2018-07-15
  • Based on the integrated subsurface data, including those of over 600 m drilled cores, more than 30 drilled wells and 600 km2 three-dimensional (3D) seismic-reflection data of the study area, the characteristics of the lake-floor fan of lower Yaojia (姚家) Formation have been clarified. An evident lacustrine slope break and a steep slope belt developed in the west of Songliao (松辽) basin during depositional period of Qingshankou (青山口)-Yaojia formations (K2). The slope gradient was about 15 m/km. During the depositional period of lower Yaojia Formation, the lake shrank and the shore line of the western Songliao basin shifted to the lacustrine slope-break...
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Depositional Characteristics of Lake-Floor Fan of Cretaceous Lower Yaojia Formation in Western Part of Central Depression Region, Songliao Basin

  • 1. School of Ocean Sciences, China University of Geosciences, Beijing 100083, China
  • 2. School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
  • 3. Daqing Oilfield Company, PetroChina, Daqing 163453, China
  • 4. School of Energy Resources, China University of Geosciences, Beijing 100083, Chin

Abstract: Based on the integrated subsurface data, including those of over 600 m drilled cores, more than 30 drilled wells and 600 km2 three-dimensional (3D) seismic-reflection data of the study area, the characteristics of the lake-floor fan of lower Yaojia (姚家) Formation have been clarified. An evident lacustrine slope break and a steep slope belt developed in the west of Songliao (松辽) basin during depositional period of Qingshankou (青山口)-Yaojia formations (K2). The slope gradient was about 15 m/km. During the depositional period of lower Yaojia Formation, the lake shrank and the shore line of the western Songliao basin shifted to the lacustrine slope-break...

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