Sequence stratigraphic framework and sedimentary facies prediction of the Jiufotang and Shahai Formations of Lower Cretaceous in Ludong Sag，Kailu Basin，Inner Mongolia
Liu Mingjie1 Xie Qingbin1 Liu Zhen1 Sun Jian2 Ran Bo3 Bai Lushan3
1 College of Geosciences，China University of Petroleum(Beijing)，Beijing 102249;
2 The Third Oil Recovery Factory of Dagang Oilfield Company，PetroChina，Cangzhou 061023，Hebei;
3 Research Insititute of Exploration and Development，Liaohe Oilfield Company，PetroChina，Panjin 124010，Liaoning
Comprehensively using cores,logging and seismic data,the sequence stratigraphic features and sedimentary facies of the Lower Cretaceous Jiufotang Formation and Shahai Formation in Ludong Sag,Kailu Basin,have been studied systematically.Three 3rd order sequence boundaries and two 3rd order sequences are identified in the two formations.Four kinds of sedimentary facies are identified,including fan delta,proximal turbidite fan,offshore turbidite fan and lacustrine facies.Within the sequence stratigraphic framework,the depositional bodies are researched by using well drilling,logging,2D and 3D-seismic data.Furthermore, the distribution of sedimentary facies and evolution law in system tracts have been researched,and the depositional model of this period was built.According to the model,fan delta dominately developed on the steep slope,while fan delta and beach bars developed on the gentle slope belt,and off-shore turbidite fan and tempestites developed in the deep depression zones in Ludong Sag.
Liu Mingjie,Xie Qingbin,Liu Zhen et al. Sequence stratigraphic framework and sedimentary facies prediction of the Jiufotang and Shahai Formations of Lower Cretaceous in Ludong Sag，Kailu Basin，Inner Mongolia[J]. JOPC, 2012, 14(6): 733-746.
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