Abstract
According to core observation results, combining with drilling, seismic and logging data, the depositional characteristics of Shawan formation in Neogene of Chepaizi area were researched. The results show that the depositional system of Shawan formation is braided river delta-lacustrine facies and the sedimentary deposit comes from Zaire Hill at north west. The microfacies of well Pai 2 is underwater distributary channel deposit but not beach or bar. The sedimentary facies is typical of north west-south east distribution. Vertically, the sedimentary facies have undergone changes from braided river delta front subfacies to longshore shallow lacustrine subfacies to braided river delta plain subfacies. Underwater distributary channel deposit and sandbar are the favorable reservoir facies belt in the study area.
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Yang, S. C., Meng, X. M., Chen, N. N., Zhang, S. Q., & Xiang, K. (2011). Depositional characteristics of Shawan formation in Neogene of Chepaizi area, Junggar Basin. Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science), 35(2). https://doi.org/10.3969/j.issn.1673-5005.2011.02.004
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