Sequence stratigraphy and sedimentary filling evolution of fluvial facies of the Neogene of gentle slope belt in Huanghua Depression,Bohai Bay Basin
Chen Rong1, Wang Feng2, Li Yong3
1 Museum of Chengdu University of Technology,Chengdu 610059, Sichuan; 2 Institute of Sedimentary Geology, Chengdu University of Technology,Chengdu 610059, Sichuan; 3 College of Energy Resources of Chengdu University of Technology,Chengdu 610059, Sichuan
Abstract The Neogene of gentle slope belt in Huanghua Depression of Bohai Bay Basin is mainly composed of continental fluvial sediments. To explore the lithologic-stratigraphic reservoirs by using the theories of sequence stratigraphy is the current focus. The Minghuazhen Formation and Guantao Formation of Neogene in Huanghua Depression are the research objects. Based on the existing core, drilling and seismic data, together with the sequence interface recognition, the high-resolution sequence stratigraphic framework in the study area was established, including one super long-term cycle sequence, seven long-term cycle sequence and a number of middle-term and short-term cycle sequence. Filled by superposed sand bodies of braided river, the sequence stratigraphic model of multi-fault gentle slope with the structure of unsymmetric type, which only retained the rising stage of base level cycles, was developed in the Guantao Formation. The sequence stratigraphic model of stable slope with the sequence structure of uncompletely symmetrical type, which was mainly composed of rising stage of base level cycles, was developed in the Minghuazhen Formation. The composite sand bodies of braided river on the inside of multi-fault slope break in the early stage of sequence development is the most favorable reservoir sand body in the study area.
Corresponding Authors:
Wang Feng, born in 1977,associate professor,got his doctor??s degree of Chengdu University of Technology in 2007. He is engaged in sequence stratigraphy and lithofacies palaeogeography. E-mail: wangfeng07@cudt.cn.
About author: Chen Rong,born in 1982,with a Ph.D. degree obtained from Chengdu University of Technology,is an associate professor. She is engaged in sedimentology and stratigraphy. E-mail: chenrong07@cdut.cn.
Cite this article:
Chen Rong,Wang Feng,Li Yong. Sequence stratigraphy and sedimentary filling evolution of fluvial facies of the Neogene of gentle slope belt in Huanghua Depression,Bohai Bay Basin[J]. JOPC, 2016, 18(6): 976-985.
Chen Rong,Wang Feng,Li Yong. Sequence stratigraphy and sedimentary filling evolution of fluvial facies of the Neogene of gentle slope belt in Huanghua Depression,Bohai Bay Basin[J]. JOPC, 2016, 18(6): 976-985.
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