Abstract The fluvial sediments of the Neogene in the Nanpu 35—2 area of Central Bohai Gulf are well developed and can be divided into two types as meandering river sediments and braided river sediments. The depositional sequences of meandering river are typical of the development of point bars, crevasse splays, natural levees and flood plains. The depositional sequences of braided rivers mainly consist of braided channel lag deposits and mid channel bar sandstones. Based on sedimentary structures, grain size probability curves, C-M charts, sedimentary sequences and logging curves, etc., this paper has discussed the sedimentary characteristics of each microfacies for fluvial sediments and concludes 6 types vertical sequences which reflect different sedimentation and features separately. This paper also probes into reservoir properties of the sand bodies and suggests that point bar and mid channel bar sand bodies can be considered the high quality reservoirs for great oil gas field, and the formation of oil gas pool not only be related to reservoir quality of sandbodies, but also to regional tectonic conditions.
About author: Yang Yuging, born in 1963, graduated from the University of Petroleum (Beijing) and obtained Ph D degree in 1995. Now he is a senior geologist in China Offshore Oil Logging Corporation, and is engaged in sedimentology and well logging geology.
Cite this article:
Yang Yuqing,Tian Hong,Meng Jie et al. FLUVIAL SEDIMENTS AND THEIR OIL GAS EXPLORATION SIGNIFICANCE OF THE NEOGENE IN THE NANPU 35—2 AREA OF CENTRAL BOHAI GULF[J]. JOPC, 2001, 3(4): 77-84.
Yang Yuqing,Tian Hong,Meng Jie et al. FLUVIAL SEDIMENTS AND THEIR OIL GAS EXPLORATION SIGNIFICANCE OF THE NEOGENE IN THE NANPU 35—2 AREA OF CENTRAL BOHAI GULF[J]. JOPC, 2001, 3(4): 77-84.
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