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《Geophysical Prospecting for Petroleum》 2008-05
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High-resolution Sequence Stratigraphy and Gas Accumulation of Shanxi Formation in East Ordos Basin

Peng Haiyan Liu Jiaduo Chen Hongde Liu Wenjun Ye Liming Gong Jianxuan Institute of Sedimentary and Geology,Chengdu University of Technology,Chengdu 610059,China  
Through integrated analysis of field crop,core and logging da- ta,Cross base level cycle principle was adopted to study the high- resolution sequence stratigraphy of Shanxi formation in Ordos Ba- sin.Two kinds of different depositional system types were pro- posed in Shanxi formation.In early phase,sedimentary environ- ment is mainly alluvial-delta-shallow sea of marine-continental tran- sitional facies and braided river of fluvial facies.In later phase, sedimentary environment is mainly alluvial-delta-lacustrine of conti- nental facies and meandering river of fluvial facies.On the basis of researching sequence stratigraphy,the spatial distribution of se- quence formations is discussed and its relationship with gas accu- mulation is probed.The result shows that gas mainly accumulates in rising semi-cycle of various level cycle sequences in Shanxi for- mation.
【CateGory Index】: P618.13
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