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Study on depositional features and oil-reserving capacity of Chang-63 super-low permeability sandstone reservoir of Shuguang Oilfield in eastern Gansu
Author(s): 
Pages: 33-36,113
Year: Issue:  4
Journal: Journal of Xi'an Petroleum Institute(Natural Scien

Keyword:  Shuguang OilfieldChang-63 reservoirsedimentary featureoil-reserving capacity;
Abstract: The depositional features and the oil-reserving capacity of the studied reservoir are analyzed based on logging and experimental data.It is shown that,the reservoir is the sandstone reservoir with low-porosity and super-low-permeability;it is a progressive delta front deposit,its property and oil-bearing capacity becomes better from below to above;debouch bar is its main and better reservoir type.The better reservoirs develop in the delta front zone,where is also main oil-gas abundance zone.The vertical sedimentary sequence of the reservoir and its lateral progradation matching control the development of the profile combination and the evolution of the comprehensive feature of the reservoir.Plane sedimentary facies belts control the depositional types,the polymerization degree and the comprehensive show of the lithology and property of the reservoir,and then they control the range of the oil-gas distribution in the reservoir.
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