Title: Diagenesis and Porosity Evolution of Chang-6 Oil-bearing Formation in Zhiluo Oilfield of Ordos Basin
Abstract: Chang-6 Oil-bearing Formation of Triassic Yanchang Formation in Zhiluo Oilfield of Ordos Basin is weightily exploited in recent years.Characteristic of petrology and diagenesis of the oil-bearing formation was studied.The result showed that Chang-6 Oil-bearing Formation was composed by fine-grained and debris feldspar sandstones;sandstone experienced complex diagenesis including compaction,cementation,alteration and dissolution;diagenesis reached A period in the late diagenetic stage.Diagenesis controlled reservoir porosity of sandstones in which compaction and cementation caused low permeability while secondary vugular-solution pore improved the reservoir property and controlled distribution characteristics of Chang-6 Oil-bearing Formation with relatively high permeability and porosity.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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