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Diageneses of Chang-6 sandstone reservoir in Wuqi Oilfield,Erdos Basin and their effects on reservoir property
Author(s): 
Pages: 42-45,113
Year: Issue:  4
Journal: Journal of Xi'an Petroleum Institute(Natural Scien

Keyword:  Wuqi OilfieldChang-6 sandstone reservoirdiagenesisreservoir property;
Abstract: The Chang-6 sandstone reservoir in this area is a set of medium-low porosity,super-low permeability reservoir.Through the analyses of cast thin sections,scanning electron microscope(SEM),X-ray diffraction, vitrinite reflectance of more than 50 sandstone samples,the diagenesis types of the sandstone reservoir and their effects on reservoir property are studied.It is held that mechanical compaction and carbonate cementation are the main factors of leading to the bad property of the reservoir,while dissolution improves the property of the reservoir in some degree.But the improvement of dissolution is relatively faint.Therefore,compared with near zones,the property of Chang-6 reservoir in this area is worse.
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