中邮证券-石化行业周报：油价基本面驱动不足，石化继续调整-250921

Group 1 - The petrochemical industry continues to adjust, with ongoing attention to the progress of eliminating outdated facilities and upgrading [1] - The oil and petrochemical index fell by 1.99% this week, while the best-performing segment was oil product sales and storage, which only declined by 0.46% [1] - Crude oil prices decreased, with an increase in US crude oil inventories and a reduction in gasoline inventories [1] Group 2 - Polyester filament prices and price spreads have decreased, with an increase in inventory days for polyester filament in Jiangsu and Zhejiang, and a decline in weaving machine operating rates [1] - The sample prices of polyolefins remained stable, with inventory depletion observed [1] - If demand improves and there is progress in eliminating backward production capacity, it would be beneficial for the midstream refining sector [2]