The pH value of plaeofluid exerts great influence on the formation of the secondary pores of sandstones. In the paper. the control of the acid and alkaline diagenetic fluid environment on the reservoir quality was analyzed in the Upper Paleozoic tight sandstones in the Ordos basin. Based on the plenty of survey of casting thin section. https://allfixelectricales.shop/product-category/spade-terminal-cover/