china npam/nonionic polyacrylamide/used in mine washing

china npam/nonionic polyacrylamide/used in mine washing
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  • What is nonionic polyacrylamide (NPAM) gel?
  • Nonionic polyacrylamide (NPAM) gel was prepared for in-depth profile control. A compact three dimensional network structure was formed in the bulk gel system. Retention, adsorption and bridging across the pore throats occur in high permeability zones. The NPAM gel shows superior high temperature resistant. °C.
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  • Where did NPAM and phenolic resin cross-linker come from?
  • Nonionic polyacrylamide (NPAM) and phenolic resin cross-linker were purchased from Yuguang Co. Ltd., China. The hydrolysis degree and average molecular weight of NPAM were 3.31% and 9,650,000 g/mol, respectively. The low salinity of brine (492.08 mg/L) was used in all experiments.
  • How does NPAM affect water permeability?
  • Through retention in the large channel, bridging across the pore throats and adsorption on the sand surface, the NPAM gel reduced the permeability of the reservoir and diverted following water into adjacent low permeability zones, resulting in a high water flow resistance in the sand-packs.