聚丙烯酰胺在页岩和砂岩表面的吸附行为研究

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Research on the Adsorption Behavior of Polyacrylamide on the Surfaces of Shale and Sandstone

LI Jun LAN Lin XIAO Mao DENG Xiangyuan

Petroleum Engineering Technology Research Institute, SINOPEC Southwest Oil & Gas Com

Abstract:The study of adsorption retention of polymers on the surface of unconventional reservoir rocks is of great significance for guiding the optimization of fracturing fluid formulations and improving theeconomic benefits of unconventionaloilandgasreservoirs.Thispaperselectedthecommonlyused polyacrylamide(PAM) treatmentagentto study its adsorption behavioronsurfacesofshaleand sandstone.Itquantifiedtheefectsofpolymerconcentrationandadsorption time on PAM adsorption behavior on the rock surface.The results showed thatthe adsorptioncapacity ofPAMon shale was significantlyhigherthan thatonsandstone.The adsorptionofPAMonrock surfaces Was beter described bytheLangmuir adsorption isotherm model and the pseudo-second-order kinetic model. Calculated bythe fiting equations,the saturated adsorption capacity of PAMon shalewas 1.543mg/g ,while that on sandstone was 0.7158mg/g Keywords: polyacrylamide (PAM); shale; sandstone; adsorption isotherm; adsorption kinetic

0 引言

随着全球能源需求的持续增长和环保意识的提高，页岩气作为一种清洁、高效的能源资源，其市场需求将持续增长"。（剩余7418字）