Due to the poor salt resistance of polyacrylamide polymers,the technology of polymer flooding for enhanced oil recovery in high calcium and magnesium reservoirs is limited.By introducing the suspen-ded microcrystalline polymer system,it becomes beneficial for the injection of water containing the high-concentration calcium and magnesium ions.The self-developed tackifier turns the calcium and magnesium ions into microcrystals,and associates the microcrystals with polymer molecules to form a local network.The structure of the three-dimensional macromolecules has the properties of anti-calcium and magnesium,thickening,and the increased viscosity of the polymer solution.The optimum concentration of dispersant and crystallization agent in suspended microcrystalline polymer system is 0.2%and 0.3%,respectively.The polymer is preferably hydrophobic associative polyacrylamide polymer.
关键词
高钙镁油藏/聚合物驱/性能评价/悬浮微晶
Key words
high calcium magnesium/polymer flooding/performance evaluation/suspended microcrys-tals
维普
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