Preparation and evaluation of a low temperature crosslinking gel profile control system
In order to effectively inhibit the premature breakthrough in the process of dual flooding in low tem-perature and high water cut reservoir,the injection pressure is effectively increased,the sweep range of poly-mer dual flooding is increased,and the effect of dual flooding is improved.With partially hydrolyzed polyacryl-amide as the main agent and homemade organic and inorganic composite crosslinking agent as the crosslinking agent,the crosslinking gel profile control system suitable for low temperature oil reservoir was optimized by evaluating the effects of coagulant,polymer concentration and crosslinking agent concentration on gel forma-tion properties.The result showed that the crosslinking gel profile control system had delayed crosslinking ef-fect,and the crosslinking time was 6-7 days,which was conducive to deep profile control.The strength after gluing could reach G,the viscosity could reach 7 000 mPa·s,and the water plugging rate was above 95%.
low temperature reservoirscrosslinking gel profile control systemHPAMwater blocking and profile control technology
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