| The titled swellablegr anular precross linked polymer(SGPP) is prepared by crosslinking of an alkaline hydrolysis product of a starch graft polyacrylnitrile. It is a new type of blocking agent, has some degree of mobility, and expand the role of blocking agent, played profile control and flooding the dual-effect. When the migration into the process, it can only within the big hole in the throat or migration Road Agency Formation plug.This selective access to the ability to significantly reduces the non-oil producing purpose of the injury, and raises Plugging effect. But in the process of implementing the scene, there have been some constraints pilot test results of technical difficulties, If swellable polymer and carrying fluid compatibility, impact swellable polymer flooding effects of factors. Therefore, in order to better serve the swellable polymer flooding of the transfer function, instrumentation analysis, its profile control system expansion properties, shear resistance and flow properties and for the transfer of flooding experiment of the system. The results show that increasing carrying liquid polymer concentration can improve swellable polymer shear; Use of anti-shear capacity of swellable polymer can increase the effect of profile modification; and raise the swellable polymer concentration, carrying liquid polymer molecular weight and concentration can improve the profile modification. By swellable polymer profile control field test results of the research data shows that the injection pressure rise. As absorbent index decreased water absorption profile has been significantly adjusted well to see the effect profile control. These have shown a swellable polymer has a good profile control role. Indoor research and pilot test, the combination of its large-scale application as soon as possible to provide a theoretical basis and practical feasibility. |
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