Abstract
Allowing for the actual demands of the oilfields,the performance of the viscosity,salt tolerance,temperature resistance,time stability,molecular coil dimension,molecular aggregation,rheological property,viscoelasticity and flow characteristics of the HPAM/layered silcated nanocomposite(PLSN) solution was evaluated by modern reservoir engineering theory,equipment analysis and the physical simulation.The results showed that,the PLSN had an excellent salt tolerance,temperature resistance and time stability compared to the common polymer including "salt tolerance" polymer and "high molecule weight" polymer.The aggregation of PLSN was mainly a "flaky-reticular" formation while the "high molecule weight" HPAM had an elongated chain reticular configuration.Furthermore,oil displacement efficiency of PLSN would be higher than that of the common polymer because of its excellent viscoelasticity.Core flooding tests results indicated that,compared with common polymer,the PLSN material was characterized of lower viscosity and higher resistance factor and residual resistance factor,which ensured that the PLSN solution had a good fluid diverting role.
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