Abstract: According to the production conditions and problems caused by wax deposition of some oilfields in Xinjiang，the clean oil paraffin sample are gathered，and the result indicates that aromatic hydrocarbon，normal paraffin hydrocarbons and coarse-grained material such as asphaltene are contained in paraffin sample and the result is obtained by using XRD diffraction，the infrared spectrum and SEM.The SW-solid paraffin inhibitor which is suitable for oilfield is developed by optimizing host crystal and additives in laboratory.The experiment performance results in laboratory are obtained by using self-made experimental apparatus.The performances include dissolving rate (50℃:1.094mg/L?min-1，55℃:2.112mg/L?min-1，60℃:4.925mg/L?min-1)，paraffin control effect (good)，paraffin control efficiency (available 51.25%)，and the effect mechanism is analyzed by the experimental result.It can be concluded that well depth should be noticed in actual oilfield construction.
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Key words: oil-well paraffin prevention, wax sample analysis, development, evaluation, mechanism