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High content of paraffin for condensate gas reservoir in Dalaoba and the precipitation of paraffin seriously affect the production and safety to bring about greater economic loss, therefore, it is necessary to develop the study on the precipitation of paraffin,deposition mechanism, variation discipline of phase state, prediction technology as well as the discipline for precipitation of paraffin of shaft.The paper establish the predication method on phase state simulation for paraffin precipitation. In order to better realize the site application, the predicted drawing version on paraffin precipitation of shaft is established to better predict the paraffin precipitation of shaft so as to provide the scientific basis for design on paraffin elimination and prevention on site as well as the construction and reasonable mining of condensate gas reservoir.