Lohrenz剩余粘度模型的改进及其应用

用Peng Robinson状态方程计算的密度和典型原油粘度的实测数据对Lohrenz等提出的剩余粘度模型中对比密度多项式的系数进行了重新关联 ,并通过引入C 7组分的有效相对密度和CO2 的有效摩尔分数 ,使改进后的剩余粘度模型成功地用于预测油藏原油和注CO2 原油的粘度 ,预测精度可满足工程应用要求。

MODIFICATION OF LOHRENZ VISCOSITY MODEL AND APPLICATION OF THE MODIFIED MODEL

The coefficients of reduced density polynomial in residual viscosity model proposed by Lohrenz are re regressed using the density values calculated by PR EOS and experimentally measured viscosity data of one typical crude oil. Subsequently,by introducing the effective relative density of C 7 component and effective molar fraction of carbon dioxide, the usage of modified residual viscosity model is extended to the prediction of viscosity of crude oil and carbon dioxide injected oil successfully. The modified model gives better prediction results than other existing viscosity methods.