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已有的压缩因子模型是否适用于特高压力区 (p >6 0MPa)内压缩因子的预测尚未明确 ,给特高压力油气藏储量的准确计算和开发方案的制定造成了一定的困难。用文献中纯组分和混合物及自测天然气压缩因子的实验数据对文献中的压缩因子模型进行了对比计算 ,重点为压力高于 6 0MPa的区域。结果表明 ,Dranchuk和Hall模型对 10个天然气样品压缩因子计算的总平均误差分别为 1.6 2 %和 1.6 8% ,而对特高压力区天然气压缩因子计算的总平均误差均为 1.7% ,可以满足工程计算的要求
The prediction of whether the existing compression factor model is suitable for the compression factor in the extra-high pressure region (p> 60 MPa) is not yet clear, which makes it difficult to accurately calculate the reserves of ultra-high pressure reservoirs and to develop the scheme. Comparing the compression factor model in the literature with the experimental data of pure components and mixtures in the literature and natural gas compression factor of self-test, the emphasis is on the pressure higher than 60MPa. The results show that the total average error of the compressibility factor of natural gas from Dranchuk and Hall models are 1.6 2% and 1.6 8% respectively, while the total mean error of natural gas compression factor of the extra-high pressure area is 1.7% Engineering calculation requirements