摘要
本文基于状态方程预测P-V-T关系的误差与可调参数值呈线性关系的假设,通过对C_7^+馏分的状态方程参数进行调节,来拟合凝析气流体的实测P-V-T关系。曾将本文方法应用于拟合8个凝析气样品的实测P-V-T关系,结果表明,我们所作假设是合理的,对Soave-Redltch-Kwong(SRK)状态方程,将凝析气中的C_7^+馏分仅分割成三个假组分,并将C_2～C_3和C_4～C_6分别合并为一个组分,即可获得满意的结果.由于所需的组分数较少,本方法的拟合速度较快。
This work was based on the linearity assumption between deviation calculated by equation of state (EOS) and adjustment parameters of EOS, to regress experimental P-V-T data for gas condensates. This method was applied to match laboratory P-V-T data for eight gas condensate fluid samples. The results show that the above-mentioned linearity assumption is reasonable. In addition, it was found that satisfactory results could be obtained only by splitting C_7^+ fraction into three subfractions and grouping C_2～C_3 and C_4～C_6 each into one component when Soave-Redlich-Kwong(SRK) EOS was used.The proposed method can converge more rapidly as less number of components in calculating are required.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
1991年第2期78-85,共8页
Acta Petrolei Sinica(Petroleum Processing Section)
