文献类型：期刊文献

英文题名：A unified volume translation model in SRK EOS for dry gas constituents

作者：Wu, Changxu[1];Shi, Jialin[2,3];Li, Huazhou[1]

机构：[1]Univ Alberta, Fac Engn, Sch Min & Petr Engn, Edmonton, AB T6G 1H9, Canada;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2V4, Canada

年份：2025

卷号：143

外文期刊名：GAS SCIENCE AND ENGINEERING

收录：;EI(收录号：20252918798481);WOS:【SCI-EXPANDED(收录号:WOS:001548152900001)】；

基金：H. Li greatly acknowledges a Discovery Grant from the Natural Sciences and Engineering Research Council of Canada (NSERC) and an NSERC Alliance-Alberta Innovates Advance Program. C. Wu gratefully acknowledges the financial support provided by the China Scholarship Council (CSC) via a Ph.D. Scholarship (No. 202206440061). The authors also greatly acknowledge the financial support provided by Research Institute of Petroleum Exploration and Development (RIPED) through the Core Technology Project of China National Petroleum Corporation (CNPC) "Research on Thermal Miscible Flooding Technology" (2023ZG18).

语种：英文

外文关键词：Dry gas; Volume translation; SRK EOS; High temperature/pressure; Thermodynamic consistency

摘要：Dry gas, mainly made of light hydrocarbons (such as methane and ethane), is an important type of natural gases. The PVT properties of dry gas constituents (e.g., compressibility factor) play an important role in the various stages of dry gas recovery. In this study, we develop an improved distance-function-based volume translation model in Soave-Redlich-Kwong equation of state (SRK EOS) for dry gas constituents (including carbon dioxide, nitrogen, methane, ethane, propane, n-butane, isobutane, n-pentane, isopentane, and neopentane). This model not only accurately replicates the critical compressibility factor for a specific dry gas component but also maintains strong performance across a broad range of pressures and temperatures (i.e., pressure range: from triple-point pressure to 300 MPa; temperature range: from triple-point temperature to 600 K). For the 10 dry gas constituents considered in this study, the new volume-translated SRK EOS yields an %AAD of 1.27 in reproducing saturation pressure, while it yields %AADs of 0.73, 0.38, 0.69, 1.72, and 1.55 in reproducing the liquid-phase, vapor-phase, saturated-liquid-phase, saturated-vapor-phase, and supercritical-phase compressibility factors, respectively. Moreover, the new volume-translated rescaled SRK EOS (VTR-SRK EOS) does not lead to crossover of pressure-volume isotherms within the tested pressure/temperature ranges.