【摘要】 CO₂注气压缩机是CO₂-EOR工艺的关键设备之一，超临界CO₂驱替工艺要求其将气体从低压气态压缩至高压超临界态，其运行安全可靠性至关重要。由于CO₂在近临界点物性的突变，超临界CO₂注气压缩机的设计与运行存在其特殊性。应用PR方程计算了混合气体在宽温度、压力范围内的压缩因子，分析了其在近临界点的分布规律，指出了气缸内压缩过程中不适宜存在的压力-温度工况范围，划定了超临界CO₂注气压缩机的“非设计区”工况，并提出了回避“非设计区”的手段与方法。更多还原

【Abstract】 CO₂ injection compressor is one of the key equipment of CO₂-EOR process. SCO₂-EOR requires the gas mixture compressed from low-pressure gas to high-pressure supercritical fluid in compressor and its operation safety and reliability are critical important. Due to the sudden change of properties of CO₂ near the critical point, the design and operation of the SCO₂ injection compressor has its particularity. The PR equation was used to calculate the compression factor of gas mixture in a wide range of temperature and pressure, and the distribution rule near the critical point was analyzed. The unsuitable range of pressure-temperature working conditions in the compression process was defined as“non-designable region”of SCO₂ injection compressor, and the methods of regulating working conditions were proposed.更多还原