A new method to determine critical condensate saturation

作者：Li Qian^*; Li Xiangfang; Zan Ke; Li Yanjing; Song Zhaojie

来源：Acta Petrolei Sinica, 2010, 31(5): 825-828+833.

• Condensate flow
• Condensate recovery
• Condensate reservoirs
• Critical condensate saturations
• Dew pressure
• Flow characteristic
• Gas chromatographs
• Irreducible water
• Key parameters
• Mixed fluids
• Numerical simulation
• On flow
• Porous Media
• Significant impacts
• Well productivity

The critical condensate saturation is a key parameter to reflect condensate flow capacity, and it has a significant impact on condensate recovery, gas-well productivity and stable production period. Therefore, the critical condensate saturation has been continuously a hot issue in researches both at home and abroad. A new method was established to determine the critical condensate saturation by means of a long-core displacing apparatus and a gas chromatograph. Applying this method, two experiments were performed on a real core from a condensate reservoir and on a C1~C5 mixed fluid, their critical condensate saturation was 3.04% and 4.66%, respectively. The results obtained from analyses on flow characteristics of condensates indicated that the critical condensate saturation was very low. The comparison of the two experiments showed that porous media would raise the dew pressure of fluids, and both irreducible water and large difference in pressure were conducive to the flow of condensates. Finally, this low critical condensate saturation was verified using a numerical simulation.

• 出版日期2010
• 单位中国石油大学（华东）