The accurate measurement of condensed water content in gas reservoirs is critical for the effective development of gas reservoirs. In this study, a more accurate and faster method for measuring the condensed water content in gas reservoirs was developed by using a high-temperature and high-pressure PVT device combined with the law of conservation of matter. A condensed water content test was subsequently conducted in the Dong Fang X (DF13) gas reservoir as an example to investigate the variation of condensed water content in gas reservoirs with different temperature and pressure. The results indicate that the condensed water content decreases with the increase in pressure, demonstrating a good exponential relationship, and vice versa. Based on the test results, a comprehensive prediction model for the variation of condensed water content in different sand bodies of the DF13 reservoirs with temperature and pressure was established, which could predict the precipitation of condensed water, thereby laying a solid foundation for the design of waterproof and water control strategies of the DF13 gas reservoir.

中文翻译：

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测量气藏冷凝水含量的质量平衡方法

准确测量气藏中的冷凝水含量对于有效开发气藏至关重要。在这项研究中，开发了一种使用高温高压PVT装置并结合物质守恒定律来测量气藏中冷凝水含量的更准确，更快速的方法。随后以东方X（DF13）气藏为例进行了凝结水含量试验，以研究不同温度和压力下气藏中凝结水含量的变化。结果表明，冷凝水含量随压力的增加而降低，表现出良好的指数关系，反之亦然。根据测试结果，