余华杰;

• 1:中海油研究总院开发研究院

摘要(Abstract)：

为制定含CO2凝析气藏的合理开发方式、提高凝析油和天然气采收率,分析开发过程中CO2对凝析气相态变化特征和开发指标的影响;利用高温高压多功能地层流体分析仪,进行含CO2体系凝析气样品单次闪蒸实验、等组分膨胀实验和定容衰竭实验,分析CO2对凝析气高压物性参数和相态特征的影响;运用Eclipse数值模拟软件模拟注CO2膨胀及CO2对凝析气藏开发指标的影响.结果表明:加大凝析气体系中CO2组分摩尔分数可增加闪蒸气的相对密度、减小偏差因数、增强弹性膨胀能力、降低最大反凝析压力及减少最大反凝析油量;反复多轮次循环回注CO2,可提高凝析油采收率26.2%,提高天然气采收率5.3%.对于高含CO2的凝析气藏或CO2气源充足的凝析气藏,充分利用CO2改善凝析气相态特征,可提高凝析油、天然气的采收率.

关键词(KeyWords)：CO2;凝析气;相态特征;开发指标;提高采收率

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2011ZX05030-05)

作者(Author):余华杰;

Email:

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