带油环凝析气藏油气界面流体组成的确定

Determination of fluid composition of oil-gas contact in gas condensate reservoir with oil rim

赵超斌 夏朝辉 陈冬云 周德勇

中油国际海外研究中心，北京 100083 中国石油大学石油天然气工程学院，北京 102249 辽河油田分公司审计处，辽宁 盘锦 124111

凝析气藏组分数值模拟需要定义某一深度的流体组成及其状态参数，对于带油环凝析气藏来说，油气界面处定义油样还是气样，对油气储量及生产动态影响很大。以印尼某凝析气田取自同一油气水的油样H5（U3）和气样H5（U2）为对象，进行油气闪蒸试验。结果表明，气样闪蒸出的油与油样误差比油样闪蒸出的气与气样误差小，结合实际生产的要求，确定该凝析气藏数值模拟计算时油气界面处定义气样。

Fluid composition and EOS parameters to certain depth need to be defined for the compositional modeling of gas condensate
reservoir. With respect to the gas condensate reservoir with oil rim, it has a great effect on oil and gas reserves and production
performances that depends on oil or gas samples defined at gas-oil contact. Mutual flash experiments of oil and gas samples are
performed on oil sample H5 (U3) and gas sample H5 (U2) from the same gas-oil-water system in certain gas condensate field in
Indonesia. The result shows that the oil composite from gas samples flash is more appropriate than gas composite from oil samples.
Considering practical demand, the gas samples are defined at gas-oil contact while numerical simulation.