Z411块敏感性稠油油藏蒸汽吞吐开采数值模拟研究

针对Z411块油藏地质特征．开展了稠油蒸汽吞吐开采数值模拟研究。建立了地质模型，进行了生产动态历史拟合．对Z411块吞吐开采注采参数进行了优化及生产动态预测。经过注采参数的优化研究．最佳注采参数为：注汽量第一周期1000t．第二周期1100t．第三周期1200t．第四周期及后续周期1400t。生产井排液速度30t／d；最小井底流压2．0MPa。对王庄油田Z411块蒸汽吞吐开采的采收率、累积产油、累积油汽比等开发指标进行了预测。

Numerical Simulation on Steam Soak in Sensitivity Heavy Oil Reservoirs of Fault Block Z411

A numerical simulation is conducted on steam soak production in heavy oil reservoirs in combination with the characteristics of reservoir geologic characters in Fault Block Z411.A geologic model is established and a history matching is performed on the production performance.The parameters of injection and production are optimized and the production performance is predicted for steam soaking in the block.By studying the optimized injection-production parameters the optimized parameters are established,which include the amount of steam injection is 1000t in the first period,the second period is 1100t,the third is 1200 t,the 4th and consequent periods are 1400 t.unloading speed in production wells is 30 t/d,the minimum bottomhole flow pressure is 20 MPa.The software is used to predict the production indexes of steam soak in Fault Block Z411,including recovery factors,accumulated oil production,accumulated oil and steam ratio.