注采参数对馆陶油层SAGD生产的影响研究

辽河油田根据自身条件首创性地提出了直井-水平井组合式SAGD开发方式,并进行了先导矿场试验。以辽河油田杜84块馆陶油层直井-水平井SAGD先导试验区为研究对象,运用油藏数值模拟软件研究了采注比、注汽速度、蒸汽干度等注采参数对直井-水平井SAGD开发效果的影响。综合考虑SAGD开发阶段的经济效益和油藏的采出程度,优化得到了合理的注采参数范围。并且,针对直井-水平井SAGD开发过程中可能出现的汽窜问题,提出了预防和控制措施。研究结果可以为类似稠油油藏采用直井-水平井组合SAGD开发方式提供理论参考。

Study of Injection Strategy Influences to SAGD Performance of Guantao Oil Reservoir

According to the specific heavy reservoir properties, Liaohe oilfield company proposed vertical-horizontal steam aided gravity drainage (VH-SAGD) method and applied in practical production. A reservoir numerical model was built for Guantao pilot block. The influences of injection parameters, such as injection production ratio, steam injection rate, and steam quality were analyzed with the numerical model. Taking a comprehensive evaluation of oil recovery rate and steam-oil ratio, optimized injection parameters were offered. As to different levels of steam channeling problem in VH-SAGD production process, variant methods were proposed to prevent or control steam channeling. Our research could provide a theoretical reference for other similar reservoirs.