海上油田疏水缔合聚合物驱分级控制历史拟合方法研究

Study on History Matching of Hydrophobic Associating Polymer Flooding and Optimization of Polymer Injection Program in the Offshore Heavy Oil Field

常规的聚合物物化参数选取忽略了室内实验条件和地下油藏渗流条件的差异,导致室内实验参数偏理想化而产生拟合误差。针对此问题提出全新的聚合物驱历史拟合方法。首先根据水驱开发实践认识,结合动静态资料,拟合得到接近地下油藏实际的模型;然后以修正聚合物物化参数为主,修改静态模型为辅方法,注重分级控制理念,得到地下渗流聚合物驱模型和一套油藏规模物化参数;最后,优化注聚方案,进行方案预测。

The key point is the selection of polymer physicochemical parameters, due to the difference between in- door experimental conditions and underground reservoir flow conditions, polymer physicochemical parameters ob- tained from indoor experiments are idealistic. Therefore, this paper carries out brand - new history matching of pol- ymer flooding. A water flooding model, close to the actual underground reservoir, is obtained by history matching. Based on water flooding development understanding and combined static and dynamic data, and then according to dynamic understanding of polymer flooding, modifying polymer physicochemical parameters and static model, a pol- ymer flooding model and a set of reservoir - scale physical and chemical parameters are obtained. Finally, the pro- gram is optimized and the plan is predicted.