冀东浅层高孔高渗油藏多段塞吞吐提高采收率技术

Multi-stage slug huff and puff EOR technology for shallow high-porosity and high-permeability reservoirs in Jidong Oilfield

冀东浅层油藏属于特高孔特高渗油藏,边底水能量充足,含油面积小。经多年天然水驱开发,目前已进入特高含水阶段,注水、调驱、CO_(2)吞吐等常规措施无效,迫切需要改善开发效果,进一步提高采收率。在单砂体精细建模和历史拟合的基础上,利用油藏数值模拟方法分类,定量评价了高尚堡某断块某小层剩余油类型,针对该小层滞留型与残留型剩余油并重的特点,运用室内实验、数值模拟等多方法,优选出多段塞吞吐技术,为同类油藏提高采收率技术研究提供借鉴。

The Jidong shallow reservoir belongs to extra-high porosity and ultra-high permeability reservoir with abundant water energy at the bottom and a small oil-bearing area.After many years of natural waterflooding development,it has now entered the ultra high water cut stage,and conventional measures such as water injection,profile control,and CO_(2) stimulation are ineffective.Therefore,it is urgent to improve the development effect and further enhance the recovery rate.Based on single sand body fine modeling and history matching,the reservoir numerical simulation method was used to classify and quantitatively evaluate the remaining oil type of a certain small layer of a block in Gaoshangpu.Aiming at the characteristics of stranded type and residual type equal remaining oil in the small layer,through indoor experiment and numerical simulation method,etc.,the multi-stage slug huff and puff technology was optimized to provide a reference for the research of similar oil reservoirs to enhance oil recovery.