液流空化储层改造技术在XX油田J50H井应用分析

Application of Fluid Cavitation Reservoir Reconstruction Technology in Well J50h of XX Oilfield

液流空化储层改造技术,是通过油管将空化器下入指定位置,通过高速液流循环在井下液体内激发空化效应,产生的激波在储层中传播诱发多级空化,贯通和制造大量的微裂缝,改变微观孔隙结构,疏通孔喉通道,提升储层的渗流能力,达到增产增注的效果。XX油田J50H井于2019年10月5日投产,投产后较同层位生产的周边井一直存在产量低、生产流压低、井筒压力恢复慢的情况,对比分析资料显示,主要原因是油层内存在物性夹层,夹层的存在导致井眼和下部油层沟通不好,单独上部油层产能有限;同时存在一定污染堵塞导致该井油藏潜力没有完全释放。因此,针对该井采取了液流空化储层改造技术,取得了良好的油井增产效果。

Fluid cavitation reservoir reconstruction technology refers to putting into the designated location through the tubing cavitation,and stimulating cavitation effect in the underground liquid through the high-speed fluid circulation generating the shock wave propagation in the reservoir induces multistage cavitation,penetrates and makes a large number of micro-cracks,changes the micropore structure,dredges the pore throat channel,enhances the reservoir flow capacity,to achieve the effect of increasing production and injection.The well J50 h in XX oilfield was put into production on October 5,2019.After the well was put into production,compared with the surrounding wells in the same layer,there were low production,low production flow pressure and slow recovery of wellbore pressure.The comparative analysis data show that the main reason is that there is a physical interlayer in the reservoir,which leads to poor communication between the wellbore and the lower reservoir,and the productivity of the upper reservoir alone is limited.In addition,the reservoir potential of the well is not fully released due to the plugging.Therefore,the liquid flow cavitation reservoir reconstruction technology is adopted for the well,which can effectively remove the organic block near the well zone,and transform the reservoir,enhance the permeability of the reservoir,and obtain good oil well stimulation effect.