低渗透裂缝型油田长效智能深部调驱技术

Long Term Intelligent In-depth Profile Control Technology for Low Permeability Fractured Oilfield

王平美 罗健辉 林远平 彭宝亮 丁 彬 贺丽鹏 耿向飞

WANG Pingmei LUO Jianhui LIN Yuanping PENG Baoliang DING Bin HE Lipeng GENG Xiangfei

针对低渗透裂缝油田注水开发过程中低效或无效循环的突出问题，介绍了通过以柔性颗粒为主体段塞、微球和体膨颗粒等作预置段塞和保护段塞的长效智能深部调驱段塞组合技术，研究了柔性颗粒的特性，比较了柔性颗粒单一段塞和组合段塞在现场的应用情况。研究结果表明，柔性颗粒耐温抗盐性、抗拉伸性和回复性良好；在地层中具有堵塞/变形通过和二次黏结能力，可有效填充和封堵裂缝，达到智能沿程动态深部调驱和动态扩大波及体积的目的。现场应用结果表明，柔性颗粒单一段塞可以实现深部液流转向和深部沿程动态调剖，增油降水效果较好；柔性颗粒、聚合物微球和体膨颗粒组合段塞能达到甚至超过柔性颗粒单一段塞的增油降水效果，并大幅降低柔性颗粒的用量，节约成本。图 4表 5参 16

Based on the critical problems of low efficient or invalid circulation during waterflooding development in low permeability and fractured oilfield，this paper introduced a long term intelligent in-depth profile control slug combination technology，which used flexible particles as main slug，soft micro gel ball and swellable particles as preset slug and protective slug.The characteristic of flexible particle was studied，and the field applications of flexible particle single slug and combination slug were compared. The experiment results showed that the flexible particle had excellent temperature resistance，salinity tolerance，stretching resistance and resilience. The flexible particle had plug，deformation and secondary bonding capacity in reservoir，which was efficient to fill and plug fracture and realized the purpose of intelligent，dynamically on-way and in-depth profile control and dynamical expansion of sweep volume. The field application results showed that in-depth flow diversion and dynamical profile control could be realized by flexible particle single slug，which was good for increasing oil production and decreasing water cut. The combination slug which consisted of flexible particle，soft micro gel ball and swellable particles could reach even beyond the flexible particle single slug on the effect of increasing oil production and decreasing water cut，and significantly reduce the amount of flexible particle and save cost.