低渗透油田水驱扩大波及体积技术探讨

Discussion on Expanding Swept Volume Technique of Water flooding in Low Permeability Oilfield

罗健辉 王平美 彭宝亮 李莹莹 耿向飞 丁彬 贺丽鹏

LUO Jianhui WANG Pingmei PENG Baoliang LI Yingying GENG Xiangfei DING Bin HE Lipeng

低渗透油田水驱开发效果的好坏取决于水是否“均匀”地驱替整个油藏。针对低渗透油田注水开发存在“注不进、采不出和堵不住”三大问题，分析了注不进水、采不出原油、堵不住水窜流的本质原因，提出了以下建议：（1）根据渗透率和裂缝具体情况，设计体膨颗粒（微球）与柔性颗粒组合，在裂缝沿程形成智能动态调驱段塞，抑制窜流问题，大幅度扩大注水波及体积；（2）通过攻关纳米材料的改性，赋予纳米颗粒减弱水分子间作用力的功能，实现注得进与采得出，大幅度扩大低渗透区域常规水驱不可及的波及体积。图4 表1参10

The effect of water flooding development in low permeability oilfield depends on whether the water is "evenly" displacing the whole reservoir. In view of the three problems of water injection development in low permeability oilfield，such as"no injection，no production and no blockage"，the essential causes of water injection，crude oil production and water plugging were analyzed. Two suggestions were put forward：（1）according to the specific circumstances of permeability and crack，design of swellable particle（microspheres）combined with flexible particles，formation of intelligent dynamic displacement control slug along fracture path，suppression of crossflow，greatly expand the swept volume；（2）by means of modification of nano materials，the particles were functionalized to weaken water molecular interaction，realizing the inject and recovery，greatly expanding the low permeability area swept volume，where conventional water flooding can not reach.

10.19346./j.cnki.1000-4092.2017.04.036