非混相泡沫段塞细分层注水关键技术

油藏储层内药剂吸附有效性和泡沫细分层注水长段塞连续注入方式容易导致气窜和吸液剖面反转,影响整体措施效果,采用目标油田油砂填制模型,考察药剂动态吸附后再生能力和泡沫综合性能,分析泡沫小段塞间隔注入和长段塞连续注入分流增产效果.结果表明:在多孔介质吸附后,不同药剂再生能力和泡沫综合性能下降,但随着驱替体积增大有效性逐步增强;泡沫小段塞间隔注入好于泡沫大段塞连续注入方式.渤海SZ36-1油田非混相泡沫段塞细分层注水单井试注表明,泡沫小段塞间隔注入比长段塞连续注入方式日增油提高23m3,日降水率提高2.6%,累计增油提高1.72×104 m3,有效期提高7个月以上,进一步验证泡沫小段塞间隔注入的技术优势.

Key technology for immiscible foam slug fine separate-layer water injection

According to chemicals in the reservoir after absorption of effectiveness,and foam fine separate-layer water injection long slug continuous injection way is easy to cause the steam breakthrough and absorb fluid profile reverse against the whole measure effect,using target reservoir oil sands to fill the model,investigating regeneration of agents after dynamic absorption and foam comprehensive property,contrasting foam small slug interval injection and long slug continuous injection effect of increase shunt.The results indicate that the different agents after absorption in porous media,regeneration and foam comprehensive performance decreased,but effective gradually increases as for flooding volume increasing;Foam small slug interval injection is better than long slug continuous injection way.Field application feedback that foam small slug interval injection can increase 23 cubic meter,water cut increasing by 2.6%,in all increased oil improve 17200 cubic meter,improving the validity of 7 months above than long continuous injection way,further verify the foam small slug interval injection technology is superiority.