纳米微球调驱技术在某油田开发生产中的应用

Application of Nano Microsphere Profile Control Technology in Development and Production of an Oilfield

某油田的主力油层为明化镇组下段NmⅣ、Ⅴ,该油田I井组有1口水平注水井,3口生产井,单采同一砂体.由于采用水平井开发、地层非均质性较强等原因,导致井组注入水水流推进不均衡,沿优势水流通道突进,注入水低效或无效循环,生产井含水上升速度快,采出程度低.结合开采现状、砂体油藏物性、孔隙体积、产出潜能等因素,选择纳米微球调驱措施后,有效调整了该井组注水井吸水剖面,扩大了注入水波及体积,减缓了对应油井的含水上升速度,提高了原油采收率,取得了良好的应用效果.

The main oil reservoir in an oilfield is Nm Ⅳ an d Ⅳ in the lower Minghuazhen Formation,in which 1 horizontal water injection well and 3 production wells are in well group Ⅰ,and the same sand body is produced only. Due to the horizontal well development and strong formation heterogeneity,the injection water flow of the well group is pushed unevenly,along the dominant water flow channel,the injection water is inefficient or invalid circulation,the water cut of the production well rises rapidly and the recovery degree is low. Combined with the current situation of production,physical properties of sand body reservoir,pore volume,productivity potential and other factors,after selecting nano microsphere profile control, the water injection profile of this well group is effectively adjusted,the injected water wave and volume are expanded,the water cut rise speed of corresponding oil well is slowed down,the recovery rate of crude oil is improved,and good application effect is achieved.