高渗透稠油油藏氮气泡沫驱现场实践与认识

八面河油田面14区沙河街组沙三上段属于高孔高渗透普通稠油油藏,受储层非均质性,注水、边水推进等原因,在油田开发过程中表现出含水上升快,产量自然递减快,采出程度低的开发特点。针对高渗透稠油油藏特高含水开发初期稳油控水,2007年开展了整体氮气泡沫驱现场试验,取得了显著的控水增油效果,投入产出比为1∶7.0。研究结果对于同类油田氮气驱提高采收率具有一定的借鉴意义。

On Nitrogen Foam Flooding Field Test of High Permeability Heavy Oil Reservoir

The upper side of the third member of Shahejie Formation in Mian14 Area Bamianhe Oil Field is a typical heavy oil reservoir featuring high porosity and permeability.Affecting by the heterogeneity,water flooding and flank water drive,the reservoirs had shown a quick increase of water cut while the natural decline of output also took on speed and recovery level stayed low during oil exploration.To stabilize oil production and control water cut during primary development of high permeability heavy oil reservoir with ultra high water content,the staff had launched a comprehensive nitrogen foam flooding field test which had accomplished significant improvement in water cut control and output spur with the input-output ratio at 1∶7.0.This result can offer references to raise recovery ratio by nitrogen foam flooding in similar oil fields.