低渗、特低渗油田注水开发见效见水受控因素分析——以鄯善油田、丘陵油田为例

The controlling factors analysis about waterflood response in special low permeability sandstone oilfield:taking Shanshan Oilfied and Qiuling Oilfield as examples

以特低渗的鄯善油田和丘陵油田为例,对特低渗油田注水开发见效见水受控因素进行了分析,研究表明:1特低渗油田注水开发见效见水的控制因素有砂体的连续性、储层的物性非均质程度、射开层数、注采比及地层压力情况;2地饱压差低的特低渗油田,注采比及地层压力情况是注水见效见水的首要控制因素,这类油田应尽早注水保持地层压力;3在某一物性范围内,物性非均质程度比物性好坏对特低渗油田注水见效见水的控制作用更为突出。这一研究结果对同类油田生产具有一定的指导意义。

The controlling factors about waterflood response in special low permeability sandstone oilfield are analysed.The study is useful reference to directing the similar oilfields. The research indicates that the controlling factors about waterflood response in special low permeability sandstone oilfield are the continuity of sand, the heterogeneous extent of reservoir′s physical property, the number of opened layers, the injectionproducing amount ratio and the formation pressure, and the reserch indicates the injectionproducing amount ratio and the formation pressure are the chief factors that control the waterflood response when the difference of formation pressure and saturation pressure is low,the water should be injected as soon as possible, and also indicates the heterogeneous extent of reservoir′s physical property is more important than physical property to control the waterflood response in the sandstone oilfield in some tims.