绥中36-1油田试验区注水井吸水能力分析及稠油油田注水模式初探

绥中 36 1稠油油田试验区注水井吸水能力分析结果表明 ,吸水能力随井组含水上升增大并呈指数递增关系。据此设计了注水模式 ,其特点为 :地饱压差较小的稠油油田应早期注水 ;注水初期应采取较小的注水强度 ;注水强度应随含水上升逐渐增大 ;保持地层压力在泡点压力以上。该注水模式与传统注水模式有着本质的区别 ,即重视对注水井动态资料的管理与分析 ,在考虑到注水起始时间和压力保持水平的同时 ,根据地层实际吸水能力确定配注量。开采实践证明这种注水模式行之有效。该注水模式对其它油层多、厚度小的稠油砂岩油田的开发具有借鉴意义。

An analysis of water injectivity in the pilot area of SZ36-1 oilfield and a preliminary probing into water-injection mode of viscous oilfield

An analysis of water injectivity in the pilot area of SZ36*.1 viscous oilfield shows that the injectivity increases exponentially with the well group's water cut. Thus an injection mode is designed, and it can be characterized by: (1) An early injection should be made in the viscous oilfields with a smaller difference between formation and saturation pressure; (2) the lower intensity is proper in the initial water injection; (3) the injection intensity should be gradually increased as the water cut increases; and (4) the formation pressure should be kept above the bubble point pressure. The mode, essentially different from the traditional one, has focused on the management and analysis of injection performance data, and the actual injectivity is used to select the injection rate while the injection start time and formation pressure level are considered. A field development practice has proved the effectiveness of the mode, and it may be helpful to developing viscous fields with multiple thinner sand pays.