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基于大芦湖油田S34砂层组的生产资料,利用采收率经验公式和水驱特征曲线法预测砂层组四小层的最终采收率,并研究注入倍教增长率、存水率和水驱指数的变化规律,以评价砂层组的开发效果。研究结果表明:42小层和43小层剩余可采储量丰富,是大芦湖油田挖潜的主要目的层段;42小层水驱开发稳定、效果好;43小层和44小层水驱效果差;45小层水驱效果较好,但刺余可采储量少,只需维持稳定生产。研究构成的开发效果评价体系对注水油田开发效果分析具有重要的指导作用,并为同类油藏的开发效果评价提供借鉴。
Based on the production data of S34 sand layer group in Daliu Oilfield, the final recovery ratio of four layers in sand layer group was predicted by empirical formula of recovery and water flooding characteristic curve, and the effects of injection rate, water storage rate and water Drift index changes in order to assess the development of the sand group effect. The results show that the remaining recoverable reserves in the 42 and 43 sub-layers are abundant, which is the main purpose of tapping potential in the Dalihu Oilfield. The development of 42 sub-layer water flooding is stable with good results. The effect of 43 sub-layer and 44 sub-layer water flooding is poor The effect of 45 sub-layer waterflooding is better, but the residual recoverable reserves are less, so long as stable production is maintained. The evaluation system of development effect constituted by the research has an important guiding role in the analysis of the development effect of waterflooding oilfields and provides reference for the evaluation of the development effect of similar reservoirs.