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双河油田Ⅴ上层系综合含水高达95.21%,已进入特高含水开发后期,层间层内非均质性严重,层间动用状况差异大,主力油层水淹严重。分析了Ⅴ上层系开发中所面临的主要问题:油水井井距大,井网不完善,注水利用率低,注水井吸水剖面不均匀。利用油水井测井测试资料和油藏数值模拟方法,明确了特高含水开发后期剩余油潜力分布。指出下步的调整方向是油层边角部位、断层附近的剩余油富集区和剩余储量高的部位。提出了井网完善调整、调剖封堵大孔道、三次采油等技术,应用于现场实际中,取得了明显的降水增油效果,提高了水驱采收率,形成了一套特高含水开发后期提高采收率技术,对非均质油藏改善开发效果有借鉴作用。
The comprehensive water content of the upper Ⅴ system in Shuanghe Oilfield has reached 95.21%, which has entered the later stage of ultra-high water-cut development. The heterogeneity in the interlayer is serious, and there are big differences in the utilization status between layers. The flooded main oil layer is serious. The main problems in the development of the Ⅴ upper strata are analyzed. The well spacing is large, the well pattern is imperfect, the water injection utilization rate is low, and the water injection profile is not uniform. Using the well test data and reservoir numerical simulation method of oil and water well, the potential distribution of remaining oil in the late stage of ultra-high water-cut was clarified. It is pointed out that the adjustment direction of the next step is the corner corner of the reservoir, the remaining oil-rich area near the fault and the site with high residual reserves. Put forward the technologies of well pattern adjustment, profile control and plugging of large channels and tertiary oil recovery, which are applied to the field practice. Obviously, the effect of precipitation and oil increase has been achieved and the waterflood recovery has been improved, forming a set of ultra-high water-cut development Late recovery enhanced technology, non-homogeneous reservoir to improve the development effect of reference.