Abstract: The northern transitional zone of Area S has the characteristics of high water cut, low oil recovery rate, rapid production decline, rapid rise of comprehensive water cut and poor development effect in oilfield development. In order to improve the development effect of the transition zone, the test of steam flooding infill adjustment was carried out in three or four zones in the northern transition zone. In this paper, a fine structure model and a fine reservoir model were established for the test area, historical fitting and precision analysis were made for the geological reserves and production, and set adjustment was made for the test area. Therefore, the change rule of the index before and after well pattern infilling and the effect evaluation can also effectively solve the problem of low reserve utilization caused by poor reservoir development and poor physical property of crude oil in the transitional zone. The research in this paper can also effectively guide the adjustment of measures and the preparation of comprehensive schemes.

Key words: Steam flooding, Fine structure, Model history matching, Index prediction

摘要： S区北部过渡带地区在油田开发中具有含水率高、采油速度低、产量递减快、综合含水率上升速度快、开发效果较差的特点。对北部过渡区的第三和第四条带进行蒸汽驱油加密调整试验，使过渡带地区的开发效果得到明显提高。通过建立试验区精细构造模型及储层精细模型，对地质储量及生产情况进行历史拟合及精度分析，以及对试验区进行布井方案调整，从而明确井网加密前后指标的变化规律并进行效果评价，可以有效地解决过渡带地区因储层发育差、原油物性差造成的储量动用程度低的问题，并有效指导后期布井的措施调整及综合方案编制。

关键词: 蒸汽试验区, 　精细构造模型, 　历史拟合, 　指标预测