吐哈油田3大主力油区目前处于中高含水开发阶段。在剩余油分布研究中,以高分辨率层序地层对比和沉积微相研究为基础,建立了精细的储层预测模型,在该模型基础上,结合硼中子寿命、RST储层饱和度、CHFR过套管电阻率等先进测井技术和保压密闭取心等多项新技术求取井点及层内剩余油饱和度,并运用数值模拟和综合分析方法详细研究了剩余油在层内、层间、平面的分布规律。结果表明,不同的韵律层内纵向上水驱油特征相近,扫油厚度系数都很高,水淹后挖潜余地很小;纵向上物性较差、吸水状况差的层,平面上非均质较强的区域以及同井之间区域,是现阶段剩余油的主要富集区,也是今后挖潜的主要对象。

At present three main reservoirs in Tuha oil field have been in middle or high water-cut stage. According to the fluid flow properties of high water-cut stage, refined predicting model for formation was constructed on the basic of researches of high resolution sequence stratigraphic correlation and depositional microfacies. Residual oil saturation between wells and layers was obtained by using new technique such as boron neutron lifetime log, RST,CHFR and pressure maintenance sealing coring.