分层示踪剂测试技术在合采合注油藏开发中的应用

Application of Multi-tracer Testing in Multi-layered Reservoirs Development in High Water Cut Period

针对单一示踪剂测试技术存在的只能计算出水淹层的厚度、渗透率及孔道半径等地层参数,而不能对剩余油定量化研究做出精确计算,以及复杂断块油藏层系多的特点,采用微量物质水相示踪剂测试技术,考虑油水两相的油组份、水组份、分配性示踪剂、非分配性示踪剂等4个组份,建立两相4组份数学模型,然后采用黑油模型中的隐压显饱法来求解分小层压力和剩余油饱和度;通过增加示踪剂的类型,实施分层注水测试和多向受效的监测,建立油藏地质模型,利用数值法求解油藏各层压力和流线分布,最终定量描述剩余油的分布规律。通过在辛68-66井组现场应用取得了很好的效果,说明这种方法简单实用,解释精度较高,具有较高的推广价值。

The single tracer testing technology only calculates thickness, permeability and pore passage radius of water flood zones, but does not quantitatively and accurately estimate remaining oil saturation. The complex fault block reservoirs have many strata series. When developing well to well tracer interpretation software, we only consider oil-and-water two-phase, i. e. , oil component, water component, allocated tracer and non-allocated tracer （called as four-component）, based on which we have set up a two-phase ＆ four-component math model. Then, implicit pressure explicit saturation method in black oil model is used to resolve pressure and many remaining oil saturation in the substrata. The technology to increase the tracer types and inject different tracers into the layered water-injection intervals may present vertical and horizontal distribution of the remaining oil. Application of multi- tracer testing in Xin68-66 well group proved this technology is better.