油水运动追踪技术在高含水后期油藏数值模拟中的应用

高含水后期随着油田开发的深入,多数油井已是高含水,如何精细地描述储层内流体的运动、判断油井的主要来水方向、识别无效注水井是需要解决的一个问题.因此,介绍了油水运动追踪技术的方法,此方法可以有效地解决数值模拟中高含水后期无效注水的识别和不同层段、区域动用程度的确定等问题,可以更精细地掌握在不断变化的开采过程中,每口水井的注入水或某些层段、区域流体的渗流行为和特征.其基本原理是应用ECLIPSE数值模拟软件建立一个概念模型,通过示踪剂选件分别对每口注入井定义不同的水相示踪剂,对不同层或区域内的原油定义不同的油相示踪剂,通过分析模拟计算结果可识别无效注水井、识别某生产井的主要来水方向并能定量给出地层感兴趣区域内储量的动用情况.

The application of oil/water movement tracing technology in reservoir numerical simulation during late high water cut period

The water cut of many wells become extremely high with the thorough development of the Oil Field, how to describe precisely the fluid movement within the layers, distinguish the dominate coming water direction and identify invalid water injection wells have become problems eagerly waiting for solutions. Oil/water movement tracing technology is introduced in this article; the methodology could effectively solve the problems in reservoir numerical simulation during late medium -high water cut period, such as invalid water injection identification and the assessment of the production degree in different layers or zones. This method also helps to know the seepage behavior and feature of the injected water from every single water well or the fluid in certain layers and zones during the continuously changing recovering process. The mechanism of the method is that a concept model is established based on ECLIPSE numerical simulation software, different water - phase tracer agents are given to every injection well, and oil - phase tracer agents are given to different layers or zones, by analyzing the simulation calculated results, invalid water injection wells and the dominate coming water direction of a single producing well could be identified, furthermore, the production degree of the reserve in some interested areas within the layers could be quantified.