示踪剂数值模拟技术在H油田双台阶水平井中的应用

Application of Trace Numerical Simulation in Two Sub-layer Horizontal Well of H Oilfield

H油田薄砂层油藏首创采用边缘环状和中间点状的双台阶水平井注水开发,如何开展双台阶水平井水驱动态监测是一个全新的课题。目前利用示踪剂模拟方法定性判断注入水波及方向、范围以及寻找高渗透条带方面的技术已相对成熟,而定量研究方面较少。建立了示踪剂迁移模型,用于定性研究注入水优势方向、注入水突破时间,边水入侵情况,并指导薄砂层油藏2008-2009年注水井调整配注11井次、新投注水井2口,注采调整后累计增油4.2 631万t,改善了油田开发效果。

H oilfield is the first used two sub-layer reservoirs,so how to develop the dynamic monitor is a new problem.The numerical simulation used in qualitative analysis of the advantage direction of the edge water is very mature,but the quantitative research is very few.This paper produces a numerical model for transport and multiphase fluid flow in H reservoir.The spot result shows this model can calculate breakthrough time of injection water and breakthrough time of edge water.This result is used to adjust water injection of 11 injection wells and add 2 new injection wells.The reservoirs increased 42.361 thousand tons through this flood pattern modification.