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流线法通过建立可视化三维流场分布,可进行流体流场及油水分布研究,揭示优势通道的存在与分布,形象描述流体在地下流动的方向和区域。针对大庆油田杏一～二区东部Ⅱ块含水大于98%的比例较高,且多位于基础井网注水井附近或位于基础井网注采井的主流线上,分析认为主要由于井间存在优势通道,造成低效无效循环,使得部分采出井含水较高。为此,在精细地质研究基础上,结合流线法数值模拟成果作出相应调整,控制了低效无效循环,改善了区块开发效果。
Streamline method through the establishment of visual three-dimensional flow field distribution, fluid flow field and oil-water distribution can be studied to reveal the existence and distribution of the dominant channel, the image describes the fluid flow in the underground direction and region. Aiming at the high ratio of water content of more than 98% in Block Ⅱ in the eastern part of Xingyi-Ⅱ District in Daqing Oilfield, it is mostly located near the water injection well of basic well pattern or in the mainstream of well pattern of well pattern of basic well pattern. Passage, resulting in inefficient and ineffective circulation, making part of the mining wells higher water content. Therefore, on the basis of fine geological study, combined with the results of numerical simulation of streamline method, the ineffective invalid cycles are controlled and the effect of block development is improved.