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在国内众多油田的勘探开发中,复合砂体内部不同级次的渗流屏障对地下油水运动,特别是剩余油形成与分布具有很大的控制作用,因此,地下单河道砂体的研究是提高油气采收率、最大限度地开发油气资源的关键。而在油田进入特高含水期开采阶段时,储层中的剩余油高度分散,可动用难度愈来愈大,必须系统地理清储层的非均质体系,深入研究砂体内部结构和流动单元等更深层次的问题。露头考察表明,很多看上去横向分布稳定的砂体实际上是复合河道砂体,由多条单河道砂体拼合叠置形成。单河
In the exploration and development of many domestic oilfields, different levels of seepage barriers within composite sand bodies have great control over the formation and distribution of underground oil and water, especially the remaining oil. Therefore, the research on underground single channel sandbodies is to increase the oil and gas Oil recovery, the maximum exploitation of oil and gas resources. When the oilfield enters the stage of extra-high water cut, the remaining oil in the reservoir is highly dispersed and can be used more and more difficultly. Therefore, the reservoir heterogeneity system must be systematically and systematically studied, and the internal structure and flow units And other deeper problems. Outcrop inspection shows that many sand bodies that appear to be horizontally stable are actually composite channel sand bodies that are formed by overlapping and stacking a number of single channel sand bodies. Single river