【作者】 聂春林；

【导师】 马世忠；

【作者基本信息】 大庆石油学院 ， 矿产普查与勘探， 2010， 硕士

【摘要】 随着油田开发的深入,我国许多油田已进入高含水期,特别是大庆油田长垣,已进入特高含水期开发阶段,剩余油空间上分布零散,挖潜困难,面对4000万吨稳产重任,如何挖潜这些剩余油已成为目前提高采收率的重大难题。在剩余油分布的储层中,曲流点坝储层占了很大的比例,储层内部渗流场分布特征及三维建模、剩余油的形成与分布机制、挖潜手段的选择等一系列问题,是目前开发地质工作者面临的重大课题。尽管国内外大批学者从野外露头和现代河流沉积及地下单砂体精细解剖等方面进行了探索,但尚未完全从机理上揭示曲流点坝内部建筑结构对渗流场的控制作用,更没有形成一套完整的达侧积体级的三维建模数模方法,搞清剩余油的形成与分布困难大,无法进一步给出相应的挖潜措施。单砂体内部建筑结构对储层的非均质性具有重要的控制作用,剩余油受侧积夹层空间建筑结构及单一侧积体内部渗透率空间变化、4级界面阻流等影响,主要分布在储层的中上部。运用沉积学原理和层次分析理论,对砂体内部建筑结构进行了精细研究;通过侧积界面控制,建立了能刻画侧积夹层阻流,侧积体内部非均质变化的三维地质模型,更真实反应了点坝内部三维非均质变化,为曲流点坝储层挖潜提供了充分的地质依据,对挖潜措施的选择具有地质导向作用,为高效设计水平井提供了保障。同时,本文的研究成果对进一步进行曲流点坝储层数值模拟提供了科学的三维地质模型,具有重要的指导意义。更多还原

【Abstract】 With oil fields developing,many oil fields have gone into high water-cut period. Especially the Daqing oil field has went into later development stage of extra-high water-cut period. The distribution of remaining oil in space is highly scattered. Facing the task of 40 million ton production, how remaining oil was produced has become a great difficult problem of increasing recovery efficiency. The point bar of meandering stream channel accounted for a substantial proportion of reservoirs with containing remaining oil. Many problems, including distribution of internal filtration field, distribution mechanism of remaining oil and producing approaches, are great topics of development geologist. Although many experts domestic and abroad have carried out relevant study from outcrop, modern fluvial sediment and fine dissecting underground monosandstone, but, they haven’t completely revealed control of internal architecture of the point bar to field of filtration and how distribution mechanism of remaining oil was affected so far.Which internal architecture of monosandstone have important controlling action to the heterogeneity of reservoirs, and remaining oil mainly distribute the middle and upper of reservoirs, because of the architecture of internal interlayer in space, the satiric change of permeability in single lateral bedding, the choking of 4-level interface and so on. By principles of deposition and hierarchy analysis theory, the architecture of the sand bodies was refined; the outcome of this text provided full geological references for exploration of remaining oil in the point bar of meandering stream channel and had geological direction to selection of producing methods.;It provided a guarantee for the efficient design of horizontal wells. At the same time, the outcome of this text can play an important role for further study of numerical simulation of the point bar reservoirs.更多还原