【作者】 杨春生；

【导师】 马世忠；

【作者基本信息】 大庆石油学院 ， 矿产普查与勘探， 2009， 硕士

【摘要】 随着油田开发的不断深入,用科学合理的方法寻找剩余油是油田开发工作的主题。开展油田精细地质、储层流动单元、单砂体内部建筑结构研究,能够夯实油田开发的地质基础,为寻找剩余油提供依据。本文运用高分辨率层序地层学、精细沉积学理论,对榆树林油田东14区块扶杨油层进行了高分辨率层序地层、大面积密井网的沉积体系～沉积微相、储层分布研究,并建立相应的地质知识库,针对单砂体平面、层内(小层韵律性)非均质性已不能满足高含水期、三次采油阶段的需求,其既不能揭示单砂体内部物性空间变化及分布,更忽略了单砂体内非渗透薄夹层(多<30cm)对储层非均质性的影响,提出按反映单砂体成因、形成微过程及内部结构的储层建筑结构,研究单砂体内部三维非均质性的思想,并结合曲流点坝单一侧积体沉积模式及其侧叠模式,建立了“渗透率向凸岸、向上减小的新月形楔状侧积体,逐一斜列侧叠,其间被非渗透侧积薄夹层隔开”的曲流河道砂体“建筑结构控三维非均质模式”,揭示了以往忽视的、但对单砂体内部三维非均质性至关重要的不渗透薄夹层及其遮挡-阻流格架;也由此客观地揭示了单砂体内部物性基本单元(侧积砂体)及其三维分布规律,从而真正反映了单砂体内部三维非均质性的本质,并由此对单砂体内部渗流场、注入剂驱油和剩余油形成与分布产生的重要影响,这将对高含水期、三次采油阶段及其以后的剩余油研究、预测具有重要意义。更多还原

【Abstract】 With the constant deepening of field development, looking for remaining oil with scientific and reasonable methods is becoming the theme of the development of oil fields. A solid geological foundation can be made by carrying out researches of detailed oilfield geology, reservoir flow units, and internal architecture of individual sandstone body, thus can provide a basis for looking for the remaining oil.Theories of high-resolution sequence stratigraphy and detailed sedimentology are used in this thesis, to do researches of high-resolution sequence stratigraphy, depositional system ~ sedimentary microfacies of large area infilled well pattern, and reservoir distribution, as well as establishing relevant geological knowledge base. In view of that two-dimensional and intrastratal(rhythmicity of sublayers) heterogeneity of individual sandstone body cannot meet the demands during the period of high water cut stage and tertiary phase, because it not only cannot reveal the spatial variation and distribution of a single sand body’s internal physical properties, but also neglected the affections on reservoir heterogeneity of impervious thin-interbeds (most of which are less than 30cm)in an individual sand body; The idea that three-dimensional heterogeneity within a single sand body should be studied according to the reservoir architecture which reflects its origin, forming process and internal structure is proposed. Combining depositional model of single lateral accretion body of meandering stream point bar and its lateral stacking model,“architecture controlled three-dimensional heterogeneous model”of the meandering stream channel sand body in which“crescent wedge-shaped lateral accretion bodies, in which permeability decreases upward and to the convex shore, are diagonal and lateral stacked one by one, and are isolated by impervious lateral accreting thin-interbeds”. Impermeable thin-interbeds and their shelter-barrier frame which was neglected before but is utmost important to internal three-dimensional heterogeneity of single sand body is revealed. And thus the basic unit of internal physical properties of a single sand body(lateral accretion sand body) and its three-dimensional distribution law are revealed objectively. So the essence of internal three-dimensional heterogeneity of a single sandbody is reflected, and great impact can be produced to internal seepage field of a single sand body, formation and distribution of injectant displacing oil and remaining oil. There will be great significance to study and prediction of remaining oil during high water cut stage, tertiary oil recovery phases and posterior period.更多还原