【作者】 张善义；

【导师】 马世忠；

【作者基本信息】 东北石油大学 ， 矿产普查与勘探， 2011， 硕士

【摘要】 随着大庆油田勘探开发的不断深入,如何在油田开发中后期高含水阶段利用科学、合理的方法寻找剩余油和开发油田是今后油田研究的主要方向。开展油藏精细描述和单砂体内部建筑结构研究,可以为寻找剩余油的分布,寻找新的油气储备和完善油田的开发方案提供科学的依据。本文运用小层对比理论、精细沉积学理论、储层沉积学、油气田开发地质学等对朝阳沟油田长43-39区块扶余油层进行了精细的对比,借助区域地质背景和岩心资料对研究区的沉积体系、沉积微相进行精细的研究,并建立了研究区沉积微相模式,总结了研究区点坝和废弃河道的识别方法,精细刻画了21张沉积相图。针对单砂体已不能满足高含水期以及三次采油阶段的需求,重点研究单砂体内部侧积体和非渗透薄夹层的分布,对指导以后的油田开发具有重要的指导作用。由于点坝内部薄夹层的非渗透性,造成点坝内部的非均质性特别严重,从而造成了油气分布的非均质性,影响了油气的分布。为了更好的研究薄夹层对油气分布的影响和寻找剩余油,以单砂体内部三维非均质性为指导思想,结合点坝内部侧积体垂向和平面上的侧叠模式,建立侧积体内的渗透率和孔隙度空间模式,即向凸岸、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点坝空间模式,并且分析了其形成的原因,从而真正反映了单砂体内部三维非均质性的本质,在此基础上建立了三维储层模型。为更好的挖潜剩余油和更好的开采点坝砂体提供了新的理论指导。更多还原

【Abstract】 With the continuous exploration and development of Daqing oil field, how to use scientific and reasonable method to develop oil fields in the late of oil field development and search for the remaining work is the subject of oil field development. To carry out detailed field geology and single sand body within the building structure, able to find new oil and gas reserves, find the distribution of remaining oil and improve the oil field development program provides a scientific basis.In this paper, it uses high resolution sequence stratigraphy, sedimentology fine theory, reservoir sedimentology, oil and gas field development of geology and so on to fine contrast the oilfield blocks long 43-39 Fuyu oil layer,uses the regional geological setting and core to study deposition system- fine sedimentary facies of study area, establishes sedimentary facies patterns in the study area and summarizes point bars of the study area,abandoned channel identification methods and fine characterization of the 21 sedimentary facies map. For a single sand body can not meet the high water cut and the demand for tertiary oil recovery stage, it ignores the impact of the single sand body impermeable thin sandwich (multi<30cm) on reservoir heterogeneity, summing up the single sand body genesis, the formation of micro-process and internal structure; using ideas of a single sand body within the three-dimensional heterogeneity with one side of the meandering point bar deposition model and the side of the integrated stack model, it establishes of a "porosity and permeability to the convex bank crescent-shaped wedge-shaped decrease upward lateral accretion, each echelon side of the stack, during which product is non-permeate side separated by a thin sandwich "and meandering channel sands" Structural control of three-dimensional heterogeneous model of "one side of the main Integrated depositional model, and analyzes the reasons for its formation. Thus it truly reflects a single sand body within the three-dimensional nature of heterogeneity, in this basement to establish a three-dimensional reservoir model. This has the important impact on the internal flow field of a single sand body, flooding into the agent and distribution of remaining oil, which will be important for ertiary oil recovery stage, high water cut staget and after the stage for forecasting and studying residual oil,which for the future point bar sand mining plan provides a new theoretical guidance.更多还原