大庆长垣扶余油层储层特征及控制因素研究

发布时间：2018-05-27 05:38

本文选题：储层特征 + 控制因素　；参考：《东北石油大学》2017年硕士论文

【摘要】：大庆长垣扶余油层近几十年的勘探开发所动用的储层主要是中高渗油层,但随着勘探开发的深入发展,低渗透原油产量每年都在递增,低渗透储层已成为油气增储增产的新主力战场。因此,系统研究低渗透储层特征及深入剖析其优质储层成岩主控因素成为当前促进低渗透油层勘探开发的最急需最基础的工作任务。本论文针对大庆长垣扶余油层储层以低渗透为主,储层物性纵横向变化大、相对优质储层预测难的特点,综合运用石油地质学、光性矿物学、沉积岩石学和构造地质学等相关专业知识,结合储层研究技术方法,如偏光显微镜、扫面电镜、X-射线衍射仪以及图像分析软件系统等,开展低渗透含油区储层特征的综合研究。完成了研究区扶余油层岩石学特征及物性特征,储集空间类型及结构,储层成岩作用及储层控制因素的研究分析。研究结果表明:扶余油层中常规储层以低泥/钙含量的砂岩为主,致密储层中高泥/钙含量的砂岩比例增多;其中矿物组成对储层类型影响明显,石英和长石是形成储层的有利物质基础;扶余油层常规储层粒度组成主要为中细砂岩,而致密储层主要为粉砂岩,泥质含量较高,砂岩粒度对致密储层影响作用较弱,其粒度与物性相关性较差;在孔隙结构上,扶余油层常规储层喉道较粗,平均喉道半径在100nm~1000nm之间,而致密储层喉道较细,以50nm~500nm为主;机械压实作用、胶结作用以及溶蚀作用是对储层具有重要影响的成岩作用,其中机械压实作用对储层的破坏性最大,胶结作用破坏性主要在局部起主导作用,溶蚀作用是改善储层结构,形成储层的有利因素。
[Abstract]:The reservoirs used in the exploration and development of Fuyu reservoir in Daqing Placanticline in recent decades are mainly medium-high permeability reservoirs, but with the further development of exploration and development, the production of low-permeability crude oil is increasing every year. Low permeability reservoir has become a new main battlefield of increasing oil and gas reservoir and increasing production. Therefore, it is the most urgent and basic task to study the characteristics of low permeability reservoir and analyze the main diagenetic factors of its high quality reservoir in order to promote the exploration and development of low permeability reservoir. This paper aims at the characteristics of Fuyu reservoir in Daqing Placanticline, which is characterized by low permeability, large variation of reservoir physical properties in longitudinal and horizontal directions, and difficulty in predicting relatively high quality reservoirs. The comprehensive use of petroleum geology and photometric mineralogy is used in this paper. Combined with the technical methods of reservoir research, such as polarizing microscope, scanning electron microscope (SEM), X-ray diffraction (SEM) and image analysis software system, the comprehensive study of reservoir characteristics in low permeability oil-bearing areas is carried out. The petrological and physical characteristics of Fuyu reservoir, the type and structure of reservoir space, the diagenesis of reservoir and the controlling factors of reservoir have been studied and analyzed. The results show that the conventional reservoir in Fuyu reservoir is dominated by sandstone with low mud / calcium content, and the proportion of sandstone with high mud / calcium content in dense reservoir increases. Quartz and feldspar are the favorable material foundation for reservoir formation, the grain size composition of the conventional reservoir in Fuyu reservoir is mainly medium fine sandstone, while the dense reservoir is mainly siltstone, the content of clay is high, the influence of sandstone granularity on tight reservoir is weak, In pore structure, the throat of Fuyu reservoir is coarse, the average throat radius is between 100nm~1000nm, and the throat of dense reservoir is fine, mainly 50nm~500nm. Cementation and dissolution are diagenesis which has important influence on reservoir. Mechanical compaction has the most destructive effect on reservoir, the destruction of cementation is mainly in local area, and dissolution is to improve reservoir structure. A favorable factor in the formation of a reservoir.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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