大安油田扶余油层次生孔隙发育特征研究
发布时间：2019-05-10 08:44
【摘要】：大安油田区域构造位置位于松辽盆地南部中央坳陷区大安红岗阶地二级构造带中,研究区位于红岗—大安阶地上的最深洼槽轴线上,东邻大安凹陷。研究区的主要目的层位是扶余油层泉四段,主要的沉积背景是河控三角洲沉积。本论文对大安油田扶余油层的岩石学特征、岩相特征、物性特征以及特殊组分特征进行了分析,并对次生孔隙的形成机理进行了深入探究。大安油田扶余油层是典型的细、粉细砂岩超低渗—致密储层,微观孔喉结构对储层的物性与含油性有关键性影响。研究区储层物性总体特征表现为:储层物性较差,主要为特低孔-超低孔、超低渗-致密储层。按孔隙直径将孔隙类型分为三种:毫米级、微米级和纳米级孔隙,扫描电镜和压汞资料表明研究区孔隙类型以微纳米级孔喉为主。最后依据超低渗—致密砂岩微观孔隙结构表征技术确定了纳微米级孔隙的类型和特征,以及纳微米级孔隙结构参数表征。根据压汞资料将研究区储层物性分为三大类四亚类,即Ⅰ类、Ⅱ类及Ⅲ类,并把Ⅱ类细分为Ⅱa和Ⅱb两个亚类,建立了各类储层的分类标准。
[Abstract]:The regional structural position of Da'an Oilfield is located in the secondary structural belt of Da'an Honggang terrace in the central depression area of southern Songliao Basin. The study area is located on the axis of the deepest trough on the ground of Honggang Da'an stage and adjacent to Da'an depression in the east. The main purpose horizon of the study area is the fourth member of Fuyu Reservoir Quan, and the main sedimentary background is river-controlled Delta deposition. In this paper, the petrological characteristics, petrographic characteristics, physical properties and special component characteristics of Fuyu reservoir in Da'an Oilfield are analyzed, and the formation mechanism of secondary pores is deeply explored. Fuyu reservoir in Da'an Oilfield is a typical fine and siltstone ultra-low permeability and tight reservoir. The microscopic pore throat structure has an effect on the bond between physical properties and oil content of the reservoir. The overall characteristics of reservoir physical properties in the study area are as follows: the reservoir physical properties are poor, mainly ultra-low porosity-ultra-low porosity, ultra-low permeability-tight reservoir. According to the pore diameter, the pore types are divided into three types: millimeter, micron and nanometer pores. Scanning electron microscope and mercury injection data show that the pore types in the study area are mainly micro and nano pore throat. Finally, according to the microscopic pore structure characterization technique of ultra-low permeability tight sandstone, the types and characteristics of nano-micron pores and the characterization of nano-micron pore structure parameters are determined. According to the mercury injection data, the reservoir physical properties in the study area are divided into three categories and four subcategories, namely, class 鈪，
本文编号：2473511
[Abstract]:The regional structural position of Da'an Oilfield is located in the secondary structural belt of Da'an Honggang terrace in the central depression area of southern Songliao Basin. The study area is located on the axis of the deepest trough on the ground of Honggang Da'an stage and adjacent to Da'an depression in the east. The main purpose horizon of the study area is the fourth member of Fuyu Reservoir Quan, and the main sedimentary background is river-controlled Delta deposition. In this paper, the petrological characteristics, petrographic characteristics, physical properties and special component characteristics of Fuyu reservoir in Da'an Oilfield are analyzed, and the formation mechanism of secondary pores is deeply explored. Fuyu reservoir in Da'an Oilfield is a typical fine and siltstone ultra-low permeability and tight reservoir. The microscopic pore throat structure has an effect on the bond between physical properties and oil content of the reservoir. The overall characteristics of reservoir physical properties in the study area are as follows: the reservoir physical properties are poor, mainly ultra-low porosity-ultra-low porosity, ultra-low permeability-tight reservoir. According to the pore diameter, the pore types are divided into three types: millimeter, micron and nanometer pores. Scanning electron microscope and mercury injection data show that the pore types in the study area are mainly micro and nano pore throat. Finally, according to the microscopic pore structure characterization technique of ultra-low permeability tight sandstone, the types and characteristics of nano-micron pores and the characterization of nano-micron pore structure parameters are determined. According to the mercury injection data, the reservoir physical properties in the study area are divided into three categories and four subcategories, namely, class 鈪，
本文编号：2473511
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