哈南夫特地区阿三段AⅡ油组沉积相研究

发布时间：2018-01-25 05:22

本文关键词： 哈南夫特小层沉积微相沉积模式物性下限有利沉积相带　出处：《西南石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：哈南夫特地区在区域构造位置上位于二连盆地马尼特坳陷东部阿南凹陷的阿尔善构造带上,地处阿尔善断层下降盘。论文工区包括H22断块和H43断块。哈南夫特油藏属于特低孔中、低渗岩性油藏。本论文的研究内容是哈南夫特地区阿三段AII油组的沉积相。论文从哈南夫特地区的区域地质情况出发,以沉积岩石学、测井地质学、储层地层学等基本理论和方法为指导,利用大量岩芯、测井资料,将研究区66口井的阿三段AII油组进行了精细的小层划分与对比。阿三段AII油组划分为上部和下部,其中AII油组下部是本文的重点,又细分为AII-1、AII-2、AII-3、AII-4、AII-5、AII-6、AII-7七个小层。在岩石类型、颜色、组分、沉积构造等沉积学标志、测井曲线标志、地震相标志识别的基础上,开展了单井沉积相分析以及连井沉积相对比,认为哈南夫特地区阿三段AII油组上部发育滨浅湖亚相,下部发育扇三角洲前缘亚相。滨浅湖亚相发育滨浅湖泥和滩坝砂两种微相；扇三角洲前缘亚相发育水下分流河道、河道侧缘、河口坝和前缘席状砂四种微相,其中前缘席状砂仅在少数单井上可识别。在此基础上,在AII油组下部以小层为等时单元编制了哈南夫特地区阿三段AII油组下部各小层沉积微相图,明确了沉积相平面展布规律,建立了沉积模式。通过对哈南夫特地区阿三段AII油组下部储层物性分析,认为工区AII-7小层物性最好,AII-6小层物性其次,AII-4小层物性最差；确定了储层的物性下限：孔隙度大于或等于4.3%；渗透率大于或等于0.2x10-3μm2。基于沉积微相研究和小层物性分析,有利储集相带是水下分流河道砂体,河道侧缘砂体、河口坝砂体次之。
[Abstract]:The Hananfte area is located in the Arshan structural belt in the Anan sag in the eastern Manitte depression of Erlian basin in the regional tectonic position. Located in Alshan fault descending plate, the paper includes H22 fault block and H43 fault block. Hanaoft reservoir belongs to very low porosity and low permeability lithologic reservoir. The content of this paper is the sedimentary facies of the AII oil formation of the third member in Hananfte area. Based on the regional geological conditions of Hananfte area, the paper starts with sedimentary petrology and logging geology. Under the guidance of reservoir stratigraphy and other basic theories and methods, a large number of core and logging data are used. The AII oil formation of A3 formation in 66 wells in the study area is divided into fine sublayer division and correlation. The AII oil formation of A3 formation is divided into upper and lower parts, among which the lower part of AII oil formation is the focus of this paper. It is further subdivided into seven sublayers of AII-1 / AII-2 / AII-3 / AII-4 / AII-5 / AII-6 / AII-7. On the basis of sedimentary markers such as rock type, color, composition, sedimentary structure, logging curve and seismic facies, single well sedimentary facies analysis and sedimentary facies correlation are carried out. It is considered that the upper part of the AII oil formation of the third member of Hananfute area is characterized by shallow lacustrine subfacies, and the lower part of the formation develops fan delta front subfacies, and the shoreline shallow lacustrine subfacies and the beach bar sand microfacies are developed. Four microfacies are developed in the front of fan delta, such as underwater distributary channel, channel lateral edge, estuarine bar and front mat sand, among which the front sheet sand can only be identified on a few single wells. The sedimentary microfacies diagrams of the lower part of the AII oil formation in the lower part of the AII formation of the Anan formation in Hananfte region were compiled in the lower part of the AII oil formation using the sub-layer as isochronous unit. The distribution law of the sedimentary facies was determined and the sedimentary model was established. Based on the analysis of the physical properties of the lower part of the AII oil formation of the third member of the Anan formation in Hananfte area, it is concluded that the physical properties of the AII-7 sublayer are the best and that of the AII-6 layer is the worst in the working area, and that of the AII-4 layer is the worst. The lower limit of physical properties of reservoir is determined: porosity is greater than or equal to 4.3; The permeability is greater than or equal to 0.2x10-3 渭 m2. Based on the study of sedimentary microfacies and the analysis of physical properties of small layers, the favorable reservoir facies zone is the underwater distributary channel sand body, the channel lateral sand body, and the estuarine bar sand body.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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