鄂尔多斯盆地马岭油田M区延10储集层精细地质特征研究

发布时间：2018-05-15 19:29

  本文选题：延10储层 + 储层评价　； 参考：《西安石油大学》2015年硕士论文

【摘要】：马岭油田M井区位于鄂尔多斯盆地陕北斜坡西部偏南处,主要的开发层序为侏罗系延安组延10储层。随着油田开发的不断深入,研究区地质研究薄弱,地质认识不够全面深入,无法满足油田进一步开发的需要。基于此开展了鄂尔多斯盆地马岭油田M区延10储集层精细地质研究,为下一步的勘探及开发建产工作打好坚实的基础。本论文依据研究区岩心、测井及生产动态资料,首先开展了研究区地层划分与对比,建立了研究区精准地层对比格架,揭示了研究区砂体顶部微构造特征、分析了砂体厚度平面展布特征;其次开展了储层电性特征研究,揭示了储层电性宏观分布特征、分析了储层电性特征,进而开展了储层参数解释模型建模研究,基于四性关系分析,建立了储层泥质含量、孔隙度、渗透率和含油饱和度测井解释模型;再次,分别开展研究区沉积微相和非均质性研究,详细刻画研究区储集层沉积特征和非均质性特征;最后基于研究区储层特征开展了流动单元研究,并利用生产动态资料对流动单元划分进行验证。研究表明:研究区延10储层发育延101、延102两个小层。研究区位于构造鼻隆上,延10各油组属于西倾单斜构造,呈现出中部高、四面较低、北东部较为平缓的变低的鼻状隆起局部马鞍状隆起,鞍部走向为东西向,构造特征具有一定的继承性,并且延102构造幅度变化较大。研究区砂体平面上呈现条带状分布,具有较好的延伸性,并且西南部砂体厚度较大。本区延10油层孔隙度分布范围为15-18%,平均孔隙度16.7%,渗透率分布范围4-32×10-3μm2,平均为8.6×10-3μm2,研究区延10层位于河间丘上,其含油性受古地貌及岩性共同控制,为典型的构造岩性油气藏。顶部的延101为主要的含油层系,含油饱和度较高,下部的延102,为边底水,属于水层。本区延10储集层渗透率与孔隙度有较好的相关性,在研究区中部表现出物性最好;延10油层组主要沉积相为边滩沉积、天然堤、河漫滩沉积。延10的储集层和油气分布受曲流河沉积影响,呈由南西向北东方向的条带状分布,至东北部河道消失;在延10储层中,延101的非均质性较弱,延102非均质性较强。本区延10油藏在平面分布上受构造、沉积微相、储集层非均质性影响显著,沿着河道方向,尤其是在研究区中部含油饱和度较高;以取心井的孔隙度、渗透率、流动层带指数等参数进行样品聚类分析,在此基础上对非取心井进行判定,划分出能综合反映储层储集、渗流及含油气性等多种信息的Ⅰ类、Ⅱ类、Ⅲ类流动单元;本次研究的开展和完成,为油田下一步油藏的挖潜工作奠定了基础,同时对邻区地质工作的开展具有参考意义。
[Abstract]:M well area in Maling Oilfield is located in the south west of northern Shaanxi slope in Ordos Basin. The main development sequence is Yan10 reservoir of Yanan formation of Jurassic system. With the deepening of oilfield development, geological research in the research area is weak and geological understanding is not comprehensive enough to meet the needs of further development of oil field. Based on this, the fine geological study of Yan 10 reservoir in M area of Maling Oilfield in Ordos Basin has been carried out, which will lay a solid foundation for the next exploration and development work. Based on the core, logging and production data of the study area, the stratigraphic division and correlation of the study area are first carried out in this paper, and the correlation framework of the precise formation in the study area is established, which reveals the characteristics of microstructures at the top of the sand body in the study area. Secondly, the characteristics of reservoir electrical properties are studied, the macroscopic distribution characteristics of reservoir electrical properties are revealed, the characteristics of reservoir electrical properties are analyzed, and the modeling of reservoir parameter interpretation model is carried out. Based on the relationship analysis of four properties, the logging interpretation models of shale content, porosity, permeability and oil saturation are established. Thirdly, the sedimentary microfacies and heterogeneity of the studied area are studied respectively. The characteristics of reservoir deposition and heterogeneity in the study area are described in detail. Finally, the flow unit is studied based on the reservoir characteristics in the study area, and the division of the flow unit is verified by using the production dynamic data. The results show that there are 101 and 102 sublayers in Yan 10 reservoir in the study area. The study area is located on the structural nose uplift, and each oil group of Yan 10 belongs to the westernized monoclinal structure, with a high middle, low four sides, a lower local saddle uplift in the east and north, and an east-west direction of the saddle. The structural characteristics have certain inheritance, and the amplitude of extension 102 structure changes greatly. The sand bodies in the study area show strip distribution in the plane with good extensibility, and the thickness of the sand bodies in the southwest is larger. The porosity distribution ranges from 15 to 18, average porosity is 16.7m, permeability distribution ranges from 4-32 脳 10 -3 渭 m 2 to 8.6 脳 10 -3 渭 m 2 in this area. The 10 layers in the study area are located on the Hejian hill, and their oil content is controlled by paleogeomorphology and lithology together, which is a typical structural lithologic reservoir. The extension 101 at the top is the main oil-bearing system, and the oil saturation is higher, and the extension of the lower part is 102, which is the edge and bottom water and belongs to the water layer. The permeability and porosity of Yan 10 reservoir in this area have good correlation, and the physical properties are the best in the middle of the study area, and the main sedimentary facies of Yan 10 reservoir group are shoal deposit, natural embankment and floodplain deposit. The reservoir and oil and gas distribution of Yan 10 are affected by meandering river sedimentation, which is a strip distribution from the south west to the north east, and disappears to the northeast river, while in the Yan 10 reservoir, the heterogeneity of Yan 101 is weak, and the heterogeneity of Yan 102 is stronger. The reservoir of Yan 10 in this area is obviously influenced by structure, sedimentary microfacies and reservoir heterogeneity in plane distribution, and has high oil saturation along the channel direction, especially in the middle of the study area, in order to determine the porosity and permeability of coring wells, On the basis of sample cluster analysis of flow zone index and other parameters, the non-coring wells are judged, and the flow units of class 鈪，

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