准噶尔盆地风城地区白垩系油砂矿藏描述

发布时间：2018-03-07 11:37

本文选题：风城地区　切入点：油砂矿　出处：《中国石油大学(华东)》2015年硕士论文　论文类型：学位论文

【摘要】：风城油砂矿藏位于准噶尔盆地西北缘,是我国油砂资源最为丰富的地区,目前该区处于开发初期,对目的层白垩系清水河组的沉积、储层特征、油砂分布等认识不足,需通过全面开展油砂矿藏地质特征研究,确定油砂富集层位及区块,为下一步开采提供地质依据。本文综合利用岩心、测井、钻井、分析化验、试油试采等资料,以沉积学、储层地质学、储层评价技术等多学科理论为指导,首先确定区域地层划分标志,对白垩系清水河组进行地层划分与对比;在此基础上通过取心井的观察分析,结合砂体展布特征,进行沉积微相的研究,将目的层划分为水下分流河道、水下分流河道间、辫状河道和心滩等几类沉积微相。利用测井解释成果、薄片、扫描电镜及压汞等资料,开展了储层微观和宏观特征研究,确定了储集空间类型和孔喉结构特征,从层内、层间、平面三方面对储层宏观非均质性进行研究,表明由K1q23、K1q22至K1q21砂层组层内非均质性逐渐减弱,层间及平面非均质性增强;通过“权重”评价法将储层分为四类,其中I类、II类为本区最有利的储层,主要分布在1号矿内,孔隙度多大于31%,平均渗透率约1294.7×10-3μm2,为特高孔、高渗型储层;原油分析显示油砂油族组分以非烃和沥青质为主,饱和烃和芳烃含量较少,说明其遭受了严重的生物降解。通过上述研究总结了油砂成矿富集规律,研究区油砂分布主要受沉积微相、储层非均质性、断裂和不整合面的分布及地层埋深等因素的影响;平面上油层主要分布在FS73断块、FZ007断块、Z1断块和Z32断块附近,纵向上K1q23砂层组内部油层发育最好,含油范围广,为油砂主要富集层。最终在相控约束下,采用随机建模方法建立了目的层三维地质模型,分别对储层属性参数(孔隙度、渗透率、含油饱和度)的空间展布情况进行预测,结果与研究区实际发育情况较吻合。
[Abstract]:Fengcheng oil sands deposits located in the northwestern margin of Junggar basin, is China's most abundant oil sand resources area, the area is in the early stages of development, for the purpose of sedimentary layer of Cretaceous Qingshui River formation, reservoir characteristics, distribution of oil sands lack of understanding, through the research characteristic of mineral sands, determine the oil sands rich layer and block that provides the geological basis for the exploitation of the next step. This paper uses the core, drilling, logging, analysis and test, test data, oil production in sedimentology, reservoir geology, reservoir evaluation technology and other disciplines theory, first determine the regional stratigraphic division, the Cretaceous Qingshui River formation of stratigraphic division and correlation; based on the observation and analysis of coring wells, combined with the characteristics of sand body distribution, sedimentary microfacies, the objective layer is divided into underwater distributary channel, underwater distributary channel and braided channel and heart The beach and other types of sedimentary microfacies. The logging interpretation results, slice, scanning electron microscope and mercury injection data, the microscopic and macroscopic characteristics of reservoir space types and characteristics, pore structure, reservoir, from the inner layer, interlayer and plane three aspects of macroscopic heterogeneity of reservoir research. As indicated by the K1q23, K1q22 and K1q21 sand group layer heterogeneity decreases, interlayer and plane heterogeneity enhancement; by using the weight evaluation method of reservoir will be divided into four categories, including I class, II class is the most favorable reservoir in this area, mainly distributed in the No. 1 mine, multi porosity more than 31%, the average penetration rate of about 1294.7 * 10-3 m2, extremely high hole, high permeability reservoir; oil analysis showed that oil sands group with non hydrocarbon and asphaltene, less saturated hydrocarbons and aromatics content, which has suffered serious biodegradation. Through the study summarized the metallogenic enrichment regularity of oil sands. Research The distribution of oil sands is mainly controlled by sedimentary microfacies, reservoir heterogeneity, fracture and unconformity and stratigraphic distribution of the buried depth and other factors; the plane reservoir is mainly distributed in the FS73 block, FZ007 block, Z1 block and Z32 block near the longitudinal K1q23 sand group internal reservoir development best. A wide range of oil, oil sands as main enrichment layer. In the final phase control constraints, to build the layer of 3D geological model using stochastic modeling method, respectively on reservoir property parameters (porosity, permeability, oil saturation) of the spatial distribution of prediction results and the actual situation of study area development is consistent.

【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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