【作者】 闫林；

【导师】 孙卫；

【作者基本信息】 西北大学 ， 矿产普查与勘探， 2004， 硕士

【摘要】 建立能正确反映油藏地质特征的地质模型是油藏描述的核心内容和目的，是决定油藏数值模拟、动态预测成败的关键，是油田真实客观的认识和高效合理的开发油气藏的基础。 本文以靖安油田盘古梁长6油藏为例，综合运用层序地层学、沉积学、石油地质学、储层地质学及油藏工程等多学科的理论和方法，针对该油藏低渗、特低渗储集物性、孔隙结构非均质严重、油层横向变化大、纵向含油不均等地质特征，以“准确客观的地质研究是建立可靠地质模型的基础”为指导思想，在基础地质研究的基础上，借助GMSS地质建模软件，建立了靖安油田盘古梁长6油藏三维精细地质模型，从而客观真实的反映了地下地质情况，揭示了油气富集规律，为高效合理的开发该油藏奠定了基础。 研究成果及主要认识有： 运用高分辨率层序地层学原理，对研究区层序地层进行了划分对比，识别出3种常见的短期基准面旋回层序，建立和完善了研究区单井及井间高分辨率层序地层格架，克服了以往小层对比中厚度控制、界线穿时的局限性，使小层对比划分更趋科学合理。 在研究区识别出水下分流河道、河口砂坝、水下堤泛沉积、分流间湾四种微相。骨架砂体以水下分流河道微相为主，它是研究区最有利的储集体。 储层研究表明该油藏具孔隙较大而喉道较小的孔隙结构特征，表现为中孔低渗：发育泥质和钙质两类夹层，它们在电测曲线上具不同的特征；而沉积和成岩作用是造成该油藏非均质性发育的主要因素。 运用聚类分析和判别分析方法进行了储层分类评价和流动单元的划分研究，结果表明沉积微相决定砂体展布，物性、含油性好坏，也决定了储层分类和流动单元的分类结果，这些因素之间匹配较好，如在水下分流河道微相轴部，砂体发育，物性、含油性好，非均质性弱，多属于Ⅰ类储层，A、B类流动单元。 经过对地质建模理论、方法及软件的学习，在基础地质研究基础上，借助GMSS地质建模软件，建立了靖安油田盘古梁长6油藏三维精细地质模型，对该油藏的构造、砂体展布、孔渗饱等属性参数三维空间分布特征有了更直观的认识，为下一步动态数值模拟奠定了基础。更多还原

【Abstract】 Setting up a correct geological modeling that can descript the character of a reservoir is the core and purpose of reservoir description, the key of reservoir mathematical stimulation and dynamic forecast, the base of knowing the reservoir impersonally and truthfully and developing the reservoir efficiently and accurately.The paper takes the Pan’guliang Chang-6 Reservoir in Jing’an Oil Field as the example, using different theories and techniques of many subjects including sequence stratigraphy, sedimentary, petroleum geology, reservoir geology, petroleum reservoir engineering and so on, aiming at the reservoir geological character of less and quite less permeable property, severe heterogeneity of pore structure, great change of oil-bearing bed in plane and oil saturation being asymmetrical lengthways, taking "the exact and external geological study is the base of setting up a credible geological model." as the principle of this study, on the base of basic geological study, by using GMSS which is a kind of software to set up a geological modeling, set up the geological modeling of the Pan’guliang Chang-6 Reservoir in Jing’an Oil Field, and it shows the underground geological character correctly and externally, reveals the collecting rule of oil and gas, becomes the base of developing this reservoir efficiently and accurately.Production and main cognition:By using high-resolution sequence stratigraphy, compartmentalize and contrast the bed set of the Pan’guliang Chang-6 Reservoir in Jing’an Oil Field, distinguish three normal base-level cycle, build up and perfect high-resolution sequence stratigraphical trellis of single well or between different wells, overcome the deficiency of being controlled by sand thickness and interface being inaccurate, and make the compartmentalization and contrast become more scientific and reasonable.Recognize four kinds of microfacies in research area, including underwater distributive river course, estuarine bar, etc. The underwater distributive river course is preponderant, and it is the main reservoir in research area.The study on reservoir shows that the Pan’guliang Chang-6 Reservoir in Jing’an Oil Field has the pore structure of big pore and small throat, represents middle porocity and less permeability; has two kinds of interlayers including shale interlayer and calcareous interlayer, and they have different electric log curves character; and sedimentary and diagenesis are the main factors to lead the heterogeneity of this reservoir.By using clustering analysis and discriminant analysis, study on reservoir classification and the compartmentalization of flow unit, the results shows that the microfacies decides thedistribution of sand body, properties of matter, oil saturation, and the results of reservoir classification and the compartmentalization of flow unit. They are matching, for example, in the middle of underwater distributive river course has thick sand, good properties of matter and oil saturation, weak heterogeneity, and mainly belongs to I reservoir and A , B flow unit.Though studying on theories, techniques, and softwares about geological modeling, on the base of the geological study, set up the 3-D geological model of the Pan’guliang Chang-6 Reservoir in Jing’an Oil Field by using GMSS, reveal the 3-D distribution character of the research area structure, sand body, porocity, permeability, and oil saturation, and become the base of dynamic digital modeling in the future.Yan Lin (Mineral Prospecting and Exploration) Directed by Sun Wei (Professor)更多还原