【作者】 田辰丽；

【导师】 马世忠；

【作者基本信息】 东北石油大学 ， 地质工程， 2011， 硕士

【摘要】 徐家围子以东地区是松辽盆地北部最重要的探区之一,区内发育葡萄花油层和扶杨油层,本文主要研究对象为葡萄花油层。通过近年来开发区外甩井的钻探及密井网的详细解剖认为区内已有油田具有很好的外扩潜力。针对该区存在砂体规模小、储层厚度薄、油水关系复杂、储量丰度低、缺乏系统的成藏机理等突出问题,本文以高分辨率层序地层学理论及其方法技术和沉积学理论为指导,利用该区详实的岩心、钻井、测井等资料,运用“以区域骨架封闭剖面为基础的标准层控制下的洪泛面系列组合标志、沉积模式-同生断层模式指导、逐级优先逼近、逐级分区闭合渐进推开,最后成因移界”对比技术,建立了全区高分辨率等时地层格架,将研究区葡萄花油层划分为9个小层12个沉积时间单元,提出了“向南地层厚度减薄,葡萄花顶底渐变为泥岩,各层逐渐减薄”地层模式,指出研究区葡萄花油层主要为松辽盆地北部物源体系东南分支控制的河控浅水三角洲沉积体系,借助1相、3亚相、10微相的测井相模式对全区沉积微相进行了精细解剖,进一步分析了研究区储层物性分布特征,揭示了研究区主要储层为河道砂和席状砂,并应用区域成藏综合分析技术对古构造、成藏模式、成藏主控因素及油气富集规律进行综合研究,确定了有利勘探区域,为油田下一步开发及评价井部署做足准备。更多还原

【Abstract】 The area east of Xujiaweizi is one of the most important exploratory area in northern Songliao Basin, producing Putaohua oil layer and Fuyang oil layer. This thesis mainly study the Putaohua oil layer. It is considered that the existing oil field has good potential for expansion through the recent drilling of the stepout wells out of the area and the detailed dissection of the dense well pattern. Aiming at solving some outstanding problems, such as small scale of sand body, thin reservoir thickness, complex relationship between water and oil, low reserves and the lack of systematic accumulation mechanism, this thesis establishes isochronal high-resolution sequence stratigraphic framework under the guide of theories and techniques of high-resolution sequence stratigraphy and the theories of sedimentology, using the full and accurate data about the core, drilling and logging of this area, and applying comparative technique of flooding surface standard that based on regional frame closed secant and controlled by the guiding bed, sedimentation model-contemporaneous fault model guiding, progressive propriety approximation, progressive sectional closure and asymptotical expansion and finally reach genetic mobile boundary. It will divide the Putaohua oil layer into nine small layers and twelve sedimentation time units in this research area and propose the stratigraphic model that southern layer is thinning down, Putaohua top and bottom is turning to mudstone and all layers is thinning down, pointing out that the main Putaohua oil layer in the research area is the river dominated shallow-water delta depositional system controlled by the southeast branch of source system in northern Songliao Basin. This thesis also dissections the sedimentary microfacies of this research area using the logging model of 1 phase,3 sub-phase and 10 micro-phase, further analyze the characteristics of the reservoir properties distribution, and reveals that the main layers are channel sand and sheet sand. It makes a comprehensive study on ancient structure, accumulation model, the controlling factors of accumulation and oil-gas accumulation regulation with the application of region accumulation comprehensive analysis technique, and determines the favorable exploration area, making full preparation for the further exploration and appraisal of well in the oil field.更多还原