【作者】 焦建；

【导师】 谢俊； 王多云；

【作者基本信息】 山东科技大学 ， 矿产普查与勘探， 2010， 硕士

【摘要】 本文以沉积学、高分辨率层序地层学,测井地层学,地震地层学和油气储层地质学为理论指导,通过系统详细的岩心观察、结合测井资料的单井层序地层分析和地震解释成果,建立了研究区延长组长8油组的高分辨率层序地层格架体系及划分标准。对研究区地层进行了详细的划分对比,按照逐级控制的方法,建立了延长组地层三级、四级、五级层序地层格架体系。以四级旋回的上升域和下降域为编图单元,建立起以长8油组为目标的,以大约30m左右的地层厚度(基本达到单砂体层次)为研究对象的新的地层分层系统。在四级层序格架内进行了五级层序的对比和划分,对长8油组的储层沉积成因微相和展布特征进行细致刻画。从岩心描述、单井测井相和连井剖面地层对比、结合砂体的平面展布形态,分析发现研究区在长8油组主要处于三角洲前缘和前三角洲的沉积环境,主要发育有水下分流河道或水道、河口坝、前缘席状砂、浊积扇等沉积微相。水下分流河道或水道是砂体发育的有利相带,砂体粒度相对粗,分选好,杂基含量少,粒间孔隙发育且砂体规模大,是形成有利储层的基础,也是评价的有利目标。利用自然伽玛值的大小确定主砂体带的位置,结合测井相分析等技术确定沉积相的展布。更多还原

【Abstract】 This paper was based on sedimentology, high-resolution sequence stratigraphy, logging stratigraphy, seismic stratigraphy and reservoir geology theory, through the core that were detailed observed, combined the data of logging sequence stratigraphic analysis and seismic interpretation results, established the Chang8 in Yanchang Formation high-resolution sequence stratigraphic framework and division standards of the study area.The study formation has been detailed contrasted, according to step by control method, establishing the Yangchang group third-order, fourth-order, fifth-order sequence stratigraphy framework. Used the up and down domain of the fourth-order cycle to map, established a new formation classification system which was aimed to detailed contrast to the effective reservoir, and the formation’s thick was about 30 meters(almost attained single-sand body). Within the fourth-order sequence framework, compared and divided the fifth-order sequence, detailed depicted the reservoir sedimentary microfacies and distribution feature of Chang 8 content formations.Through the description of the core, the single well logging facies and the connected wells’ profile isochro nostratigraphic correlation, combined with the plane distribution of sand body shape, the Chang 8 is mainly in the delta front environment,we know it develops the sedimentary micro-facies of the submerged distributary channel Or water course, debouch bar, Delta front sheet sand, turbidite fan eg. The submerged distributary channel Or water course is the favorable facies,whose sand grain size is relatively coarse, well-sorted,Low matrix content,interparticle pore developed and very large.It is the basis for the formation of favorable reservoir and objective evaluation of the benefit.Used the distribution of the GR value to determine the main river sandstone’s position, combined the logging facies and other technical to determine the distribution of sedimentary facies.更多还原