【作者】 白薷；

【导师】 张金功；

【作者基本信息】 西北大学 ， 油气田地质与开发， 2012， 博士

【摘要】 鄂尔多斯盆地陇东地区富县组、延10-延6油层组是该地区侏罗系的主要产油层,发育河流、曲流河三角洲沉积,属特低孔~低孔、特低渗~低渗储层。本次研究综合应用了地质、钻井、测井及地震等资料,在层序地层学、储层沉积学、地球物理测井等理论的基础上,进行了多学科、一体化的综合分析。建立了目的层段的层序地层格架,开展了物源与沉积相研究,恢复了研究区前侏罗纪古地貌特征,并对储层特征进行了分析。同时,在储层研究的基础上划分出油藏的成藏模式。本次研究取得的主要成果与认识有：1、研究区古地貌划分为侵蚀河谷、古高地、古隆起斜坡带、古阶地、河间丘。具体划分为4条古河：甘陕一级古河谷、庆西二级古河谷及贺旗支河、庆合支河两支三级支河谷；3个高地：演武高地、姬塬高地及子午岭高地；3个斜坡：演武北坡、姬塬南坡及子午岭斜坡；6个河间丘及阶地。2、研究区岩石的结构成熟度和成分成熟度均较低。物源方向主要为北和北西、南和南西；侏罗系富县组及延安组延10~延6油层组自下而上构成了河流相-曲流河三角洲相沉积体系,其中富县组、延10段主要发育辫状河沉积,自延9段逐渐向上过渡为曲流河三角洲沉积。3、研究区油气成藏的地质条件为烃源岩、油气运移、储盖组合及成藏等；将研究区油藏类型分为岩性油藏及复合圈闭油藏,其中岩性油藏在研究区多见,而复合圈闭油藏主要发育于研究区北部。4、结合研究区构造、沉积相及储层特征等多种因素,划分出研究区古地貌油藏成藏模式分别为河间丘式、坡咀式、斜坡式及高地式。更多还原

【Abstract】 Fuxian formation and Yan10～Yan6oil formation are the major oil producing zone of Longdong area in Odors basin. They are river and meandering delta sedimentary and are ultra-low porosity-low porosity and ultra-low permeability-low permeability reservoir. Geology, drilling, well logging, seismic data and so on were used in the study. On the basic of the theory of sequence stratigraphy, reservoir sedimentology, geophysical logging, the reserch was multi-disciplinary and integrated systematic analyed. We studyed on the sequence stratigraphy, source, reservoir, pre-Jurassic paleogeomorphological feature of research area and reservoir feature. At the same time, we divided accumulation model in research are.There are some main results and understanding:1. The palaogeomorphology was divided into erode-valley, ancient-upland, ancient uplift slope band, ancient terrace and mound; There are four ancient rivers:the first of Ganshan, the second of Qingxi, the third of Heqi and Qinghe; three ancient-upland: Yanwu, Jiyuan and Ziwuling ancient-upland. Six mounds and terraces.2. The structue maturity and component maturity are poor. Moreover, The direction of provenance are north and northwest, south and southwest. The Fuxian formation and Yan10～Yan6formations of Jurassic are river-meandering river delta deposits from below to above. And Fuxian Group and YanlO formation are the braid river sedimentary reservoir, Yan9formation and other formations which is above Yan9gradually become meandering river delta reservoir.3. The geological condition and factors of oil reservoir formation in research area are source rocks, hydrocarbon migration, reservoir seal assemblage and reservoir formation. The types of reservoir in area are devided into lithologic reservoir which is more in research area and complex reservoir which is distributed in north of area.4. According to Structure, sedimentary facies, reservoir characteristics and so on in the study area, we summarized that there are four oil reservoir formation models, mound model, uplift model, slope model and upland model.更多还原