【作者】 聂占福；

【导师】 王雅春；

【作者基本信息】 东北石油大学 ， 地质工程， 2011， 硕士

【摘要】 莫里青断陷岩性油气藏发育,非均质性强,油气成藏规律不清,制约了油气勘探与开发。系统开展砂组及主要小层的沉积及成藏规律研究,建立该区砂体沉积、叠置及演化,可以从成因机制上揭示有利储层与油气藏发育规律,为下步油气开发提供科学依据。应用层序地层及沉积体系新理论,建立沉积模式,系统开展老莫里青地区双阳组-奢岭组砂组及主要小层的沉积微相研究,查明砂体的展布特征,探寻油气藏的分布规律。在立体空间的连井沉积断面分析基础上,以伊18井为基准,系统对双阳组的组、段分层数据进行了统层对比,并按照沉积旋回特征将双一段划分为6个砂组,将其Ⅲ～Ⅵ砂组划分为12小层。通过岩心、测井、地震等资料的综合分析,在本区双阳组一段识别出了湖泊相、扇三角洲相和湖底扇相3种沉积相、7种沉积亚相、15种沉积微相,建立了区内沉积相模式图,恢复了12个主要小层的沉积微相带展布特征。研究表明研究区东南部主要发育扇三角洲相,南部发育较小规模的扇三角洲相,西北部发育小规模的湖底扇,中部是水下分流河道和湖底扇的主要发育区,整体构成了湖泊-扇三角洲-湖底扇的沉积体系组合。双一段油气主要富集于扇三角洲前缘的水下分流河道及湖底扇的中扇区带,其次见于扇三角洲前缘的席状砂和河口坝。另外,在盆地边缘的滨浅湖沉积相带也见有油气分布;断层和岩性是控制油气富集的主要因素,研究区内的油气藏类型主要为断层-岩性复合油气藏。本文还预测了4个主要有利油气分布区。更多还原

【Abstract】 The lithologic reservoirs develops in Moliqing fault depression, the heterogeneity is strong, the oil-gas reservoir-forming rule is not clear, it restricts the oil and gas exploration and development. Systematic study on the group and the deposition of main layer and the hydrocarbon accumulation, establish the deposition, superposition and evolution of the sand bodies in this area, it can review the patterns of being propitious to the development of reservoirs by the genetic mechanism, to provide the scientific evidence for the continue drill for gas and oil. Applying the sequence stratigraphy and sedimentary system new theory, establish sedimentary pattern, systematic study on the group and the deposition of main layer and the sedimentary microfacies of Shuangyang and Sheling Group in Moliqing field, find out the characteristic of distribution of sandstone bodies and the distribution law of reservoirs.According to the analysis of three-dimensional sedimentary section and the 18 wells data, the group and members of Shuangyang are systematically contrasted, and the first member of the Shuangyang group (S1) is divided into six sand groups based on the characteristics of sedimentary cycle, itsⅢ-Ⅵsand group is divided into 12 fine layers. Through the comprehensive analysis on core, logs and seismic data, 3 types sedimentary facies of lacustrine facies, fan delta facies and sublacustrine fan facies, 7 types of subfacies, 15 types of microfacies in this region of Shuangyang group S1 are identified, the mode of sedimentary facies in the area is set up and distribution characteristics of sedimentary microfaces in the 12 main fine layers are resumed. Fan delta facies is mainly developed in the south-east , a small fan delta developed in south, a small-scale sublacustrine fan facies developed in north-west, underwater distributary channel and sublacustrine fan developed in the center of the area, which constitute sedimentary system of lacustrine facies-fan delta facies-sublacustrine fan. This rock type consists of lithic arkose primarily and feldspathic litharenite and subarkose takes second place.oil and gas in the S1 are mainly enriching in underwater distributary channel of the fan delta front and the middle of the sublake-fan, then they are found in the sheet sand and estuary dam of the fan delta front. In addition, hydrocarbons occur in shore-shallow lacustrine facies to edge of the basin; Fault and lithology are the important factors that controlled oil-gas migration and accumulation. The reservoir in the area is mainly fault-lithological complex reservoir. 4 favorable oil and gas targets are also predicted in the paper.更多还原