【作者】 陶莹；

【导师】 周文；

【作者基本信息】 成都理工大学 ， 油气田开发地质， 2009， 硕士

【摘要】 鄂尔多斯盆地石油、天然气、铀、煤炭资源半富,是我国重要的能源工业基地。麻黄山西区块位于鄂尔多斯盆地天环坳陷中段西部,处于鄂尔多斯盆地西缘冲断带南段。工区延安组砂体发育,是目前中石化华北分公司勘探开发的主要层位之一。然而其砂体变化快,成岩作用复杂,有利储层的分布及控制因素不明确,直接影响了油气的勘探开发效果。因此在这种情况下,搞好储层特征研究,进行储层评价十分必要。论文利用麻黄山现有的勘探生产报告,依靠钻井、测井、地震和分析化验资料,采用传统的基础地质学方法,结合先进的理论技术和方法开展研究,在整理、消化、总结前人研究成果的基础上,对延安组储层特征进行研究。总结分析了延安组储层的沉积特点,沉积砂体展布特征,将工区延安组划分为河流相沉积,为河床和河漫两个沉积亚相河道方向大致为自西向东,河道位置表现以继承性为主,略有变化,具备一定储集能力的砂体主要为河道砂坝和河漫滩沉积;对延安组砂岩的岩石学特征、物性特征及孔隙结构特征进行了研究,该区岩石主要以石英砂岩为主,以中-细喉为主;储层岩石的成分、储集层所处的沉积相带、储层的成岩作用及构造作用等对储层物性具有明显地控制作用,造成储层孔渗降低的成岩作用以胶结作用最强,其次是压实作用和粘土矿物充填;利用测井资料对储层物性参数进行解释及储层参数分布研究,并对油水层进行识别,探讨了油层的分布特点,绘制了油藏剖面图,认为宁东2井区的油藏主要以延9层段为主,宁东3井区主要以延8储层为主;根据物性及孔隙结构特征,建立储层分类评价标准,将工区储层划分为四类,Ⅰ、Ⅱ储层具有较好的储集渗流能力,Ⅲ类储层较差,Ⅳ类为非储层;在对沉积相、储层物性和砂体平面展布特征研究的基础上,对麻黄山西区块东北部延8、延9、延10储层进行了综合评价,研究区以Ⅱ、Ⅲ类储层为主,Ⅰ类储层在宁东8-大东19-宁东108井区少量发育;结合工区裂缝发育情况,指出储层有利发育区。更多还原

【Abstract】 Ordos basin is an important industrial base, which is rich in Petroleum, natural gas, uranium and coal. Mahuangshan block which is located in the west middle Tian huan depression in Ordos basin. The study area is an mainly layers for exploration and development for North China Branch of Sinopec rich in sand-body in Yan an formation. However, the factors including sand-body changes quickly, complexity of diagenesis, unclear controlling factors for distribution of favorable reservoir directly affect the exploration and development’s effects of oil and gas. So it is necessary for making study for the characteristics and evaluation of reservoir under aforementioned case.Based on summing up and collating the previous studies, combination of advanced technologies and method to carry out scrutiny, this paper takes the drilling analytics, the geophysical well logging, the seismology, the experimental data and the traditional geology method to study the characteristics of Yan an formation by using available exploration and production data in study area. By analyzing of the sedimentary features and features of sand-body distribution for reservoir in Yan an formation, we can divided Yan an formation into fluvial facies and alluvial flat parfacies. There into, the sand-body which have a certain capacity is mainly including the channel bar and alluvial flat deposit. Based on study of petrologic characteristics, properties characteristics and pore structure in Yan an formation, we regard that the lithology of study area is mainly with sub-lithic sandstone and the pore types is mainly with shrink-type, neck type and narrow sheet. Moreover, the study shows that the reservoir property is clearly under the control of composition of reservoir rocks, sedimentary facies, reservoir diagenesis and tectonic activities and so on. The first is lithogenesis during the factors of thin out porosity and permeability, the second is compaction and clay mineral filling. Towards to the good permeability, pore throat development is the most important factors and the next is particular denudation. The paper takes advantage of log data to interpret the formation parameters and study the parameters distribution, and then identify the liquid, draw the reservoir section and talk about feature of oil layer distribution. According to physical property and pore structure, the author got the criterion of reservoir classification and defined 4 container rock. Based on the study of sedimentary facies, reservoir parameters and sand plane distribution, the author comprehensively evaluated the character of Yan-8, Yan-9, Yan-10 reservoir formation for north-eastern part of west block in Mahuangshan area, the study shows thatⅡ,Ⅲtype of reservoir is mainly ,Ⅰ-type reservoir is only in Ningdong 8 - Dadong 19 - Ningdong 108 wells development zones. Finaly the author pointed out the available up-growth block.更多还原