【作者】 张茹；

【导师】 李文厚；

【作者基本信息】 西北大学 ， 矿产普查与勘探， 2011， 硕士

【摘要】 论文以鄂尔多斯盆地安塞油田作为研究区域,以上三叠统延长组长101油层段作为目的层。运用沉积岩石学、储层沉积学、油层物理学和石油地质学等理论做论文思路及理念指导,在尊重前人研究成果的基础上,收集野外剖面照片,观察描述钻井岩心并进行取样,结合测井曲线及测井解释资料,以薄片鉴定、扫描电镜、砂岩孔隙度与渗透率测定、压汞实验分析等手段为主要方法,研究沉积相、储层岩石学特征、成岩作用、物性及孔喉结构等内容,旨在了解研究区储层分类及展布,找到优质储层发育部位,最终进行油气聚集有利区预测。沉积构造及测井曲线形态等相标志表明,研究区为三角洲平原沉积,砂体呈东北—西南向带状或片状分布,分流河道是储层发育的有利区带；岩心普通薄片和扫描电镜分析认为砂岩类型主要是长石砂岩,胶结物有绿泥石膜、自生石英长石、方解石、浊沸石等；成岩作用中压实、胶结和交代作用破坏原生孔隙,致使砂岩物性降低,溶蚀作用改善了储层物性；岩心铸体薄片分析得出残余粒间孔隙和溶蚀孔隙是主要的孔隙类型；压汞实验结果显示储层压汞参数跨度较大,平均表现为排驱压力中等偏大、中值压力偏大,中值孔喉半径小,孔喉结构属于小孔细—微细喉道,这些因素综合决定了研究区储层低孔、超低渗的特点。分析储层孔、渗实测和测井解释数据,参考前人储层分类标准,对研究区储层进行分类,主要发育Ⅲ类和Ⅳ类储层,局部有Ⅱ类储层。安塞油田延长组长101具备丰富的油源(长7烃源岩)、有利的沉积相带(分流河道)、良好的生储盖组合等成藏控制因素,构成了上倾致密遮挡油气藏和砂岩尖灭油气藏。通过砂体发育带、孔渗高值区以及试油结果,在长101油层段不同小层优选出13个油气聚集有利区,总体来看长1012油气聚集带明显优于长1011和长1013。更多还原

【Abstract】 The Ansai oilfield of Ordos basin is this paper’s study area, Chang 101 oil formation of Triassic Yanchang Formation in Ordos basin is elected as the target layer. Using sedimentary petrology, reservoir sedimentology, reservoir physics and the petroleum geology theories to be the concept guidance of paper, on the basis of predecessors’achievements, collecting the field profiles photos,observing drilling cores and sampling description,combination logging curve and logging interpretation data,using thin section identification, SEM,determination of porosity and permeability of sandstone,Mip experimental analysis as main method to study of reservoir sedimentary facies, petrological characteristics, diagenesis, petrophysical property and pore throat structure, etc.The target is to understand the research area reservoir classification and exhibition cloth, finding high-quality reservoir development site, eventually predicting areas favorable for oil and gas accumulation.Sedimentary structure and logging curve shape of that phase marks the research area for delta plain deposits.Sand body is northeast to southwest toward ribbon or flake distribution.Distributary channel is favorable zones for development of the reservoir.Core ordinary chip and scanning electron microscopy (SEM) analysis estimate the type of sand rock mainly be arkose,cementation content have chlorite film, spontaneous quartz feldspar, calcite, turbidity zeolite, etc.Compaction, cementation, medium diagenesis and explaination actions destroy the primary porosity, causing sandstone property be reduced, dissolition improved reservoir physical properties.Dissolition improved reservoir physical properties.Core casting thin sections concluded between the residual solution pore porosity and grain is the main pore types.Average performance for row flooding pressure is a medium to large, median pressure too large, the median radius of pore throat small, pore throat structure belong to holes fine-micro-fine throat way.These factors comprehensive decision the characteristics of study area’s reservoir is low permeability and low porosity.Analysis of reservoir pore, permeability test and logging interpretation data.Reference previous reservoir classification standard and classifying reservoir,the research area is Main III and IV classes development of reservoir with localⅡclass reservoir.Ansai oilfield Chang 101 formation have Rich oil source(Chang 7 source rock),favorable sedimentary facies (distributary channel),good soure-reservior-roof reservoiring control factors,these factors constitute the updip Dense block reservoirs and sandstone reservoirs with pointed out.Through the sand body development zone, high value porosity district and try oil results,optimization out 13 oil and gas accumulation advantageous area in different paragraphs reservoirs of Chang 101 oil formation.Overall Chang 1012 oil-gas accumulation zones obviously better than the Chang 1011 and Chang 1013.更多还原