准东阜北地区侏罗系头屯河组储层特征及控制因素分析

发布时间：2018-04-17 05:13

本文选题：准噶尔盆地 + 阜北地区　；参考：《成都理工大学》2017年硕士论文

【摘要】：论文结合前人研究和成果认识的基础上,综合利用岩石普通薄片、铸体薄片、扫描电镜、物性、测井及地震等一系列分析手段,通过对阜北地区头屯河组沉积相、储层岩石学、孔隙类型、物性特征和成岩作用等的综合研究认为:(1)阜北地区头屯河组储层属于辫状河三角洲沉积,其中三角洲前缘水下分流河道、河口坝及三角洲平原分流河道是储集砂体发育的有利微相带;储集砂岩类型以长石岩屑砂岩为主,其次为岩屑砂岩,储集空间主要为剩余粒间孔,次生孔隙相对不发育,孔渗相关性较好,属于中孔-中低渗细吼型储层。(2)头屯河组主要的成岩作用有机械压实、胶结、溶蚀及自生粘土矿物沉淀等。根据泥岩的镜煤反射率、砂岩压实程度、碎屑颗粒接触关系、孔隙类型及自生矿物的发育程度及其类型分析认为研究区头屯河组处于早成岩阶段B期和中成岩阶段A期。(3)将阜北地区头屯河组划分为弱压实成岩相、弱压实-绿泥石胶结成岩相、中等压实成岩相3种成岩相类型,有利储层发育的成岩相为弱压实-绿泥石胶结成岩相。(4)沉积微相是控制储层发育的首要因素,其中分流河道和水下分流河道砂体为最有利的储集砂体类型,也控制了碎屑组分的类型;在后期的埋藏成岩过程中,粘土矿物包膜(特别是自生绿泥石)保存了头屯河组大量的原生粒间孔隙,对储层发育十分有利。因此,沉积微相、粘土矿物包膜是有利头屯河组储层发育的主控因素。
[Abstract]:On the basis of previous studies and achievements, the paper synthetically utilizes a series of analysis methods, such as ordinary rock sheet, cast thin plate, scanning electron microscope, physical property, logging and seismic, through the sedimentary facies and reservoir petrology of the Toutunhe formation in Fubei area.A comprehensive study of pore types, physical properties and diagenesis suggests that the reservoirs of the Toutunhe formation in Fubei area belong to braided river delta deposits, in which the delta front underwater distributary channel,Estuarine bar and delta plain distributary channel are favorable microfacies zone for the development of reservoir sand body, the reservoir sandstone type is mainly feldspathic sandstone, followed by lithic sandstone, the reservoir space is mainly residual intergranular pore, secondary pore is relatively undeveloped.The correlation of porosity and permeability is good, which belongs to medium porosity and low permeability fine roaring reservoir. The main diagenesis of Toutunhe formation is mechanical compaction, cementation, dissolution and authigenic clay mineral precipitation.According to the mirror coal reflectance of mudstone, the compaction degree of sandstone, the contact relation of clastic grain,The pore type and the development degree of authigenic minerals and their types indicate that the Toutunhe formation in the study area is in the early diagenetic stage B and the middle diagenetic stage A, and is divided into weakly compacted diagenetic facies.The lithofacies formed by weak compact-chlorite gel and the diagenetic facies of medium compaction are three diagenetic facies. The diagenetic facies favorable for reservoir development is weakly compact-chlorite cement-forming lithofacies. 4) sedimentary microfacies are the primary factors controlling reservoir development.Among them, distributary channel and underwater distributary channel sand body are the most favorable types of reservoir sand bodies, which also control the types of clastic components.Clay mineral coating (especially authigenic chlorite) preserves a large number of primary intergranular pores in Toutunhe formation, which is beneficial to reservoir development.Therefore, sedimentary microfacies and clay mineral coating are the main controlling factors for reservoir development of Toutunhe formation.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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