摘要
根据鄂尔多斯盆地麻黄山西区块大量的岩心、测井、录井和分析化验资料,从储层岩石学特征、物性特征、孔隙类型及孔隙结构三个方面对长6油组储层特征进行研究。针对储层超低-特低孔、超低-特低渗的特点,从沉积相和成岩作用两方面对致密储层物性的主控因素进行分析。研究表明,长6油组储层岩石类型主要为岩屑质长石砂岩和长石质石英砂岩,成分成熟度和结构成熟度中等-好;储集空间主要为原生粒间孔隙和粒间溶孔,孔隙结构以微喉道和片状喉道为主。水下分流河道砂体物性最好,为最有效储层;压实和胶结作用均导致储层物性变差,溶解和交代作用有利次生孔隙形成;但程度较弱,对储层改造作用有限。
Based on lots of cores, logging and analysis test data of the west Mahuangshan in Ordos Basin, the res- ervoir characteristics of formation Chang 6 from the lithological characteristics, physical characteristics, pore types and pore structure three aspects is studied. As the reservoir is extra-uhra low porosity and permeability, the sedmen- tary microfacies and the diagenesis are analysed to study the main physical property influencing factors of the tight reservoir. The study has shown that the rock types of formation Chang 6 are lithic-feldspar sandstones and feldspar quartz sandstone, the textural and compositional maturation of the reservoir are mediocre-good. The major reservoir space is primary intergranular pore and intergranular dissolved pore,the micro throat and the lamellar throat are the main pore structure. The underwater distributary channel sands are the best effective reservoir with the best physical characteristics. Compactin and cementation are the main reason of the bad reservoir physical characteristics while cor- rosion and metasomatism played very important roles in the development of secdary pores, but weaker effect, and the reformation of the reservoir is limitited.
出处
《科学技术与工程》
北大核心
2015年第2期187-192,共6页
Science Technology and Engineering
基金
国家自然科学基金项目(41340030)资助
关键词
储层特征
物性
主控因素
致密
成岩作用
长6油组
麻黄山西
diagenesisreservoir characteristicsChang 6 formation reservoirphysical characteristics the main influencing factors densewest area of Mahuangshan
