鄂尔多斯盆地南泥湾油田河庄坪区延长组储层特征  

作　　者：张凤润 李晓宏[1] 

机构地区：[1]延长油田股份有限公司南泥湾采油厂,陕西延安716000

出　　处：《中国西部科技》2010年第18期11-13,60,共4页Science and Technology of West China

摘　　要：南泥湾油田河庄坪区为低孔低渗油田,查明该区储层特征对勘探、开发具有重要的理论和指导意义,通过露头观察、岩心室内分析试验等手段,对该区储层储层沉积相沉积微相特征、岩石学特征、储层孔隙类型、储层物性和成岩作用等进行研究,认为本区长4+5和长6储层为三角洲前缘沉积,砂体主要为水下分流河道砂体,主要为细粒长石砂岩,其中砂岩以浅灰色、灰色和浅灰绿色中细粒砂岩为主,分选较好,次棱角状,其成分成熟度和结构成熟度较高,本区主要储层长4+5、长6,其孔隙组合类型为溶蚀孔-剩余孔-微裂缝配套型,储层物性属低孔、低渗、小喉道为其特点,属低孔特低渗储层,碎屑岩的成岩变化,对碎屑岩储层的孔隙形成、保存及破坏起着极为重要的作用。碎屑岩储层及其储集性能既受沉积相的控制,又受到成岩作用的强烈影响。He zhuang Ping area of Nanniwan oil with low porosity and low permeability oil field area, to identify the reservoir characteristics of exploration and development has important theoretical and guiding significance, through the outcrop observation, core laboratory analysis tests and other means, the area of reservoir reservoir microfacies characteristics of sedimentary facies, rock characteristics, reservoir pore type, reservoir properties and diagenesis of study such as that of the mayor 4 ＋5 and chang-six reservoirs in the delta front deposits, mainly sand for underwater distributary channel sand bodies, mainly fine-grained feldspathic sandstone, which with light gray sandstone, gray and light gray-green fine-grained sandstones, better sorting, sub-angular shape, its composition and structure of maturity maturity high, the main reservoir in this area a chang 4 ＋5, length 6, its combination of type of pore corrosion hole-the remaining holes-complete microfracture type, reservoir properties are low porosity, low permeability, small throat of its features, is low porosity and low-permeability reservoirs, clastic rocks of the diagenetic changes in reservoir porosity of the clastic rock formation, preservation and destruction play a very important role. Clastic reservoir and the reservoir performance is well received by the control of sedimentary facies, but also strongly influenced by diagenesis.

关 键 词：长4+5、长6储层 沉积相 储层物性 成岩作用 南泥湾油田 

分 类 号：P618.130.2[天文地球—矿床学]