萨尔图油田北二西区层内夹层特征研究  

Features of Interlayer Based on Small Spacing Coring Well in Block Bei ’erxi

作　　者：何宇航[1] 王志强[1] 白振强[1] 

机构地区：[1]中石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《长江大学学报（自科版）（中旬）》2013年第7期5-6,11,共3页Journal of Yangtze University(Nature Science Edition)

基　　金：国家科技重大专项(2011ZX05009)

摘　　要：层内夹层对储层内部流体流动可起到不渗透隔层或极低渗透高阻层作用,是直接影响单砂层渗透性的重要因素。为揭示层内夹层的几何参数特征及分布规律,以北二西区小井距取心井资料为基础进行层内夹层沉积特征研究,由此了解萨尔图油田北二西区不同沉积环境的层内夹层厚度、岩性以及分布部位与倾角特征。研究表明,北二西区不同类型河道砂体夹层分布及倾角差异存在较大差异;夹层厚度普遍较薄;随着沉积水动力强度的减弱,不同类型河道砂体内部夹层岩性发生规律性变化,即自下至上泥砾岩夹层逐渐减少,泥岩夹层显著增多,呈泥砾岩-粉砂质泥岩+泥质粉砂岩-泥岩的变化趋势。Interlayer can form a nonpermeable or extreamly low permeable zone to stop the fluid flow within reservoir,it is the critical factor influencing the single sand permeability.To reveal the features and rules of geometric parameter within the interlayer,based on the coring data of small well spacing in Block Bei ’ erxi,the features of sediments in the interlayer are studied.The thickness of different sedimentary eavironments,lithology,the location of its distribution and dip angle features are clarified.The result shows that there exist big differences of interlayer distribution and dip angle in Block Bei ’ erxi,interlayer thickness is generally less.With the decrease of dynamic strength of settled water,the rules lithologic changes are taken place in the interlayer of channel sand,mudstone interlayer is reduced from bottom up,mudstone interlayer is obviously raised.The changing rules are in the order of muddy gravel-silty mudstone-argillaceous siltstone-mudstone.

关 键 词：储层 层内夹层 储层构型 

分 类 号：TE121.3[石油与天然气工程—油气勘探]