超深低渗透碎屑岩储层微观孔隙结构特征研究——以塔中顺托果勒地区柯坪塔格组下段为例  

The Microscopic Pore Structural Characteristics of Ultra-deep Low Permeability Clastic Reservoirs ——By Taking the Lower Member of Kepingtage Formation in Shuntuoguole Region of Central Tarim Basin for Example

作　　者：蔡玥[1,2] 李勇[1,2] 葛善良[3] 丁迎超 

机构地区：[1]长安大学地球科学与资源学院 [2]成矿作用及其动力学部级重点实验室(长安大学),陕西西安710054 [3]中石化西北油田分公司勘探开发研究院,新疆乌鲁木齐830011

出　　处：《石油天然气学报》2014年第8期12-17,3,共6页Journal of Oil and Gas Technology

基　　金：国家重点基础研究发展计划("973"计划)项目(2012CB214804);国家科技重大专项(2011ZX05002)

摘　　要：在扫描电镜和薄片观察的基础上,引入常规压汞、核磁共振和恒速压汞测试,对塔中顺托果勒地区柯坪塔格组下段(S1kL)超深低渗透碎屑岩储层微观孔隙结构特征进行了综合研究。结果表明,S1kL孔隙类型多样,以残余粒间孔为主;主要发育细喉型(低排驱压力)、微细喉型(中排驱压力)以及微喉型(高排驱压力)3种孔隙结构类型;储层微观孔隙结构对孔隙流体的微观赋存状态及其可流动性具有明显的控制作用;在S1kL超低渗透储层的开发中,较大孔喉半径及微裂缝发育程度高的储层应作为重点对象,与此同时,喉道的开发和保护也不容忽视。The microscopic pore structure of ultra-deep and low permeability clastic reservoirs in the lower member(S1kL)of Kepingtage Formation in Shuntuoguole Region of central Tarim Basin was comprehensively analyzed by scanning electron microscopy and slice observation and combined with conventional mercury penetration,NMR and constant-speed mercury intrusion technology.The result shows that in S1 kLthere exist various pore types and the main type is residual intergrannular pore.The pore structure is divided into three categories,including fine throat type of low displacement pressure,micro-fine throat type of middle displacement pressure and,micro-throat type of high displacement pressure.Microscopic pore structure has a significant influence on pore fluid occurrence and its mobility.In the development of ultra-low permeability reservoir in S1 kL,the reservoirs with larger pore throat radius and high degree of microscopic development should be emphasized and the development and protection of throat should not be ignored as well.

关 键 词：孔隙结构特征 超深低渗透储层 柯坪塔格组下段 顺托果勒地区 塔中地区 

分 类 号：P618.13[天文地球—矿床学]