特低渗透储层可动流体饱和度影响因素分析——以安塞油田长6储层为例  

Movable fluid saturation factor analysis of low permeability reservoir: taking the Chang 6 reservoir in the Ansai oil field as an example

作　　者：陈斌[1,2] 孙卫[1,2] 明红霞[1,2] 霍磊[1,2] 田一鸣[3] 

机构地区：[1]西北大学大陆动力学国家重点实验室,陕西西安710069 [2]西北大学地质学系,陕西西安710069 [3]中国地质大学能源学院,北京100083

出　　处：《石油化工应用》2014年第9期68-74,共7页Petrochemical Industry Application

基　　金：国家科技重大专项大型油气田及煤层气开发;项目编号:2011ZX05044

摘　　要：利用核磁共振技术,对鄂尔多斯盆地延长组特低渗透砂岩储层样品进行了测试;对可动流体饱和度参数进行了定义,分析了可动流体的赋存特征及影响因素。研究结果表明,特低渗透砂岩储层核磁共振T2谱截止值低,可动流体含量差异性较大。可动流体参数分布范围宽且具有较强的非均质性,孔隙半径整体差别不大,不是影响可动流体饱和度大小的主要控制因素。喉道的大小及连通性控制着可动流体的饱和程度。喉道半径大且喉道连通的有效孔隙个数多时,有效孔隙体积随喉道半径增大而增大,可动流体高。Using nuclear magnetic resonance（NMR）technology to test the special low permeability sandstone reservoir YanChang formation samples of Ordos basin. Defined the movable fluid saturation parameters and analyzed the occurrence characteristics and influence factors of movable fluid. The results showed that the low permeable sandstone reservoirs NMR T2 spectrum cut-off value is low, and movable fluid content has great difference. Wide range of movable fluid parameter distribution and strong heterogeneity, pore radius of the overall difference is not big, is not the main control factors affecting the size of the movable fluid saturation. The size of the throat and connectivity control of movable fluid saturation degree. When the large throat radius and number of effective pore throat connected, effectivepore volume increases along with the throat radius, movable fluid is high.

关 键 词：鄂尔多斯盆地 特低渗透砂岩储层 可动流体 微观孔隙结构 核磁共振 

分 类 号：TE311[石油与天然气工程—油气田开发工程]