摘要
利用恒速压汞及核磁共振实验研究致密砂岩储层微观孔隙结构对宏观物性及可动流体赋存特征的影响。研究结果表明:喉道非均质性是引起致密砂岩储层微观非均质性的主要原因。喉道半径、分布形态、有效孔隙和喉道数和体积等影响气藏的渗流能力,孔喉半径比大、分布范围窄是造成致密砂岩储层物性及可动流体含量低的主要原因之一。可动流体饱和度与所处空间位置无关,只与孔隙和喉道半径有关,喉道的类型差异及喉道半径的分布特征是影响可动流体饱和度的主要因素。
Nuclear magnetic resonance and constant-rate mercury intrusion experiments were carried out to analyze the influence of microscopic pore structure on physical characteristics and occurrence characteristics of movable fluid. The results show that microscopic heterogeneity of tight sandstone reservoir is mainly caused by throat heterogeneity. Reservoir percolation ability is mainly controlled by throat size, number and distribution pattern, effective porosity and throat volume. Larger pore throat radius ratio and narrower distribution range are the main reasons for poor reservoir property and low levels of movable fluid. The discretion of movable fluid saturation, which has nothing to do with the spatial location, is only related to pore and throat radius. Type of throat and distribution features of the throat radius are important factors of movable fluid saturation.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第12期4556-4567,共12页
Journal of Central South University:Science and Technology
基金
国家科技重大专项(2011ZX05044)
陕西省科技统筹创新工程项目(2011KTZB01-04-01)~~
关键词
物性
可动流体赋存特征
孔隙结构
苏里格气田
致密砂岩储层
physical characteristics
occurrence characteristics of moving fluid
pore structure
Sulige gas field
tight sandstone reservoir
