大庆石油地质与开发2012，Vol.31Issue(2)：91-97,7.DOI:10.3969/J.ISSN.1000-3754.2012.02.018
苏里格低渗透砂岩气藏束缚水饱和度研究
RESEARCHES ON IRREDUCIBLE WATER SATURATION OF LOW-PERMEABILITY SANDSTONE GAS RESERVOIR IN SULIGE GASFIELD
摘要
Abstract
Irreducible water saturation is one of the important parameters for low-permeability sandstone gas reser voir evaluation. With the help of unsteady-state constant pressure gas driving method combined with nuclear mag netic resonance (NMR) T2 spectrum technology, the changes of the water saturation and the establishment process of the irreducible water saturation for the low-permeability sandstone gas reservoirs cores are studied under different gas flooding conditions in He8 Member of Sulige Gasfield. The research results show that the water distribution state is prone to be stable and up to irreducible water situation after injecting about 50 pore volume displaced multiples ( PV) under the average pressure differential; there are excellent correlation between the water saturations in differ ent stages of gas drive and PV and displacement time under the average pressure differential; The displacement time to form irreducible water state changes with different displacement pressure and permeability differentials, so it canthe evidence to judge whether the irreducible water state is formed or not. With the increase of the displacement pressure differential, the (irreducible) water saturations at different stages of gas drive all tend to decrease, but the degree are limited. There is much better coincidence in the irreducible water saturations established by gas drive method and centrifugal method. The irreducible water saturations of low-permeability sandstone gas reservoirs in Su lige can be accurately obtained by the integration of above two experimental methods.关键词
低渗透/砂岩气藏/束缚水饱和度/非稳态/气驱/核磁共振/驱替体积倍数/离心法Key words
low permeability/ sandstone gas reservoir/ irreducible water saturation/ unsteady state/ gas drive/NMR/ pore volume displaced multiple ( PV) / centrifugal method分类
能源科技引用本文复制引用
郭和坤,刘建坤,李太伟,雷琛,薛小佳,李振涛..苏里格低渗透砂岩气藏束缚水饱和度研究[J].大庆石油地质与开发,2012,31(2):91-97,7.基金项目
国家自然科学基金项目“低渗透气藏储层特征及流体运动渗流机理研究”(10672187)资助. （10672187）
