测井技术2011，Vol.35Issue(3)：238-242,5.
低孔隙度低渗透率储层物性参数与胶结指数关系研究
On the Relation Between Cementation Exponent m and Petrophysical Parameters of Low Permeability and Low Porosity Reservoir
摘要
Abstract
Archie equation is a bridge between resistivity logging and quantitative saturation evaluation in reservoir, and links porous rock electrical properties with the types of fluid contained. For high porosity sandstone reservoir, the relation can be well described by Archie's formula, but in low permeability and low porosity reservoirs, the relationship between formation factors and porosity is different from Archie formula described. Due to conductive medium and seepage medium in reservoir are formation water, the conductive path and seepage path can be approximately regarded as the same. So pore tortuous degree can be used to connect petrophysical parameter with electrical parameter of rock. The analysis for pore tortuous degree of rock indicates that in low permeability and low porosity reservoir the higher permeability is, the more pore tortuous degree is. That when permeability is low, pore tortuous degree is less, which shows that it exists mutual cross-linking communication among micro-capillaries, relatively increasing permeability of rock. Micro-capillary mutual cross-linking leads to form the conductive network, and enhance conductivity of reservoir rock. When porosity decreases, the proportion of fine and micro-capillary pore increases, the value of cementation exponent (m) reduces.关键词
测井资料；低孔隙度；低渗透率；孔隙曲折度；胶结指数Key words
log data/ low porosity/ low permeability/ pore tortuous degree/ cementation expo-nent分类
天文与地球科学引用本文复制引用
陈继华,陈政,毛志强..低孔隙度低渗透率储层物性参数与胶结指数关系研究[J].测井技术,2011,35(3):238-242,5.基金项目
国家科技重大专项大型油气田及煤层气开发“十一五”项目子课题(2008ZX05002)资助 （2008ZX05002）
