地质科技情报2011，Vol.30Issue(1)：103-107,5.
低渗储层有效喉道半径下限研究:以苏北盆地高邮凹陷沙埝南地区为例
Cutoff Value of Effective Throat Radius in Low Permeability Reservoir: An Example of South Shanian Area in Gaoyou Depression, Subei Basin
摘要
Abstract
The influential factors and genesis of low limit of effective throat radius are analysed by using data of mercury-injection capillary pressure curve and rate-controlled mercury injection. The specific characteristics in low permeability reservoir are also discussed. The results indicate that cutoff value of effective throat radius rises with the increase of permeability. In the characteristic parameters of pore structure, it rises with the increase of throat radius and worsening of sorting (coefficient of sorting and coefficient of variation being higher). The relationship with the average throat radius is better than that of the largest throat radius, with their coefficient correlation selectively being 0.965 9 and 0. 879 6. When cutoff value of effective throat radius is smaller than 1.5 μm, it decreases with coefficient of the increase of uniformity.When cutoff value of effective throat radius is greater than 1.5 μm, their relationship is not obvious. In the low permeability reservoir, with the increase of thick throat's radius and its quantity, anisotropy of throats is increasing, and cutoff value of effective throat radius becomes higher.关键词
有效喉道半径下限/孔隙结构/毛管压力曲线/恒速压汞/低渗储层Key words
cutoff value of effective throat radius/ pore structure/ capillary pressure curve/ rate-controlled mercury injection/ low permeability reservoir分类
能源科技引用本文复制引用
张创,孙卫,解伟..低渗储层有效喉道半径下限研究:以苏北盆地高邮凹陷沙埝南地区为例[J].地质科技情报,2011,30(1):103-107,5.基金项目
国家科技支撑计划项目"低(超低)渗透油田高效增产改造和提高采收率技术与产业化示范"(2007BAB17B00) （超低）
