Characteristics of Pore-throat structure and Mass Transport in Ultra-low Permeability Reservoir

摘要：

　　Low permeability reservoir is one of the most important petroleum reserve types in China.Therefore,some basic scientific problems about low permeability reservoir such as pore-throat size distribution,principle of porous flow should be deeply studied.Pore-throat size distribution,based on 69 cores from Changqing and Daqing oilfield of China,has been measured by comprehensive using Constant-Rate Mercury Injection and Nuclear Magnetic Resonance.It has been found that the Nano-pore-throat takes more than 60 percent of the total pore-throat of the low permeability reservoir and it is the key factor affecting the flow capacity when the permeability is less than 0.5×10-3μm2.The nano-pore-throat takes less than 40 percent of the total pore-throat and micron-pore-throat takes more than 45 percent when the permeability is larger than 5×10-3μm2.And Micron-pore-throat is the key factor affecting the flow capacity of low permeability reservoir.But when the reservoir permeability is between 0.5 × 10-3μm2 and 5 × 10-3μm2,its flow capacity is determined by the sub-micron-pore-throat and the amount of micron-pore-throat.Additionally,the key forces in micro-,sub-micro- and nanoscale pore-throat has been got by analyzing.The electrokinetic coupling matrix of mass transport has been gotten by analyzing the characteristics of the mass transport in small tube at different Debye ratio and pore-throat size distribution of ultra-low permeability.

关键词： ultra-low permeability reservoir sub-microscale nanoscale electrokinetic coupling model

作者: Xiao Qianhua Yang Zhengming Wang Xuewu

作者单位: Research Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang,China Research Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang,China;L Lang fang Branch, Petro China Research Institute of Petroleum Exploration and Development,Langfang,

会议类型: 国际会议

会议名称: 中国微米纳米技术学会第14届学术年会、第3届国际年会暨第6届微米纳米技术“创新与产业化国际研讨与展览会(CSMNT2012 & ICMAN2012)

会议地点: 杭州

会议语种:英文

页码: 1-6

在线出版日期: 2012-11-04（万方平台首次上网日期，不代表论文的发表时间）