收稿日期: 2015-04-28
修回日期: 2015-05-22
网络出版日期: 2015-08-10
基金资助
国家重点基础研究发展规划(“973”)项目(编号:2012CB214701);中央高校基本科研业务费专项基金(编号:lzujbky-2013-114);国家自然科学基金(编号:41202095);教育部科学技术研究重大项目(编号:311010)联合资助.
Experimental Investigation of Water Absorption and Its Significance on Pore Network Connectivity in Mudstone from Silurian Longmaxi Formation,Sichuan Basin
Received date: 2015-04-28
Revised date: 2015-05-22
Online published: 2015-08-10
吕海刚,于萍,闫建萍,邵德勇,贾详娟,张同伟 . 四川盆地志留系龙马溪组泥页岩吸水模拟实验及对孔隙连通性的指示意义[J]. 天然气地球科学, 2015 , 26(8) : 1556 -1562 . DOI: 10.11764/j.issn.1672-1926.2015.08.1556
The water uptake and main controlling factors on the organic-rich mudstone of Longmaxi Formation are investigated by water absorption experiment,N2 absorption and TOC and clay mineral contents.The results show that TOC and clay mineral contents are key factors that affect water absorption on mudstone.Water uptake in mudstone has a positive correlation with BET surface area,and the water uptaking in mudstone absorption is spontaneous and reversible.Based on the linear correlation between saturated water uptake of the same sample with different sample size and volume,the calculated effective porosity is 6.23%.Water absorption experiment provides a new method to measure the connected and effective porosity.
Key words: Mudstone; Pore structure; Connectivity; Water absorption
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