石油实验地质Issue(6)：752-761,10.DOI:10.11781/sysydz201406752
油气储层砂岩样品制冷-加热循环解离技术实验研究
Experimental investigation on sandstone sample disaggregation using a repetitive freezing and thawing technique
摘要
Abstract
A repetitive freezing and thawing disaggregation technique, simplified as freezing technique, is des⁃cribed. The freezing technique is a new method for preparing clay suspension during the separation and enrich⁃ment of authigenic illites from reservoir sandstones. The disaggregating effects and the controlling factors have been investigated in detail using typical sandstone samples, and compared with a wet grinding technique, as a conventional disintegration method. Comparing with the wet grinding technique, the freezing technique has ad⁃vantages and disadvantages. The freezing technique is more effective to avoid detrital potassium feldspar contami⁃nation. The obtained authigenic illite K-Ar ages are more reliable as void of detrital contamination. Sample disin⁃tegration time is mainly related to porosity and permeability and long disintegration timeframes can be a disadvan⁃tage for well cemented sandstone samples. The buried depth of the sandstone samples is the main controlling fac⁃tor, as well as the shale content and organic content comprising coal seams or residual oil films or bitumen coat⁃ings. The experimental results show that the freezing technique can be used to disaggregate less consolidated or medium cemented sandstones mainly related to variable shallow to medium depths ranges. For well cemented and deeply buried sandstones with low porosity and permeability ranges, the method is less suited as long disintegra⁃tion timeframes of several months or years are required. The experimental results also show that the wet grinding is still a practical and effective technique for preparing clay suspension, with the advantages of easy⁃operation, celerity and better effects, and has very bright application futures.关键词
冷冻技术/湿磨技术/黏土悬浮液制备/自生伊利石分离/自生伊利石K-Ar测年/油气成藏史Key words
repetitive freezing and thawing technique/wet grinding technique/clay suspension preparation/au-thigenic illite separation/K-Ar dating/hydrocarbon accumulation history分类
能源科技引用本文复制引用
张有瑜,Horst Zwingmann,刘可禹,陶士振,罗修泉..油气储层砂岩样品制冷-加热循环解离技术实验研究[J].石油实验地质,2014,(6):752-761,10.基金项目
中国石油天然气股份有限公司科技攻关项目“油气勘探新领域、新理论、新方法、新技术”（2011A－0207）资助。 （）
