海洋地质与第四纪地质2013，Vol.33Issue(3)：123-131,9.DOI:10.3724/SP.J.1140.2013.03123
烃源岩中有机黏粒复合体——天然的生烃母质
ORGANO-CLAY COMPLEXES IN SOURCE ROCKS——A NATURAL MATERIAL FOR HYDROCARBON GENERATION
摘要
Abstract
Traditionally,it is believed that kerogen,a organic matter insoluble in organic solvents separated chemically from source rock,is a material for hydrocarbon generation[1].The procedure to treat samples as such,however,may destroy the original occurrence and relationship between organic matter and clay in source rocks.We extracted an organo-clay complex (＜2μm) from the crushed source rocks in the depth of 280～3 500 m,in the Jiyang sag,East China.The complex is mainly composed of layered illite-smectite ((Ⅰ)-S) and illite with a value of TOC up to 2.62％～9.78％.After treatment with H2O2.TOC remains as high as 1.23％～4.63％,suggesting that it is the components in which organic matters are enriched.The diffraction peak (d001) of the complex is 1.3～1.4nm at 250℃,and moves to 1.0 nm at 550 ℃ in XRD curves,and the exothermic peaks of the complex is extraordinary stable at 350 ℃ in DTA curves.; The result is consistent in both the XRD and DTA observations.It indicates that organic matter can enter the interlayer space of clay minerals.With PY-GC analysis,the organic matter of C5 and C25 is released from the complex in a temperature range of 250～650 ℃,and reaches a peak at about 450 ℃.Our findings reveal that organic matter can enter interlayer of clay minerals forming a kind of natural and highly stable organo-clay complex,and the composition of the organic matter in the complex is similar to the crude oil.As a kind of natural material,the organo-clay complex plays an important role in hydrocarbon generation in source rocks.关键词
有机黏粒复合体/有机质富集/特性稳定/天然生烃母质Key words
organo-clay complexes/ organic enrichment/ property stability/ hydrocarbon generation material分类
天文与地球科学引用本文复制引用
蔡进功,宋明水,卢龙飞,包于进,丁飞,徐金鲤..烃源岩中有机黏粒复合体——天然的生烃母质[J].海洋地质与第四纪地质,2013,33(3):123-131,9.基金项目
国家自然科学基金项目(41072089) （41072089）
国家油气重大专项(2011ZX05006-001) （2011ZX05006-001）
中国石油化工有限公司科技局基金项目(P11039) （P11039）
