摘要
采用有机岩石学全岩分析方法,结合有机地球化学资料,研究了低熟源岩中矿物沥青基质的特征与成因。低熟源岩中,矿物沥青基质广泛分布,其含量因岩性、地区和层位而异。矿物沥青基质有原生成因和次生成因,前者主要来源于沉积-成岩作用阶段原生或同生的细分散状有机质,后者为微生物降解改造产物或烃类浸染物。研究认为,原生成因的矿物沥青基质对低熟源岩具有重要的生烃意义。
By using whole rock analytical method of organic petrology and combining with data of organic geochemistry,characteristics and origins of mineral- bituminous groundmass in immature and low matural source rocks are studied.Mineral- bituminous groundmass is widely distributed in the immature and low matural source rocks.The content of mineral-bituminous groundmass changes with lithology,area and age of samples.The mineral-bituminous groundmass has both primary and secondary origins.The former derives mainly from fine-granular dispersed organic matter of primary or syngenetic origin during sedimentation and diagenesis stage.The latter is a product degrated/reworked by microbe,or material impregnated by liquid hydrocarbon.It is suggested that mineral-bituminous groundmass of primary origin should be an important maceral for hydrocarbon generation in immature and low matural source rocks.
出处
《江汉石油学院学报》
CSCD
北大核心
1997年第2期29-35,共7页
Journal of Jianghan Petroleum Institute
基金
国家"八五"重点科技攻关课题(85-102-02-06-01)
关键词
有机地球化学
有机质
矿物沥青基质
生油层
organic geochemistry
(organic petrology)
organic matter maturity
organic matter
(mineral-bituminous groundmass)
source bed
