摘要
随着金刚烷类化合物在原油和烃源岩评价方面的广泛应用,它们在原油和烃源岩中的来源、演化、分布等特征也受到了越来越多的关注。在对四川盆地须家河组须五段煤系泥岩进行热裂解模拟实验中发现,金刚烷类化合物主要在等效镜质体反射率（EasyRO）为1.0%~1.5%时生成,在EasyRO〉1.5%之后开始裂解。在模拟实验过程中,金刚烷参数MAI、EAI、TMAI-1分别在EasyRO值为1.5%~2.5%、1.0%~2.5%、1.5%~2.5%时与成熟度有良好的相关关系,相关系数R2都在0.784 4以上,说明这些参数可以在此范围内进行成熟度评价。另外,产率比值A/D、MA/MD、DMA/DMD和As/Ds在EasyRO值为1.2%~2.5%时也与成熟度具有良好的相关关系,相关系数R2都在0.923 6以上,说明这些比值也可作为成熟度评价指标。
Diamondoids,as a kind of compounds with high thermal stability,have been used to determine maturity widely.However,the practical applicability of diamondoid parameters remains controversial.Based on this problem,the pyrolysis simulation experiment of the coal-measure mudstone from Xujiahe Formation,Sichuan Basin was carried out.The results indicate that,with the increase of equivalent vitrinite reflectance（EasyRO）,diamondoids experience generation（1.0%〈 EasyRO〈1.5%）and destruction（EasyRO〉1.5%）.During this simulation experiment,diamondoid parameters,MAI,EAI and TMAI-1,correlate well with maturity at the range of EasyRO1.5%-2.5%,1.0%-2.5%and 1.5%-2.5%,respectively,pointing out the effectiveness and applicability of diamondoid parameters on the coal-measure mudstone.In addition,the yield ratios,A/D,MA/MD,DMA/DMD and As/Ds,also have good relationships with maturity during the pyrolysis of the coal-measure mudstone.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2015年第1期110-117,共8页
Natural Gas Geoscience
基金
中国石油天然气股份有限公司专项(编号:2014B-0608)
中国博士后科学基金(编号:2014M561002)
国家自然科学基金(编号:41173069)联合资助
关键词
煤系泥岩
热裂解
金刚烷
演化特征
Coal-measure mudstone
Thermal pyrolysis
Diamondoids
Evolution characteristics
