摘要
利用色谱-质谱等分析测试技术,对四川盆地川中-川东南地区震旦系、寒武系及奥陶系储层沥青及泥岩岩样进行了地球化学特征分析。从饱和烃色谱、生物标志化合物特征等方面分析入手,对该区的烃源岩的生源与沉积环境作了详细研究。证实源岩的沉积环境主要为具有一定盐度的还原环境,生物多来自于低等水生生物的菌藻类,且储层沥青主要来自于泥岩而不是碳酸盐岩。川中震旦系-下古生界和川东南震旦系储层沥青主要来自寒武系泥岩,川东南下古生界储层沥青则为寒武系和志留系的混合来源。
By using the methods of gas chromatography-mass spectrometer analysis,the geochemical characteristics of rock samples of the Sinian-lower Palaeozoic in middle-southeast of Sichuan Basin were analyzed.Based on the characteristics of saturated hydrocarbon chromatogram and its biomarkers,the biogenetic derivation and sedimentary environment of source rocks in this area were investigated in detail.The research indicates that the depositional setting of source rocks is mainly oxygen-free environment containing salinity,and the biology comes from homoneneae of low hydrobios,and reservoir bitumen is mainly originated from mudstones.The reservoir bitumen is from originated Sinian-lower Palaeozoic in Cambrian mudstone in central Sichuan basin,and reservoir bitument in southeast Sichuan basin is mixture of Cambrian and Silurian mudstones.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2007年第4期45-51,165,共7页
Journal of Oil and Gas Technology
基金
国家重点基础研究发展计划(973)项目(2005C13422106)
关键词
川中-川东南地区
震旦系
下古生界
生物标志物
储层
沥青
地球化学
the area of middle-southeast of Sichuan Basin
Sinian-lower Palaeozoic
biomarker
reservoir bitumen
geochemistry
