油气地质与采收率2017，Vol.24Issue(5)：40-45,52,7.
东营凹陷樊页1井沙河街组烃源岩元素地球化学特征及其地质意义
Element geochemical characteristics of source rocks in the Shahejie Formation in Well Fangye-1 ,Dongying sag and their geological significance
摘要
Abstract
The major and minor elements of source rocks in the Shahejie Formation drilled by Well Fanye-1 in Dongying sag were analyzed systematically in order to clarify the element geochemical characteristics of the source rocks and their geological significance.According to the relation of contents of different elements with Al2O3 and CaO,the elements are classified into 3 different types.The elements of the first class,including Al,Ti,K,Co,Cr,Ga and V,are mainly sourced from terrestrial debris;those of the second class,which consist of Ca,Mg,Mn and Sr,are mainly sourced from lacustrine water;and those of the third class,including Na,Fe,Cd,Ni,Pb,Ba and Zn,are sourced from multiple and complex sources.Based on the genetic difference of the elements,4 parameters including CaO/Al2O3,Sr/Al2O3,Sr/Ba and V/(V+Ni) were preferably selected to set up a vertical comprehensive geochemical section,and the sedimentary environment evolution of the Shahejie Formation was discussed according to the changes of the parameters in the geochemical section.It shows that from the upper Es4 to the middle Es3,the enrichment of the elements sourced from the water gradually decreases and the salinity of the lake water gradually drops,and the reducibility of bottom water is gradually weakened.Based on the variation tendency,both the upper Es4 and the lower Es3 can be subdivided into four smaller sedimentary units where the palaeo-salinity and bottom water redox condition are obviously different.关键词
烃源岩/主量元素/微量元素/湖泊演化/沙河街组/东营凹陷Key words
hydrocarbon source rocks/major elements/minor elements/evolution of the lacustrine/Shahejie Formation/Dongying sag分类
能源科技引用本文复制引用
刘庆..东营凹陷樊页1井沙河街组烃源岩元素地球化学特征及其地质意义[J].油气地质与采收率,2017,24(5):40-45,52,7.基金项目
国家科技重大专项“渤海湾盆地剩余油气资源潜力研究”(2016ZX05006-001),中国石化油气勘探开发领域重大项目“济阳坳陷油气聚集规律与精细评价关键技术”. （2016ZX05006-001）
