海相优质烃源岩中硅钙质来源:生物骨壁壳及其碎屑  

Siliceous and calcareous sources in marine high⁃quality hydrocarbon source rocks:skeleton⁃wall⁃shell of organism and their debris

作　　者：卢龙飞[1,2] 陶国亮[1,2] 万俊雨 申宝剑[1,2] 潘安阳 秦建中[1,2] LU Longfei;TAO Guoliang;WAN Junyu;SHEN Baojian;PAN Anyang;QIN Jianzhong(Key Laboratory of Hydrocarbon Accumulation Mechanisms,SINOPEC,Wuxi,Jiangsu 214126,China;Wuxi Research Institute of Petroleum Geology,SINOPEC,Wuxi,Jiangsu 214126,China)

机构地区：[1]中国石化油气成藏重点实验室,江苏无锡214126 [2]中国石化石油勘探开发研究院无锡石油地质研究所,江苏无锡214126

出　　处：《石油实验地质》2024年第6期1157-1165,共9页Petroleum Geology & Experiment

基　　金：国家自然科学基金(41972164)资助。

摘　　要：应用超显微有机岩石学等技术,从生物分子构成及其稳定性的角度,探讨硅质、钙质骨壁壳等生物碎屑与优质烃源岩的关系。常见的具有生物硅及硅质衍生物的生物主要是放射虫等原生动物、海绵动物、硅藻、金藻及某些似鱼鳞藻疑源类等浮游藻类的硅质骨壁壳及其碎屑。在优质烃源岩中能保存下来的生物钙主要来源于浮游有孔虫、翼足虫等动物和颗石藻等浮游藻类或疑源类的钙质骨壁壳及其碎屑。这些生物硅质、钙质骨壁壳碎屑颗粒中常常含有不等量的有机质(果胶或硬蛋白,相当于Ⅲ型有机质),高成熟—过成熟阶段可生成一定量烃气,并可保存于生物结构的原生孔隙中。Using techniques such as ultra-microscopic organic petrology,the study explores the relationship between bioclasts such as siliceous and calcareous skeleton-wall-shell organism and high-quality hydrocarbon source rocks in terms of their biomolecular composition and stability.Common organisms containing biosilica and siliceous deriva-tives are mainly radiolarians and other protozoa,sponges,diatoms,chrysophytes,and the siliceous skeleton-wall-shell and debris of some planktonic algae like scales-bearing dinoflagellates.The biogenic calcium preserved in high-quality hydrocarbon source rocks is mainly derived from calcareous skeleton-wall-shell and their debris of animals such as planktonic foraminifera and pteropods and planktonic algae like coccolithophores or acritarchs.These biogenic siliceous and calcareous skeleton-wall-shell debris particles often contain varying amounts of organic matter(pectin or scleroprotein,equivalent to typeⅢorganic matter),which can generate a certain amount of hydrocarbons at high to over-mature stages and can be preserved in the native pores of biological structures.

关 键 词：硅质骨壁壳生物 硅质生屑 钙质骨壁壳生物 钙质生屑 有机质含量 生物结构原生孔 

分 类 号：P595[天文地球—地球化学]