鄂尔多斯盆地三叠系油砂中芴酮系列化合物成因

DETECTION OF ALKYLATED FLUORENONES AND THEIR ORIGIN IN OIL SANDS OF TRIASSIC, THE ORDOS BASIN

赵欣 史基安 王金鹏 王琪 卢龙飞 王雷 王有孝

Zhao Xin Shi Jian Wang Jinpeng Wang Qi Lu Longfei Wang Lei Wang Youxiao

中国科学院, 兰州地质研究所, 气体地球化学重点实验室, 兰州, 730000 2. 长安大学, 地球科学与国土资源学院, 西安, 710054 3. 中国科学院, 研究生院, 北京, 100039

Key Laboratory of Gas Geochemistry, Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China 2. School of Earth Science and Land Resources, Chang'an University, Xi'an, shaanxi 710054, China 3. Graduate school of Chinese Academy of Sciences, Beijing 100039, China

从鄂尔多斯盆地三叠系延长组6个油砂样品的抽提物中,通过色谱-质谱(GC-MS)分析,首次检测出一系列C0-5芴-9-酮化合物和苯并芴-9-酮化合物,它们是芴和苯并芴在储集层中发生氧化-还原反应的产物。这个过程是由于在晚成岩A期,陆表暴露时期,伴随着含氧和细菌的大气淡水的渗入,在延长组储集层中的铝硅酸盐矿物参与下,油砂中的烷基芴和苯并芴在碱性成岩环境下氧化的结果。

Six oil sand samples were collected from the sandstone reservoirs of Yanchang Formation in the northwestern areas of the Ordos Basin,Northwest China.Oil sand extracts were analyzed by GC-MS.A series of alkylated fluorenones have been detected.They are products of oxidation-reduction reaction of fluorene and benzo-fluorene in reservoir.This process can be considered as the result of that during the time of subaerial exposure in the later diagenetic stage A,the fluorene and benzo-fluorene in oil sand are oxidized to fouow the permeating of meteoric water with bacteria and oxygen under the alkali-diagenetic enviornment and participation of the sialicate in Yanchang Formation.

国家自然科学基金项目(40272065);中国科学院知识创新重要方向项目(KZCX3-SW-128)

https://doi.org/10.11781/sysydz200601049