地球学报2025，Vol.46Issue(3)：683-693,11.DOI:10.3975/cagsb.2024.092501
羌塘盆地中侏罗统布曲组包裹体特征及油气成藏期次研究
Fluid Inclusion Characteristics and the Hydrocarbon Accumulation Stages of the Middle Jurassic Buqu Formation in the Qiangtang Basin
摘要
Abstract
The hydrocarbon accumulation stages of the Buqu carbonate reservoirs(J2b)in different tectonic units in the Qiangtang Basin remains unclear.In this study,the carbonate reservoirs of the Buqu Formation in the Biluo Co area,Southern Qiangtang,and in the Shengli River area,Northern Qiangtang,were taken as research objects,and petrography,microthermometry,and salt measurements of the fluid inclusions were performed.The results showed that the Biluo Co area experienced three stages of hydrocarbon charging during the burial period.The first stage occurred during the Late Jurassic-Early Cretaceous and was a high oil charging period.The second stage occurred during the Late Cretaceous and was the oil and gas charging period.The third stage occurred in the Early Paleogene,with a large amount of natural gas charging.The Shengli River area also experienced three hydrocarbon charging stages during its burial period.The first stage occurred during the Early Cretaceous and included a large amount of oil and a minor amount of natural gas filling.The second stage occurred in the Late Paleocene-Early Eocene and was dominated by oil and gas filling.The third stage of accumulation occurred in the Late Eocene,and the reservoir was filled with a large amount of natural gas.The Buqu Formation in both southern and northern Qiangtang developed some fluid inclusions with relatively high homogenization temperatures,which may be related to the thrust faults and magmatic hydrothermal activities.The second accumulation occurred during the Cenozoic.In general,the hydrocarbon accumulation period in Southern Qiangtang occurred earlier than that in Northern Qiangtang.关键词
羌塘盆地/布曲组/流体包裹体/逆冲/成藏期次Key words
Qiangtang Basin/Buqu Formation/fluid inclusion/thrust faults/hydrocarbon accumulation stages分类
天文与地球科学引用本文复制引用
张莉莉,赵珍,杨易卓,王茜..羌塘盆地中侏罗统布曲组包裹体特征及油气成藏期次研究[J].地球学报,2025,46(3):683-693,11.基金项目
本文由中国地质科学院基本科研业务费项目"羌塘盆地重点地区选区评价研究"(编号:JKY202301)和中国地质调查三级项目"羌塘盆地阿木错凹陷油气地质调查"(编号:DD20221855)联合资助. This study was supported by Central Pub-lic-interest Scientific Institution Basal Research Fund(No.JKY202301)and China Geological Survey(No.DD20221855). （编号:JKY202301）
