石油实验地质2024，Vol.46Issue(1)：146-157,12.DOI:10.11781/sysydz202401146
准噶尔盆地东北缘上石炭统巴山组烃源岩沉积环境分析及物源示踪
Research on sedimentary environment and provenance for hydrocarbon source rocks of Upper Carboniferous Batamayineishan Formation in northeastern Junggar Basin:
摘要
Abstract
The distribution rules and hydrocarbon potential of source rocks are the major factors which determine oil and gas exploration in the northeastern Junggar Basin.Sedimentary background and environmental changes are the main factors controlling the genesis,distribution,and organic matter types of hydrocarbon source rocks.The main and trace elements and rare earth elements in sedimentary rocks are often influenced by palaeoclimate,paleo water chemical conditions,palaeoenvironment,and palaeosource during sedimentation process.Therefore,a comprehensive analysis of the distribution patterns of elements in sedimentary rocks can help to determine sedi-mentary environment and evolution process.The geochemical characteristics of major and trace elements and rare earth elements for mudstones of the Upper Carboniferous Batamayineishan Formation from outcrops of the north-eastern Junggar Basin were studied to reveal the sedimentary environment and the tectonic setting of the prove-nance,which can provide geological constraints for the origin and development conditions of hydrocarbon source rocks.According to a comprehensive analysis on chemical weathering indicators,element contents,and ratios between various major and trace elements,the mudstones of Batamayineishan Formation were deposited in a warm and humid paleoclimate background,and the deposition process was relatively stable in a shallow water with brackish-fresh features under oxidizing environment.Major and trace elements of mudstones indicate that the parent rocks are sedimentary rocks and felsic volcanic rocks and their provenance is derived from the weathe-ring products of acidic igneous rocks of the Karamaili Island Arc,reflecting the tectonic transition from compres-sion to extension during the post collision stage.The depositional environment and tectonic setting controlled the increased input of terrestrial higher plants,resulting in the medium abundance of organic matter with good hydro-carbon generating potential.关键词
烃源岩/地球化学特征/沉积环境/巴山组/准东北缘Key words
hydrocarbon source rock/geochemical characteristics/sedimentary environment/Batamayineishan Formation/northeastern Junggar Basin分类
能源科技引用本文复制引用
蔡倩茹,王金铎,张关龙,宋智华,王圣柱,熊峥嵘,倪胜利..准噶尔盆地东北缘上石炭统巴山组烃源岩沉积环境分析及物源示踪[J].石油实验地质,2024,46(1):146-157,12.基金项目
中国石化科技攻关项目(P21077-1)和中国石化胜利油田博士后项目(YKB2301)联合资助. （P21077-1）
