古地理学报2025，Vol.27Issue(3)：731-745,15.DOI:10.7605/gdlxb.2025.062
河西走廊叠合盆地砂岩储集层成岩演化及控储因素:以雅布赖盆地侏罗系新河组为例
Diagenetic evolutions and controlling factors on sandstone reservoir in superimposed basin,Hexi Corridor:insights from the Jurassic Xinhe Formation of Yabrai Basin
摘要
Abstract
The Mesozoic superimposed basin in the Hexi Corridor is characterized by complex tecton-ic evolutions and variable sedimentary systems.The stratigraphy of these hydrocarbon-bearing basins has undergone multiple phases of burial and tectonic uplift,and hydrocarbon reservoirs exhibit diverse diage-netic alterations and strong heterogeneity.Therefore,the study of reservoir diagenetic characteristics and the associated sedimentary and diagenetic controls is essential for the successful exploration of oil and gas fields.This study focuses on the diagenetic mineralogical characteristics and evolution of the Middle Juras-sic Lower Xinhe Formation,based on a range of analytical techniques,including optical microscopy,scanning electron microscopy,and geochemical tests.Moreover,the impacts of sedimentary and diagene-tic characteristics on reservoir quality are investigated.The study demonstrates that the target layers are characterized by braided delta front and gravity flow deposit,which are dominated by arkoses and lithic ar-koses.The variations in pore space types and physical properties of sandstone reservoirs are determined by the combined influence of microfacies,burial diagenetic alterations and uplift-related dissolution.In de-tail,the medium-to thick-bedded sandstones of subaqueous distributary channel facies at the delta front are characterized by strong dissolution modification and limited secondary authentic precipitations.These reservoirs typically exhibit low porosity and medium permeability.The medium-to thin-bedded sandstones of gravity flow channel and mouth bar facies are characterized by a considerable quantity of detrital feldspar and fragments,as well as high content of ductile clay-rich matrix.Furthermore,the dissolution pores are filled by abundant authigenic albite,silica cements and clay minerals.Consequently,the sandstones ex-hibit tight reservoir characteristics,with low porosity and low permeability.关键词
叠合盆地/沉积相带/储集层/主控因素/雅布赖盆地/河西走廊Key words
superimposed basin/sedimentary facies/reservoirs/controlling factors/Yabrai Ba-sin/Hexi Corridor分类
能源科技引用本文复制引用
冯双奇,季汉成,陈亮,蒋雪桂,向鹏飞,史燕青,刘颖,李玲..河西走廊叠合盆地砂岩储集层成岩演化及控储因素:以雅布赖盆地侏罗系新河组为例[J].古地理学报,2025,27(3):731-745,15.基金项目
国家重点研发计划项目(编号:2019YFB1504101)、中国石油科技创新基金(编号:2021D002-0102)和中国石油大学(北京)科研启动基金(编号:2462023BJR011)联合资助.Co-funded by State's Key Project of Research and Development Plan(No.2019YFB1504101),Science and Technology Innovation Foundation of China Petroleum(No.2021D002-0102)and Science Foundation of China University of Petroleum(Beijing)(No.2462023BJR011) （编号:2019YFB1504101）
