中国石油大学学报（自然科学版）2025，Vol.49Issue(6)：42-54,13.DOI:10.3969/j.issn.1673-5005.2025.06.004
济阳坳陷桩西地区中生界火山岩成岩演化特征及有利储层分布
Evolutionary characteristics and favorable reservoir distribution of Mesozoic volcanic rocks in Zhuangxi area,Jiyang Depression
摘要
Abstract
The diagenetic processes of volcanic rocks differ markedly from those of clastic rocks.The Mesozoic volcanic rocks in the Zhanxi area underwent multi-phase diagenetic evolution involving tectonic,magmatic,and hydrothermal interactions.Based on structural analysis,hydrothermal filling charracteristics,and diagenetic mineral identification,the diagenetic se-quence of these volcanic rocks was reconstructed.During the Yanshanian NW-trending compression along the Tanshu Fault Zone,intense volcanic eruptions formed a complex dominated by dense blocky basalt and porphyritic andesite.Following so-lidification,the volcanic rocks experienced two stages of hydrothermal activity and one stage of hydrocarbon-induced dissolu-tion and filling.The reservoir properties of these lithologies vary significantly due to their contrasting diagenetic pathways.Andesite underwent a sequence of zeolite filling-calcite precipitation-chloritization-ferrocalcite replacement;basalt experi-enced chloritization-siliceous filling-ferrodolomite precipitation;and volcanic breccia followed clastic accumulation-chlorite lining-ferrodolomite cementation.Scoria porosity and permeability decreased markedly due to cementation,whereas basalt re-tained relatively high permeability despite primary porosity loss,and andesite exhibited minimal reservoir alteration.Near the Zhanan Fault,the basalt fracture system serves as a migration pathway for hydrocarbons,while dissolution cavities in andesite provide storage space.Scoria's poor reservoir quality results from hydrothermal cementation,whereas the composite zone of basaltic fractures and andesitic alteration forms a favorable hydrocarbon enrichment area.关键词
火山岩/成岩演化/有利储层/中生界/济阳坳陷/桩西地区Key words
volcanic rocks/diagenetic evolution/favorable reservoirs/Mesozoic/Jiyang Depression/Zhuangxi area分类
能源科技引用本文复制引用
孙耀庭,张鹏飞,刘菲菲,罗兰芳,张崇祥,贾艳艳,张宇蛟..济阳坳陷桩西地区中生界火山岩成岩演化特征及有利储层分布[J].中国石油大学学报（自然科学版）,2025,49(6):42-54,13.基金项目
山东省自然科学基金项目(ZR2021MD056) （ZR2021MD056）
山东省自然科学基金青年基金项目(ZR2022QE074) （ZR2022QE074）
