岩石矿物学杂志2026，Vol.45Issue(1)：123-136,14.DOI:10.20086/j.cnki.yskw.2026.4211
渤海湾盆地深部CO2来源与热液活动对储层的改造作用
The deep CO2 source and the reservoir-modifying role of hydrothermal activity in the Bohai Bay Basin
摘要
Abstract
The Bohai Bay Basin is one of the important hydrocarbon-bearing basins in eastern China,and its com-plex reservoir-forming characteristics are closely related to modification by deep CO2 injection and CO2-rich hydro-thermal activity.A comprehensive analysis of the correlations among CO2 content,δ13CCO2,and R/Ra indicates that the CO2 in the basin is primarily derived from CO2 released by deep mantle-derived magmatic activity.Statistical a-nalysis of CO2-bearing fluid inclusion data reveals a bimodal pattern in homogenization temperatures,suggesting that the study area reservoirs have undergone multiple episodes of hydrothermal modification.Additionally,this study summarizes various lines of evidence from petrology-mineralogy and geochemistry regarding the impact of hy-drothermal activity on reservoirs.Petrological-mineralogical evidence includes typical hydrothermal minerals such as ankerite,pyrite,chlorite,and dawsonite.In regions like the Bozhong Depression,Jiyang Depression,calcite in reservoirs exhibits lower oxygen isotope values and positive Eu anomalies in rare earth elements,indicating a hydro-thermal origin.The modification of reservoirs by deep hydrothermal fluids shows significant spatial differences.Near areas of deep hydrothermal activity,CO2-rich hydrothermal fluids significantly improve reservoir porosity and permeability through dissolution and thermal baking effects,with the peak of dissolution-induced improvement oc-curring at the leading edge of hydrothermal activity.In contrast,in areas far from deep hydrothermal activity,pre-cipitation and cementation of authigenic minerals(e.g.,dolomite,calcite,quartz)lead to reduced porosity and permeability.关键词
渤海湾盆地/富CO2热液/幔源来源CO2/储层改造/矿物沉淀Key words
Bohai Bay Basin/CO2-rich hydrothermal fluid/mantle-derived CO2/reservoir modification/mineral precipitation分类
天文与地球科学引用本文复制引用
晏宇,刘全有,李朋朋,高宇,刘佳润,朱东亚,金之钧..渤海湾盆地深部CO2来源与热液活动对储层的改造作用[J].岩石矿物学杂志,2026,45(1):123-136,14.基金项目
国家自然科学基金项目(42141021) National Natural Science Foundation of China(42141021) （42141021）
