海洋地质与第四纪地质2025，Vol.45Issue(2)：215-224,10.DOI:10.16562/j.cnki.0256-1492.2024053001
矿物类型对天然气水合物生成过程影响
Effect of mineral type on the formation of natural gas hydrate
摘要
Abstract
The formation of natural gas hydrates in sediments is constrained by various factors,among which the physical and chemical properties of the sediments should not be overlooked.Based on the mineral composition of sediments in the South China Sea,the formation of natural gas hydrate was simulated experimentally by using four different minerals,olivine,carbonate,feldspar,and quartz.Results show that at low water saturation,the stronger hydrophilicity of the mineral,the longer the hydrate nucleation time;while at high water saturation,the effect of mineral hydrophilicity is weakened,the hydrate nucleation time is similar among the four minerals.The hydrate growth rate of olivine is the fastest,while quartz is the slowest.Additionally,the hydrate in all four minerals showed the characteristic of growing from sediment to the upper gas-phase space,which resulted in a trend of rapid growth followed by slow growth and then rapid growth of hydrates.The final hydrate saturation of the four minerals under same moisture content conditions was similar,ranging 12.52%～34.32%.The experimental results provide a reference for geological exploration and site selection for hydrate mining.关键词
天然气水合物/矿物/亲水性/初始含水率/成核时间Key words
natural gas hydrates/minerals/hydrophilicity/initial moisture content/nucleation分类
海洋学引用本文复制引用
孙始财,田万鑫,孟庆国,卜庆涛,吴能友,黄丽..矿物类型对天然气水合物生成过程影响[J].海洋地质与第四纪地质,2025,45(2):215-224,10.基金项目
国家自然科学基金"水合物降压开采过程中裹挟气泡、砂粒的储层产水多相运移机理"(52074165),"基于声电联合特性的裂隙充填型水合物识别及机理分析"(42376218),南海北部神狐海域水合物储层特征对开采产能的影响(41706064) （52074165）
崂山实验室科技创新项目"西太平洋天然气水合物资源与环境效应及智能探测技术"(LSKJ202203500) （LSKJ202203500）
山东省自然科学基金"储藏级水合物降压分解热效应机理及其与产能的响应关系"(ZR2022MD008) （ZR2022MD008）
