CAJ | 학술논문

建立了可模拟海底天然气水合物形成环境的大型三维成藏实验模拟装置，其主体高压反应釜内径500 mm，高1000 mm。在此基础上，采用填砂模型，进行了甲烷溶解运移体系下甲烷水合物生成与聚集过程的实验模拟分析。实验流程为：甲烷溶解于 NaCl 溶液中，再泵送进入高压反应釜，在沉积层中渗流并生成甲烷水合物。通过30个电阻率传感器监测甲烷水合物的生成和聚集过程。实验结果表明，甲烷溶解运移体系下甲烷水合物生成之后首先分散在溶液中，当溶液的总甲烷浓度（溶解的甲烷及水合物分散相中的甲烷）达到操作条件下盐溶液体系甲烷饱和溶解度后，甲烷水合物从溶液中析出。电阻率分布实验结果表明，析出甲烷水合物的聚集区域受溶液流动控制。
건립료가모의해저천연기수합물형성배경적대형삼유성장실험모의장치，기주체고압반응부내경500 mm，고1000 mm。재차기출상，채용전사모형，진행료갑완용해운이체계하갑완수합물생성여취집과정적실험모의분석。실험류정위：갑완용해우 NaCl 용액중，재빙송진입고압반응부，재침적층중삼류병생성갑완수합물。통과30개전조솔전감기감측갑완수합물적생성화취집과정。실험결과표명，갑완용해운이체계하갑완수합물생성지후수선분산재용액중，당용액적총갑완농도（용해적갑완급수합물분산상중적갑완）체도조작조건하염용액체계갑완포화용해도후，갑완수합물종용액중석출。전조솔분포실험결과표명，석출갑완수합물적취집구역수용액류동공제。
In order to investigate the formation behavior of methane hydrate, a large three-dimensional physical simulation device with a high pressure vessel ofφ500 mm×1000 mm was designed and built to experimentally simulate the formation and accumulation of natural gas hydrate in natural environment. Using this apparatus, the formation and accumulation process of hydrate in quartz sand from methane-dissolved seeping system was experimentally studied. Methane was first dissolved in brine, and pumped into the high pressure vessel, then seeped into sediment and formed hydrate. The whole hydrate formation and accumulation process was tracked down by 30 sensors of electrical resistivity. The experimental results showed that for methane-dissolved seeping system, the formed hydrate first dispersed into the solution. After the total methane concentration (methane in solution and hydrate) is higher than methane solubility under liquid-vapor equilibrium condition, the hydrate will precipitate from solution. The distribution data of electrical resistivity indicated that the accumulation region of hydrate is limited by the fluid seeping behavior.