Hydrate formation and distribution within unconsolidated sediment:Insights from laboratory electrical resistivity tomography

作     者：Yanlong Li Nengyou Wu Changling Liu Qiang Chen Fulong Ning Shuoshi Wang Gaowei Hu Deli Gao Yanlong Li;Nengyou Wu;Changling Liu;Qiang Chen;Fulong Ning;Shuoshi Wang;Gaowei Hu;Deli Gao

作者机构：Key Laboratory of Gas Hydrate of Ministry of Natural ResourcesQingdao Institute of Marine GeologyQingdao266237China Laboratory for Marine Mineral ResourcesPilot National Laboratory of Marine Science and Technology(Qingdao)Qingdao266237China Faculty of EngineeringChina University of Geosciences(Wuhan)Wuhan430074China School of ChemicalBiological&Materials EngineeringUniversity of OklahomaNormanOklahoma73019USA MOE Key Laboratory of Petroleum Engineering(China University of Petroleum)Beijing102249China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2022年第41卷第9期

页      面：127-136页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：The Taishan Scholar Special Experts Project of Shandong Province under contract No.ts201712079 the National Natural Science Foundation of China under contract No.41976074 the National Key Research and Development Program of China under contract No.2018YFE0126400 

主　　题：natural gas hydrate electrical resistivity electrical resistivity tomography accumulation mechanism electrical conductivity 

摘      要：Laboratory visual detection on the hydrate accumulation process provides an effective and low-cost method to uncover hydrate accumulation mechanisms in ***,the spatial hydrate distribution and its dynamic evolutionary behaviors are still not fully understood due to the lack of methods and experimental *** this goal,we built a two-dimensional electrical resistivity tomography(ERT)apparatus capable of measuring spatial and temporal characteristics of hydrate-bearing porous *** sand(0.05–0.85 mm)was used to form artificial methane hydrate-bearing *** experiments were conducted at 1°C under excess water conditions and the ERT data were acquired and *** study demonstrates the utility of the ERT method for hydrate mapping in *** results indicate that the average electrical conductivity decreases nonlinearly with the formation of the *** some special time-intervals,the average conductivity fluctuates within a certain *** plane conductivity fields evolve heterogeneously and the local preferential hydrate-forming positions alternate throughout the experimental *** speculate that the combination of hydrate formation itself and salt-removal effect plays a dominant role in the spatial and temporal hydrate distribution,as well as geophysical parameters changing behaviors during hydrate accumulation.