CAJ | 학술논문

水合物分解阵面是水合物开采现场监测关注重点之一，其传播速率与水合物开采效率密切相关，但是目前松散沉积物中水合物降压分解阵面演化数据积累明显不足。进行了松散沉积物中水合物降压分解阵面演化实验，采用时域反射技术测量了水合物饱和度随时间的变化，分析了水合物分解阵面的传播规律；提出了轴对称水合物降压分解数学模型并进行了适用性验证，通过敏感性分析探讨了影响因素对水合物分解阵面演化过程的影响关系。基于室内实验和数值模拟认为：（1）水合物降压分解阵面传播距离与其传播时间平方根呈近似线性关系；（2）水合物降压分解阵面传播速率随其传播距离的增加而迅速减小；（3）水合物降压分解阵面传播速率随着绝对渗透率基准值、气体饱和度初始值和环境温度的增加而增大，随着水合物饱和度初始值、下降指数和出口压力的增加而减小。
수합물분해진면시수합물개채현장감측관주중점지일，기전파속솔여수합물개채효솔밀절상관，단시목전송산침적물중수합물강압분해진면연화수거적루명현불족。진행료송산침적물중수합물강압분해진면연화실험，채용시역반사기술측량료수합물포화도수시간적변화，분석료수합물분해진면적전파규률；제출료축대칭수합물강압분해수학모형병진행료괄용성험증，통과민감성분석탐토료영향인소대수합물분해진면연화과정적영향관계。기우실내실험화수치모의인위：（1）수합물강압분해진면전파거리여기전파시간평방근정근사선성관계；（2）수합물강압분해진면전파속솔수기전파거리적증가이신속감소；（3）수합물강압분해진면전파속솔수착절대삼투솔기준치、기체포화도초시치화배경온도적증가이증대，수착수합물포화도초시치、하강지수화출구압력적증가이감소。
Hydrate dissociation front is one of objects of the field monitoring during gas hydrate production,and its velocity is closely related to the efficiency of gas hydrate production.However,there are few literatures about experimental data of the hydrate dissociation front.In view of this,an experiment of hydrate dissociation front induced by depressurization in unconsolidated sediment was developed.The hydrate saturation was measured by the time domain reflection measurement,and the movement of hydrate dissociation front was analyzed.An axi-symmetric model for hydrate dissociation was proposed and its applicability was performed.A sensibility analysis for the velocity of hydrate dissociation front was carried out.Based on the experimental and numerical condi-tions,main conclusions were made as follows:first,propagation distance of hydrate dissociation front is approxi-matively linear with the square root of propagation time;second,velocity of the hydrate dissociation front de-creases obviously when the propagation distance becomes longer;finally,velocity of the hydrate dissociation front increases when the reference value of the absolute permeability,initial gas saturation,and environmental temperature increase,however,it decreases when the initial hydrate saturation,reduction index,and outlet pressure increase.