水合物合成电容特性与降压开采二维实验研究  

2D EXPERIMENTAL STUDIES ON HYDRATE SYNTHESIS ELECTRIC CAPACITY CHARACTERISTIC AND PRODUCTION BY DEPRESSURIZING SYSTEM

作　　者：杜燕[1] 何世辉[2,3] 黄冲[2,3] 冯自平[2,3] 

机构地区：[1]浙江海洋学院船舶与建筑工程学院,浙江舟山316000 [2]中国科学院广州能源研究所 [3]中国科学院可再生能源与天然气水合物重点实验室,广东广州580640

出　　处：《西南石油大学学报（自然科学版）》2009年第4期107-111,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

摘　　要：在天然气水合物二维开采模拟系统基础上,进行了水合物原位生成及分解过程的实验研究,探讨了温度、压力及电容的变化特性;开展了天然气水合物降压开采二维实验研究,得到了二维开采过程中各参数的动态变化规律,并对敏感因素进行了评价。在水合物合成过程中,随水合物饱和度的增加,水量的不断减少,电容量总体减小趋势明显。降压开采表明在二维平面上存在一定的压差与温差,其中温降随与开采井的距离增大而减小。产气过程分为流动阻力控制、分解速率控制以及残余气体采出三个部分,主要受分解速率和流动阻力共同影响。Variation of pressure,temperature and electric capacity is discussed by the experiment of the synthesis and dissociation of NGH based on the two-dimensional experimental system.Furthermore,the experiment on hydrate production by depressurization is carried out.An understanding about dynamic characteristics of parameters and influencing factors are achieved.In the synthesis experiment,electric capacity becomes lower as water volume decreases because of synthesis of NGH.Pressure and temperature difference can be observed during the production by depressurizing,meanwhile,the degree of temperature decrease is higher as the increase of the producers' spacing.Three parts are observed in the process of production by depressurization,which are controlled by dissociation rate and flow resistance.

关 键 词：天然气水合物(NGH) 二维 电容 降压开采 温度 

分 类 号：TE33[石油与天然气工程—油气田开发工程]