项目名称: 天然气水合物藏注热开采可行性研究
项目编号: No.51274227
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 矿业工程
项目作者: 李淑霞
作者单位: 中国石油大学(华东)
项目金额: 80万元
中文摘要: 随着能源供应的日益紧张,对天然气水合物性质及开采技术的研究已引起世界各国政府的高度重视,注热开采是目前提出的天然气水合物藏的有效开采方式之一。国内外学者已初步进行了注热开采的动态研究,但对注热开采的影响因素及可行性尚未进行系统研究。本项目模拟海洋地质条件,首先在填砂模型中模拟生成各种不同初始条件的水合物藏,然后通过注入热水进行注热开采的物理模拟实验,分析水合物藏地质参数(包括初始水合物饱和度、初始温度、初始渗透率等)和注热参数(包括注入热水温度、注热水速度、注热量、注热水盐度等)对水合物分解产气量及其他动态指标的影响,得到天然气水合物藏注热开采的主要影响因素及规律;同时根据实验结果和传热学理论分析,建立热分解前缘移动速率模型;最后进行天然气水合物藏注热开采的能量效率分析,评价不同类型水合物藏注热开采的可行性,从而为今后天然气水合物藏的注热开采提供重要的理论依据。
中文关键词: 天然气水合物;注热开采;热前缘;能量效率;
英文摘要: With the increasing tension of energy supply, governments all over the world have paid attention to the studies on properties and exploitation technology of natural gas hydrate. Heat injection is one of the effective ways of hydrate exploitation. Scholars at home and abroad have conducted preliminary dynamic research on the dissociation of natural gas hydrate by heat injection, but influence factors and behaviors of hydrate dissociation have not yet been studied systematicly. A physical model is developed to simulate hydrate reservoirs under the marine geological conditions. At first,the formation of hydrate in different initial conditions is simulated in the sand-packed tube. Then, inject hot brine to decompose the natural gas hydrate. The geological parameters(including initial saturation, initial temperature,initial permeability et al.)and injection parameters (including heat injection temperature, heat injection rate, injection heat, salinity,et al.) influencing production behavior are analysed. The main influence factors and regulations are summarized. In addition, according to the results of the experiments and heat transfer theory analysis, thermal dissociation front movement speed model is established,and the rules of the movement are analysed. Finally, energy efficiency and feasibility on dissociation
英文关键词: Natural gas hydrate;Thermal dissociation;Thermal front;Energy effiency;