摘要
TOUGH2是美国劳伦斯伯克利国家实验室开发的一套渗流模拟软件,其研究内容与水合物藏的开采在气液渗流、质量和热量的传递等方面有很多的共同之处,但水合物的开采又涉及到固态水合物分解产生气体和液态水或固体冰的,与TOUGH2现有内容有一定区别。为了将TOUGH2软件应用于天然气水合物藏开采模拟,在对TOUGH2的功能进行充分解读后,进行了以下三个主要修改:1针对天然气水合物三相变化的状态方程模块;2添加天然气水合物分解速率和相平衡计算模块;3在TOUGH2程序的主体控制方程中,添加由天然气水合物分解引起的变化量。通过上述修改和程序调试,形成了一套基于TOUGH2的水合物藏开采数值模拟软件。利用该软件对神狐海域的水合物藏参数进行计算,其结果与劳伦斯伯克利国家实验室开发的水合物藏开采模拟软件(TOUGH+HYDRATE)的计算结果进行对比,结果表明两者吻合很好,验证了软件的正确性。
The TOUGH2 is a set of seepage simulation software developed by the Lawrence Berkeley National Laboratory; its function has many common grounds with aspects of gas hydrate reservoir exploitation including gas and fluid seepage, mass and heat transference etc. but gas hydrate exploitation also involves solid hydrate decomposes into gas and liquid water or solid ice complicated changing process, thus has certain differences with present available TOUGH2 function. To use the software on natural gas hydrate reservoir exploitation simulation, after fully unscrambled its function, carried out following three amendments： 1） added natural gas hydrate 3phases changing state equation module; 2） added natural gas hydrate decomposition rate and phase equilibrium computation module; 3）in TOUGH2 program principal control equation, adding natural gas hydrate decomposition caused variations. Through above amendment and program debug, formed a set of hydrate reservoir exploitation numerical simulation software based on TOUGH2. Using the software carried out Shenhu sea area, South China Sea hydrate reservoir parameters computation, compared this results with results from hydrate reservoir exploitation simulation software the TOUGH＋HYDRATE developed by Lawrence Berkeley National Laboratory,indicated both agreed very well, verified the correctness of amended software.
出处
《中国煤炭地质》
2015年第8期31-37,82,共8页
Coal Geology of China
基金
重大专项课题(2011ZX05026-004)
国家专项课题(GZH201100309)
