仿真技术研究及其在川南气田管网改造中的应用

【作者】 张天军；

【导师】 李长俊；

【作者基本信息】 西南石油学院 ， 油气储运， 2004， 硕士

【摘要】 川南气田是四川最早投入开发的老气田之一，勘探开发已经历40多年，高产稳产期已经过去，1988年进入开发后期小产挖潜阶段，目前产气规模小，产量递减快。而川南地区是四川最早利用天然气的地区，用气量大，特别是中央提出西部大开发以后，天然气市场发展快，需求量增大，川南气田产气规模越来越小，满足不了市场的需求，天然气供需矛盾越来越突出，急需从南干线向川南地区补充气源，实现平衡供气的要求越来越紧迫。 管网作为连接生产和用户的纽带，起着非常重要的作用。因此，弄清川南管网的运行状况，对管网进行仿真分析，便于实施地面管网调整和改造，利于川南气田天然气的开发和利用。 本文针对天然气管网的特点，对气体管网进行稳态和动态仿真研究。根据气体在管网系统中稳态流动的连续性方程、运动方程、能量方程以及状态方程，采用亚当姆斯预测-校下法进行求解；根据气体在管网系统中动态流动的连续性方程、运动方程以及状态方程，采用中心隐式差分法进行求解。在此基础上，编制了计算机软件。 根据所编制的仿真软件，对川南地区8大区块的天然气管网进行了分析，得出了一系列结论，对川南地区天然气管网的调整和改造具有一定的指导意义。更多还原

【Abstract】 "Chuan Nan" gas field, one of the earlier developed gas field, has already been exploited and developed for more than 40 years. The high and steady gas yield period of this gas field has already passed, and this gas field came into the stage of small gas yield and producing hidden gas in 1988. Now, the producing natural gas ability of "Chuan Nan" gas field is reducing and the output of natural gas is decreasing. The south area of Sichuan province is the first area in Sichuan province to utilize natural gas and the amount of consumed gas of that area is enormous. Especially, after the strategy for Western Development was brought forward, because of the development of natural gas market, the requirement of consumed gas is increased. However, the natural gas output of "Chuan Nan" gas field is smaller and smaller, this output has not met the natural gas market’s requirement. Supply and demand contradiction of natural gas in south area of Sichuan province is more and more standing out. Therefore, the south area of Sichuan province needs to gain natural gas from south main natural gas pipeline to solve the gas supply and demand contradiction.Natural gas pipe network, as the joint of production and consumer, has very important function. Therefore, understanding and simulating the operating way of pipe network is in favor of adjust or reconstruct of pine network and exploitation and utilizing natural gas of "Chuan Nan" gas field.According to the characteristic of natural gas pipe network, this paper studies the simulation of pipe network’s steady and dynamic state. On the basis of equations of continuity, motion, energy and state when natural gas is flowing at steady state in pipe network, this paper adopts Adams forecast-correction method to solve these equations. However, on the basis of equation of continuity and equation of motion as well as equation of state when natural gas is flowing at dynamic state in pipe network, this paper adopt center implicit difference method to solve these equations. Then, computer software for natural gas pipe network simulation is produced.By using this software to analyze the natural gas pipe network in eight gas areas of "Chuan Nan" gas field, this paper elicits a series of conclusions that can guide to adjust or reconstruct natural gas pipe network in Sichuan province south area.更多还原