枯竭气藏型地下储气库的注采动态数值模拟

DYNAMIC NUMERICAL SIMULATION OF INJECTION-PRODUCTION IN DEPLETED RESERVOIR UNDERGROUND GAS STORAGE

建立地下储气库是缓解国内天然气供需矛盾的一种较为安全、有效、持久的方法。以天然气的连续性方程为基础,采用隐式有限差分方法,研究枯竭气藏地下储气库的运行情况,用追赶法求出定产量生产方式下天然气流动方程的数值解,给出改建为储气库气藏的优选方法,以此确定循环注采的设计思路。

Building underground gas storage is a safe, effective and long lasting method to relieve an imbalance between supply and demand of natural gas in China. Based on the continuity equation for natural gas, an implicit finite difference method is used to study the operation situation of depleted reservoir underground gas storage. Numerical solutions of gas flow equation in constant production mode are solved by the chasing method. The optimal selection methods of the reservoirs to be rebuilt as gas storage are given. Based on these methods, a design idea for cycle injection-production is determined.