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气田进入产量递减期后，一般通过Ａrps递减方程，应用典型曲线拟合或坐标变换法来研究递减规律。这些分析方法必须首先给定Ａrps进行了研究递减方程的形式，然后再求取有关的递减参数，因而不仅计算工作量大，而且带有很大的人为误差，以的递减参数一般不是最优的，预测结果往往偏差较大，分析认为，根据已获得的生产历史数据，经过一定的加工处理来预测气田产量，其准程度既取决于所使用的数学模型，又取决于所使用的数据处理方法，为此提出了用模拟退火算法求取递减以数的新方法，该方法应用于全局优化理论，依据通用递减方程，将递减参数的求解总是为最优化总是，然后再根据求取的递减判别递减类型，因此该方法通用性强。两个实际算例说明预测结果优于常规Ａrps递减分析方法，和实际数据吻合程度很高，适合于现场的推广应用。

A New Method for Restoring Production of Liquid-loading Dead Gas Wells by Drilling

??After the gas field has entered into the production decline stage,its decline law can be studied by use of the typical curve fitting method or coordinate transform method through Arps hyperbolic decline equation generally.According to these methods it is necessary to determine the form of Arps equation first,then to acquire relevant decline parameters.Therefore,not only the amount of calculation work is large,but also the human error is astonishing;and the decline parameters acquired aren't optimum in general and the result predicted is often widely discropant with the practical value.Through analyzing it is considered that the accuracy of predicting the production of gas field in accordance with the historical production data acquired and processed is decided both by the mathematic model applied and by the method used for processing data.For this reason,a new method of acquiring decline parameters by use of analog annealing algorthim is proposed.Through applying the global optimum theory and in light of the universal decline equation;by the new method the solving problem of the decline parameters can be transformed into an optimizing problem and then the type of decline may be discriminated according to the decline parameters acquired,so that this method can be commonly used in a wide range.Through calculating two examples it is indicated that the result predicted by the method is better than the one by Arps decline analysis method,being well coincident with the practical data.Therefore the method is suitful for being popularized and applied in fields.