气田一点法产能试井资料处理新方法

天然气井绝对无阻流量是反映气井潜在产能的重要指标，是科学、合理地确定气井产量的重要依据，该指标目前广泛采用一点法产能试井方法来确定，而一点法产能试井资料的解释普遍采用经验方法。为此，应用修正等时试井资料的处理结果，对这些经验解释方法分析认为，气井一点法产能试井解释的经验参数(α)不仅与地层系数有关，而且还受到气藏类型的影响，不能简单地使用一个普遍性的数值，故采用目前常用的方法其计算结果误差较大。针对上述问题，考虑储层类型及特性对产能试井资料的影响，对靖边气田一点法试井资料解释的经验公式进行了校正，使结果更加准确可靠。实际应用结果表明，所提出的气井一点法产能试井解释新方法更加合理。

A NEW METHOD ON PROCESSING THE DATA FROM ONE POINT DELIVERABILITY TEST IN GAS FIELDS

The absolute open flow of natural gas wells is an important index reflecting the potential productivity of gas wells and an important basis to determine the yield of gas wells scientifically and rationally. At present, this index is established mainly by one point deliverability test, but the empirical method is generally adopted to interpret the data of one point deliverability test. Therefore, the processing results of the modified isochronal test data will be applied to analyze these methods of empirical interpretation. The conclusion is that the empirical parameter α, which is interpreted by one point deliverability test in gas fields, is not only related to the formation factor, but also influenced by the types of gas reservoir. Thus, it is improper to simply use one universal value under different situations and this is the reason why calculating by using the present commonly used method will get relatively greater error. Aiming at the deficiencies mentioned above and considering the influences of reservoir types and properties on the productivity testing data, corrections are made to the empirical formula, which is used for the interpretation of one point test in the Jingbian gas field. In this way, the results become more accurate and reliable. The application shows that this new method is practical to interpret one point deliverability test in gas fields.