气田增压工程后评价中增产气量测算分析

Calculation of Stimulation Yield during Post-evaluation of Gasfield Pressurizing

在气田(单井)增压后评价中,增产气量预测值的准确性对财务评价结果有直接影响,如何准确预测增产气量值是一个难题。为此,针对增压可行性报告中不增压产量预测与实际情况相符及不符两种情况,采取了不同的测算方法进行修正,利用修正后的增产气量对某气田增压工程开展了后评价,结果表明经修正的增产气量预测方法的测算结果更为接近实际情况。

During post- evaluation of gasfield pressurizing, whether correct or incorrect of predicted stimulation yield can affect directly financial appraisal. How to predict accurately this yield is very difficult. So, two cases are analyzed, including the consistencyand inconsistency between the predicted yield without pressurization in feasibility report and the actual one. And this yield is modified by different methods. The modified method is adopted for postevaluation of pressurizing a gasfield. Result shows that the yield predicted from the method is much closer to the actual one. Finally, some suggestions are made, such as to enhance the examination of economic evaluation in feasibility report, and to make sure that the raw data is real and reliable.