改进的极值拟合法解决试井早期资料解释问题

提出一种改进的极值拟合法。该方法能够根据实测压力导数曲线的极大值直接计算出与其匹配的理论曲线的CDe25值，从而简化了曲线拟合工作。该方法不需要径向流段数据，所以能够处理未出现径向流段的试井资料，提高了资料利用率。另外．对于均质油藏，用该方法解释资料不需要长时间关井等待出现径向流，因此能够缩短试井时间，提高油田产量，具有很好的经济效益。

Solving the Problem of Early Well Test Data Interpretation with Improved Extreme Value Matching Method

An improved extreme value matching method is proposed. It is used to directly calculate matched theoretical curve C_De~ 2S based on the maximum value of measured pressure derivative curve to simplify the curve matching work. Data of radial flow are not needed in the method. Therefore it can be used to process the well test data of non-radial flow well sections, by which data application is raised. For homogeneous reservoirs long shut-off is not needed for radial flow as the method is used for data interpretation, by which well test time is shortened for high oil production output and better economic efficiency is obtained.